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Climate Change Blog

 

Reclamation Releases Progress Report on Meeting Climate Change Adaptation Strategy

News article Reclamation Releases Progress Report on Meeting Climate Change Adaptation Strategy
Related Link: http://www.usbr.gov/climate/docs/2016ClimateStrategy.pdf
(Published November 29, 2016)
Source: U.S. Bureau of Reclamation
Climate Change Topics: Adaptation / Water supply, changes in supply, snowpack /
(Posted December 2, 2016)

 

Climate Adaptation: The State of Practice in U.S. Communities

Report Climate Adaptation: The State of Practice in U.S. Communities - "Communities in the U.S. are undertaking a rich array of climate adaptation actions that are making them more resilient to climate impacts. These actions provide models and lessons that can immediately help other communities better protect themselves from climate risks like flooding, heat waves, wildfires, and severe storms. In aggregate, these activities demonstrate that more U.S. communities are attempting to prepare for climate risks than previously thought. However, many of these promising practices are piecemeal and fail to comprehensively address climate change and its associated uncertainties. This suggests that, despite the many concrete vulnerability reductions achieved by our case study communities, much more work is needed for communities to holistically reduce their vulnerability to climate variability, extreme events, and climate change." Case studies. (Kresge Foundation) (Published November 30, 2016)
Climate Change Topics: Adaptation / Drought / Flooding / Land Use, environmental management systems, and regulation / Sea level rise / Water supply, changes in supply, snowpack /
(Posted December 2, 2016)

 

Climate Change Adaptation Strategy: 2016 Progress Report

Report Climate Change Adaptation Strategy: 2016 Progress Report - USBR has four goals: increase water management flexibility, enhance climate adaptation planning, improve infrastructure reliability, and expand information sharing. (Published November 29, 2016)
Source: United States. Bureau of Reclamation
Climate Change Topics: Adaptation / Dams and reservoirs / Drought / Ecosystems, Habitat, Threatened Species / Flooding / Water supply, changes in supply, snowpack /
(Posted December 2, 2016)

 

Incorporating snow albedo feedback into downscaled temperature and snow cover projections for California's Sierra Nevada

Report Incorporating snow albedo feedback into downscaled temperature and snow cover projections for California's Sierra Nevada - "California's Sierra Nevada is a high-elevation mountain range with significant seasonal snow cover. Under anthropogenic climate change, amplification of the warming is expected to occur at elevations near snow margins due to snow albedo feedback. However, climate change projections for the Sierra Nevada made by global climate models (GCMs) and statistical downscaling methods miss this key process. Dynamical downscaling simulates the additional warming due to snow albedo feedback. Ideally, dynamical downscaling would be applied to a large ensemble of 30+ GCMs to project ensemble-mean outcomes and intermodel spread, but this is far too computationally expensive. To approximate the results that would occur if the entire GCM ensemble were dynamically downscaled, a hybrid dynamical-statistical downscaling approach is used." (Walton, D. B., et al., 2016, Journal of Climate) (Published November 8, 2016)
Source: University of California, Los Angeles
Climate Change Topics: California: Statewide / Temperature / Water supply, changes in supply, snowpack /
(Posted December 1, 2016)

 

Climate Change in the Los Angeles Region

Report Climate Change in the Los Angeles Region - "The most comprehensive study of climate change in LA to date, the Climate Change in the Los Angeles Region Project was conducted by Center for Climate Science Faculty Director Alex Hall and his research group between 2010 and 2015. Dr. Hall and his team developed a novel method for bringing global climate model projections to high spatial resolution, creating neighborhood-by-neighborhood projections of future climate over the greater Los Angeles region under different scenarios of greenhouse gas emissions." (Published December 31, 2015)
Source: University of California, Los Angeles
Climate Change Topics: California: Statewide / Precipitation, Extreme Weather / Temperature / Water supply, changes in supply, snowpack /
(Posted December 1, 2016)

 

Safeguarding California: CA's Natural Resources Secretary on Resiliency & Climate Change Plans

News article Safeguarding California: CA's Natural Resources Secretary on Resiliency & Climate Change Plans (Published November 29, 2016)
Source: Planning Report
Climate Change Topics: Adaptation / California: Bay Area and Delta / California: Statewide / Energy management and conservation / Sea level rise / Water supply, changes in supply, snowpack /
(Posted November 30, 2016)

 

Significant and inevitable end-of-21st-century advances in surface runoff timing in California's Sierra Nevada

Report Significant and inevitable end-of-21st-century advances in surface runoff timing in California's Sierra Nevada - "Key points: 1. End-of-21st-century near-surface warming leads to statistically significant advances in surface runoff timing in the Sierra Nevada Mountains for all plausible forcing scenarios and all GCMs. Thus a detectable change in runoff timing is inevitable. 2. The 2000-2750m elevation band is associated with the greatest runoff timing advances, due in large part to snow albedo feedback. 3. Even when greenhouse gas emissions are curtailed, the runoff change is still climatically significant when compared to natural variability. If greenhouse gas emissions continue unabated, a truly dramatic change in surface hydrology is anticipated." (Schwartz, M., et al., 2016) (Published November 21, 2016)
Source: University of California, Los Angeles
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted November 30, 2016)

 

Anthropogenic Warming Impacts on California Snowpack During Drought

Report Anthropogenic Warming Impacts on California Snowpack During Drought - "Sierra Nevada climate and snowpack is simulated during the period of extreme drought from 2011 to 2015 and compared to an identical simulation except for the removal of 20th century anthropogenic warming. Anthropogenic warming reduced average snowpack levels by 25%, with mid-to-low elevations experiencing reductions between 26-43%. In terms of event frequency, return periods associated with anomalies in 4-year April 1 SWE are estimated to have doubled, and possibly quadrupled, due to past warming. We also estimate effects of future anthropogenic warmth on snowpack during a drought similar to that of 2011-2015. Further snowpack declines of 60-85% are expected, depending on emissions scenario. The return periods associated with future snowpack levels are estimated to range from millennia to much longer. Therefore, past human emissions of greenhouse gases are already negatively impacting statewide water resources, and much more severe impacts are likely to be inevitable." (Berg, N. and Hall, A., 2016) (Published November 25, 2016)
Source: University of California, Los Angeles
Climate Change Topics: California: Statewide / Drought / Water supply, changes in supply, snowpack /
(Posted November 30, 2016)

 

Sierra snowpack could drop 50% by the end of the century due to climate change

News article Sierra snowpack could drop 50% by the end of the century due to climate change
Related Link: http://research.atmos.ucla.edu/csrl/publications/Hall/Schwartz_sfcrunoff_timing_submitted.pdf
(Published November 28, 2016)
Source: Southern California Public Radio
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted November 29, 2016)

 

Building resilience to climate change one landscape at a time

News article Building resilience to climate change one landscape at a time (Published November 17, 2016)
Source: U.S. National Oceanic and Atmospheric Administration
Climate Change Topics: Adaptation / Ecosystems, Habitat, Threatened Species /
(Posted November 28, 2016)

 

Trump Has Options for Undoing Obama's Climate Legacy

News article Trump Has Options for Undoing Obama's Climate Legacy (Published November 27, 2016)
Source: New York Times
Climate Change Topics: Federal Regulations, EPA, Clean Air Act / Greenhouse gas (GHG) reduction, mitigation / Politics, laws, United Nations, etc. /
(Posted November 28, 2016)

 

Building the Future of Water and Energy in California (Opinion)

News article Building the Future of Water and Energy in California (Opinion) (Published November 23, 2016)
Source: Water Deeply
Climate Change Topics: Energy management and conservation / Water utilities guidance /
(Posted November 23, 2016)

 

EPA Aims to Finish Climate Rules; Decisions Fall to Trump (and other regulations)

News article EPA Aims to Finish Climate Rules; Decisions Fall to Trump (and other regulations) (Published November 17, 2016)
Source: Bloomberg BNA
Climate Change Topics: Federal Regulations, EPA, Clean Air Act / Greenhouse gas (GHG) reduction, mitigation /
(Posted November 23, 2016)

 

Get used to heat records; study predicts far more in future

News article Get used to heat records; study predicts far more in future
Related Link: http://www.pnas.org/content/early/2016/11/15/1606117113.abstract
(Published November 22, 2016)
Source: Associated Press
Climate Change Topics: Temperature /
(Posted November 22, 2016)

 

US daily temperature records past, present, and future

Report US daily temperature records past, present, and future - "Future changes in temperature extremes over the continental United States are represented by the ratio of daily record high maximum temperatures to daily record low minimum temperatures and computed as a function of mean temperature increase that does not depend on scenario. A nonlinear empirical fit of the relation between this ratio and average temperature, using observations from 1930 to 2015, is extended to 2100 and compared with the climate model projections. The projections of the ratio are somewhat higher than the empirical projection from observations, continuing a positively biased trend in daily record high temperatures in the 20th century in the models, which we link to less-than-observed summer precipitation and evapotranspiration." (Meehl, G. A., et al., 2016, Proceedings of the National Academy of Sciences) (Published November 21, 2016)
Climate Change Topics: Temperature /
(Posted November 22, 2016)

 

Stormwater Management Importance Underscored in Los Angeles Basin Study Released by Bureau of Reclamation

News article Stormwater Management Importance Underscored in Los Angeles Basin Study Released by Bureau of Reclamation
Related Link: http://www.usbr.gov/watersmart/bsp/docs/fy2017/LABasinStudySummaryReport.pdf
(Published November 17, 2016)
Source: U.S. Bureau of Reclamation
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted November 21, 2016)

 

Rising Reality: Bay Area's answer to sea level rise a battle on many fronts

News article Rising Reality: Bay Area's answer to sea level rise a battle on many fronts (Published November 19, 2016)
Source: San Francisco Chronicle
Climate Change Topics: Adaptation / California: Bay Area and Delta / Flooding / Sea level rise /
(Posted November 21, 2016)

 

6 Feet of Sea Level Rise? VR Shows How it Might Look in Santa Monica

News article 6 Feet of Sea Level Rise? VR Shows How it Might Look in Santa Monica (Published November 17, 2016)
Source: KQED Radio
Climate Change Topics: California: Statewide / Flooding / Sea level rise /
(Posted November 18, 2016)

 

High-tech sensors monitor ecosystems in climate change research program

News article High-tech sensors monitor ecosystems in climate change research program (Published October 21, 2016)
Source: UC Santa Cruz
Climate Change Topics: California: Statewide / Ecosystems, Habitat, Threatened Species /
(Posted November 17, 2016)

 

Pacific coast marshes more resistant to rising seas than Atlantic

News article Pacific coast marshes more resistant to rising seas than Atlantic (Published November 15, 2016)
Source: U.S. National Oceanic and Atmospheric Administration
Climate Change Topics: California: Statewide / Ecosystems, Habitat, Threatened Species / Sea level rise /
(Posted November 17, 2016)

 

Causes of extreme ridges that induce California droughts

Report Causes of extreme ridges that induce California droughts - "California droughts are often caused by high-amplitude and persistent ridges near and off the west coast without apparent connections with ENSO. Here with a hierarchy of climate models, we demonstrate that extreme ridges in this region are associated with a continuum of zonal wavenumber-5 circumglobal teleconnection patterns that originate from midlatitude atmospheric internal dynamics. Although tropical diabatic heating anomalies are not essential to the formation and maintenance of these wave patterns, certain persistent heating anomalies may double the probability of ridges with amplitudes in the 90th percentile occurring on interannual time scales. Those heating anomalies can be caused by either natural variability or possibly by climate change and they do not necessarily depend on ENSO. The extreme ridges that occurred during the 2013/2014 and 2014/2015 winters could be examples of ridges produced by heating anomalies that are not associated with ENSO. This mechanism could provide a source of subseasonal-to-interannual predictability, beyond the predictability provided by ENSO." (Teng, H., 2016, Journal of Climate) (Published November 1, 2016)
Climate Change Topics: California: Statewide / Drought /
(Posted November 16, 2016)

 

Will Trump end California's climate rules?

News article Will Trump end California's climate rules? (Published November 14, 2016)
Source: San Jose Mercury News
Climate Change Topics: AB 32 / California: Statewide / Federal Regulations, EPA, Clean Air Act / Politics, laws, United Nations, etc. /
(Posted November 14, 2016)

 

Salmon, Climate Change Cast Doubt on Future of Dams

News article Salmon, Climate Change Cast Doubt on Future of Dams (Published November 11, 2016)
Source: Water Deeply
Climate Change Topics: Dams and reservoirs /
(Posted November 14, 2016)

 

Coastal sea level rise with warming above 2 degrees C

Report Coastal sea level rise with warming above 2 degrees C - "Warming of 2 degrees C will lead to an average global ocean rise of 20 cm, but more than 90% of coastal areas will experience greater rises. If warming continues above 2 degrees C, then, by 2100, sea level will be rising faster than at any time during human civilization, and 80% of the global coastline is expected to exceed the 95th percentile upper limit of 1.8 m for mean global ocean sea level rise. Coastal communities, notably rapidly expanding cities in the developing world; small island states; United Nations Educational, Scientific and Cultural Organization Cultural World Heritage sites; and vulnerable tropical coastal ecosystems will have a very limited time after midcentury to adapt to these rises." (Jevrejeva, S., 2016, Proceedings of the National Academy of Sciences) (Published November 7, 2016)
Climate Change Topics: Sea level rise /
(Posted November 14, 2016)

 

Why scientists are so worried about sea-level rise in the second half of this century

News article Why scientists are so worried about sea-level rise in the second half of this century
Related Link: http://www.pnas.org/content/early/2016/11/02/1605312113
(Published November 7, 2016)
Source: Washington Post
Climate Change Topics: Sea level rise /
(Posted November 10, 2016)

 

States May Drive U.S. Climate Policy Under Trump

News article States May Drive U.S. Climate Policy Under Trump (Published November 10, 2016)
Source: KQED Radio
Climate Change Topics: Federal Regulations, EPA, Clean Air Act / Politics, laws, United Nations, etc. /
(Posted November 10, 2016)

 

Will Paris climate accord and other environmental pacts survive a Trump presidency?

News article Will Paris climate accord and other environmental pacts survive a Trump presidency? (Published November 10, 2016)
Source: Los Angeles Times
Climate Change Topics: Federal Regulations, EPA, Clean Air Act / Greenhouse gas (GHG) reduction, mitigation /
(Posted November 10, 2016)

 

Climate Experts Weigh in on Trump's Election Win

News article Climate Experts Weigh in on Trump's Election Win (Published November 9, 2016)
Source: KQED Radio
Climate Change Topics: Federal Regulations, EPA, Clean Air Act / Politics, laws, United Nations, etc. /
(Posted November 10, 2016)

 

Isotopic signature of extreme precipitation events in the western U.S. and associated phases of Arctic and tropical climate modes

Report Isotopic signature of extreme precipitation events in the western U.S. and associated phases of Arctic and tropical climate modes - "Extreme precipitation events, commonly associated with 'Atmospheric Rivers,' are projected to increase in frequency and severity in western North America; however, the intensity and landfall position are difficult to forecast accurately. As the isotopic signature of precipitation has been widely utilized as a tracer of the hydrologic cycle and could potentially provide information about key physical processes, we utilize both climate and precipitation isotope data to investigate these events in California from 2001 to 2011. Although individual events have extreme isotopic signatures linked to associated circulation anomalies, the composite across all events unexpectedly resembles the weighted mean for the entire study period, reflecting diverse moisture trajectories and associated teleconnection phases. We document that 90% of events reaching this location occurred during the negative Arctic Oscillation, suggesting a possible link with higher-latitude warming. We also utilize precipitation data of extreme precipitation events across the entire western U.S. to investigate the relationships between key tropical and Arctic climate modes known to influence precipitation in this region. Results indicate that the wettest conditions occur when the negative Arctic Oscillation, negative Pacific/North American pattern, and positive Southern Oscillation are in sync and that precipitation has increased in the southwestern U.S. and decreased in the northwestern U.S. relative to this phase combination's 1979-2011 climatology. Furthermore, the type of El Nino-Southern Oscillation event, Central Pacific or Eastern Pacific, influences the occurrence, landfall location, and isotopic composition of precipitation." (McCabe-Glynn, S., 2016, Journal of Geophysical Research) (Published August 23, 2016)
Climate Change Topics: California: Statewide / Precipitation, Extreme Weather /
(Posted November 9, 2016)

 

California Jurisdictions Addressing Climate Change

Report California Jurisdictions Addressing Climate Change - California cities and counties that have made climate action plans, GHG reduction plans, or other plans, with links. (Updated 2016) (Published March 16, 2016)
Source: California. Governor's Office of Planning and Research
Climate Change Topics: California: Statewide / Greenhouse gas (GHG) reduction, mitigation / Sample Climate Action Plans /
(Posted November 8, 2016)

 

Climate Adaptation Planning Builds Water Utility Resilience

Report Climate Adaptation Planning Builds Water Utility Resilience - "Climate change and extreme weather events can pose significant challenges for drinking water, wastewater, and stormwater utilities. The US Environmental Protection Agency has developed an array of customizable software tools for understanding and assessing threats related to climate change to help utilities prepare for and be more resilient to such challenges." (Dubin, L., 2015, Opflow) (Published March 1, 2015)
Climate Change Topics: Adaptation / Models and Tools / Precipitation, Extreme Weather / Water supply, changes in supply, snowpack / Water utilities guidance /
(Posted November 8, 2016)

 

Opportunities to Enhance the Nation's Resilience to Climate Change

Report Opportunities to Enhance the Nation's Resilience to Climate Change - Federal efforts in 1. Advancing and applying science-based information, technology, and tools to address climate risk; 2. Integrating climate resilience into Federal agency missions, operations, and culture; and 3. Supporting community efforts to enhance climate resilience. (Published October 31, 2016)
Source: United States. White House
Climate Change Topics: Adaptation / Federal Regulations, EPA, Clean Air Act /
(Posted November 8, 2016)

 

On the Colorado River, Climate Change is Water Change

News article On the Colorado River, Climate Change is Water Change (Published November 7, 2016)
Source: Water Deeply
Climate Change Topics: Drought / Streamflow / Temperature / Water supply, changes in supply, snowpack /
(Posted November 7, 2016)

 

The World Isn't Doing Enough to Slow Climate Change

News article The World Isn't Doing Enough to Slow Climate Change (Published November 4, 2016)
Source: KQED Radio
Climate Change Topics: Global issues, human impacts / Greenhouse gas (GHG) reduction, mitigation / Temperature /
(Posted November 7, 2016)

 

Effects of climate change on tidal marshes along a latitudinal gradient in California

Report Effects of climate change on tidal marshes along a latitudinal gradient in California - "The coastal region of California supports a wealth of ecosystem services including habitat provision for wildlife and fisheries. Tidal marshes, mudflats, and shallow bays within coastal estuaries link marine, freshwater and terrestrial habitats, and provide economic and recreational benefits to local communities. Climate change effects such as sea-level rise (SLR) are altering these habitats, but we know little about how these areas will change over the next 50–100 years. Our study examined the projected effects of three recent SLR scenarios produced for the West Coast of North America on tidal marshes in California. We compiled physical and biological data, including coastal topography, tidal inundation, plant composition, and sediment accretion to project how SLR may alter these ecosystems in the future. The goal of our research was to provide results that support coastal management and conservation efforts across California. Under a low SLR scenario, all study sites remained vegetated tidal wetlands, with most sites showing little elevation and vegetation change relative to sea level. At most sites, mid SLR projections led to increases in low marsh habitat at the expense of middle and high marsh habitat. . . . Under a high SLR scenario, most sites were projected to lose vegetated habitat, eventually converting to intertidal mudflats. Our results suggest that California marshes are vulnerable to major habitat shifts under mid or high rates of SLR, especially in the latter part of the century. Loss of vegetated tidal marshes in California due to SLR is expected to impact ecosystem services that are dependent on coastal wetlands such as wildlife habitat, carbon sequestration, improved water quality, and coastal protection from storms." (Open-File Report 2016-1125) (Published August 5, 2016)
Source: United States. Geological Survey
Climate Change Topics: California: Statewide / Ecosystem Services and Climate Change / Ecosystems, Habitat, Threatened Species / Sea level rise /
(Posted November 4, 2016)

 

Urgency, But No Easy Answers, in Effort to Counter Sea-Level Rise

News article Urgency, But No Easy Answers, in Effort to Counter Sea-Level Rise (Published November 2, 2016)
Source: Courthouse News Service
Climate Change Topics: California: Bay Area and Delta / Sea level rise /
(Posted November 3, 2016)

 

Past Climates Provide a Roadmap to the Future

News article Past Climates Provide a Roadmap to the Future (Published October 28, 2016)
Source: U.S. Geological Survey
Climate Change Topics: Research /
(Posted November 3, 2016)

 

Acting Locally to Address Sea Level Rise

News article Acting Locally to Address Sea Level Rise (Published November 2, 2016)
Source: Public Policy Institute of California
Climate Change Topics: Adaptation / California: Statewide / Sea level rise /
(Posted November 2, 2016)

 

Interlinking climate change with water-energy-food nexus and related ecosystem processes in California case studies

Report Interlinking climate change with water-energy-food nexus and related ecosystem processes in California case studies - "Global climate change creates critical challenges with increasing temperature, reducing snowpack, and changing precipitation for water, energy, and food, as well as ecosystem processes at regional scales. Ecosystem services provide life support, goods, and natural resources from water, energy, and food, as well as the environments. There are knowledge gaps from the lack of conceptual framework and practices to interlink major climate change drivers of water resources with water-energy-food nexus and related ecosystem processes. This paper provided an overview of research background, developed a conceptual framework to bridge these knowledge gaps, summarized California case studies for practices in cross sector ecosystem services, and identified future research needs. In this conceptual framework, climate change drivers of changing temperature, snowpack, and precipitation are interlinked with life cycles in water, energy, food, and related key elements in ecosystem processes. Case studies in California indicated climate change affected variation in increasing temperature and changing hydrology at the regional scales. A large variation in average energy intensity values was also estimated from ground water and federal, state, and local water supplies both within each hydrological region and among the ten hydrological regions in California. The increased regional temperature, changes in snowpack and precipitation, and increased water stresses from drought can reduce ecosystem services and affect the water and energy nexus and agricultural food production, as well as fish and wildlife habitats in the Sacramento-San Joaquin Delta (Delta) and Central Valley watersheds. Regional decisions and practices in integrated management of water, energy, food, and related ecosystem processes are essential to adapt and mitigate global climate change impacts at the regional scales. Science and policy support for interdisciplinary research are critical to develop the database and tools for comprehensive analysis to fill knowledge gaps and address ecosystem service complexity, the related natural resource investment, and integrated planning needs." (Liu, Q., 2016, Ecological Processes) (Published September 29, 2016)
Source: California. Dept. of Water Resources
Climate Change Topics: California: Statewide / Ecosystems, Habitat, Threatened Species / Energy management and conservation /
(Posted November 2, 2016)

 

Perspectives on the causes of exceptionally low 2015 snowpack in the western United States

Report Perspectives on the causes of exceptionally low 2015 snowpack in the western United States - "Augmenting previous papers about the exceptional 2011-2015 California drought, we offer new perspectives on the 'snow drought' that extended into Oregon in 2014 and Washington in 2015. Over 80% of measurement sites west of 115 degrees W experienced record low snowpack in 2015, and we estimate a return period of 400-1000 years for California's snowpack under the questionable assumption of stationarity. Hydrologic modeling supports the conclusion that 2015 was the most severe on record by a wide margin. Using a crowd-sourced superensemble of regional climate model simulations, we show that both human influence and sea surface temperature (SST) anomalies contributed strongly to the risk of snow drought in Oregon and Washington: the contribution of SST anomalies was about twice that of human influence. By contrast, SSTs and humans appear to have played a smaller role in creating California's snow drought. In all three states, the anthropogenic effect on temperature exacerbated the snow drought." (Mote, P. W., et al., 2016, Geophysical Research Letters) (Published October 31, 2016)
Climate Change Topics: California: Statewide / Drought / Water supply, changes in supply, snowpack /
(Posted November 2, 2016)

 

Study blames low 2015 Western snowpack on high temperatures

News article Study blames low 2015 Western snowpack on high temperatures
Related Link: http://onlinelibrary.wiley.com/doi/10.1002/2016GL069965/full
(Published November 1, 2016)
Source: San Jose Mercury News
Climate Change Topics: California: Statewide / Temperature / Water supply, changes in supply, snowpack /
(Posted November 1, 2016)

 

Little Hoover Commission Explores Local Response to Climate Change

News article Little Hoover Commission Explores Local Response to Climate Change (Published October 27, 2016)
Source: Association of California Water Agencies
Climate Change Topics: Adaptation / California: Statewide / California: Water/Flood Protection Districts / Greenhouse gas (GHG) reduction, mitigation / Santa Clara Valley Water District / Sea level rise / Water supply, changes in supply, snowpack /
(Posted October 28, 2016)

 

Seafood's new normal: California's coastal ecosystem -- and the fisheries that depend on it -- are in the grip of a huge disruption

News article Seafood's new normal: California's coastal ecosystem -- and the fisheries that depend on it -- are in the grip of a huge disruption (Published October 28, 2016)
Source: San Francisco Chronicle
Climate Change Topics: California: Statewide / Ecosystems, Habitat, Threatened Species /
(Posted October 28, 2016)

 

Climate-change ruling for Arctic seals has ramifications across U.S., California

News article Climate-change ruling for Arctic seals has ramifications across U.S., California (Published October 26, 2016)
Source: Sacramento Bee
Climate Change Topics: Ecosystems, Habitat, Threatened Species /
(Posted October 26, 2016)

 

Scientists just showed what it truly means when a huge Antarctic glacier is unstable

News article Scientists just showed what it truly means when a huge Antarctic glacier is unstable (Published October 26, 2016)
Source: Washington Post
Climate Change Topics: Sea and Polar ice /
(Posted October 26, 2016)

 

Greenhouse Gas Emissions from Reservoir Water Surfaces: A New Global Synthesis

Report Greenhouse Gas Emissions from Reservoir Water Surfaces: A New Global Synthesis - "Collectively, reservoirs created by dams are thought to be an important source of greenhouse gases (GHGs) to the atmosphere. So far, efforts to quantify, model, and manage these emissions have been limited by data availability and inconsistencies in methodological approach. Here, we synthesize reservoir CH4, CO2, and N2O emission data with three main objectives: (1) to generate a global estimate of GHG emissions from reservoirs, (2) to identify the best predictors of these emissions, and (3) to consider the effect of methodology on emission estimates. We estimate that GHG emissions from reservoir water surfaces account for 0.8 (0.5-1.2) Pg CO2 equivalents per year, with the majority of this forcing due to CH4. We then discuss the potential for several alternative pathways such as dam degassing and downstream emissions to contribute significantly to overall emissions. Although prior studies have linked reservoir GHG emissions to reservoir age and latitude, we find that factors related to reservoir productivity are better predictors of emission." (Deemer, B. R., et al., 2016, BioScience) (Published October 5, 2016)
Climate Change Topics: Dams and reservoirs / Greenhouse gas (GHG) increases /
(Posted October 26, 2016)

 

Characterizing Risk in Climate Change Assessments: Proceedings of a Workshop

Report Characterizing Risk in Climate Change Assessments: Proceedings of a Workshop - The National Academies were asked "to conduct a workshop to explore ways to frame the [National Climate Assement, 4th edition] and subsequent NCA reports in terms of risks to society. The workshop was intended to collect experienced views on how to characterize and communicate information about climate-related hazards, risks, and opportunities that will support decision makers in their efforts to reduce greenhouse gas emissions, reduce vulnerability to likely changes in climate, and increase resilience to those changes." (Published September 18, 2016)
Source: National Academies
Climate Change Topics: Adaptation / Flooding / Global issues, human impacts / Sea level rise /
(Posted October 26, 2016)

 

Species may be listed as threatened based on climate change projections, court says

News article Species may be listed as threatened based on climate change projections, court says (Published October 25, 2016)
Source: Los Angeles Times
Climate Change Topics: Ecosystems, Habitat, Threatened Species /
(Posted October 25, 2016)

 

Study: Reservoirs a 'Significant' Contributor to Climate Change

News article Study: Reservoirs a 'Significant' Contributor to Climate Change
Related Link: http://bioscience.oxfordjournals.org/content/early/2016/10/02/biosci.biw117
(Published October 25, 2016)
Source: Water Deeply
Climate Change Topics: Dams and reservoirs / Greenhouse gas (GHG) increases /
(Posted October 25, 2016)

 

Revised Guidance for Treatment of Climate Change in NMFS Endangered Species Act Decisions

Report Revised Guidance for Treatment of Climate Change in NMFS Endangered Species Act Decisions - Guidance for National Marine Fisheries Service staff on 1. consideration of future climate condition uncertainty, 2. selecting a climate change projection timeframe, 3. evaluating the adequacy of existing regulatory mechanisms to reduce greenhouse gas emissions, 4. critical habitat designation in a changing climate, 5. consideration of future beneficial effects, 6. responsiveness and effectiveness of management actions in a changing climate, and 7. incorporating climate change into project designs. (Published June 17, 2016)
Source: United States. National Oceanic and Atmospheric Administration
Climate Change Topics: Ecosystems, Habitat, Threatened Species /
(Posted October 25, 2016)

 

Climate Change is Shaping California's Water Future: Watch Our New Webinar

News article Climate Change is Shaping California's Water Future: Watch Our New Webinar (Published October 24, 2016)
Source: Union of Concerned Scientists
Climate Change Topics: California: Statewide / Groundwater / Water supply, changes in supply, snowpack /
(Posted October 24, 2016)

 

NMFS Adopts New Guidance for Incorporating Climate Change into ESA Decisions

News article NMFS Adopts New Guidance for Incorporating Climate Change into ESA Decisions (Published October 18, 2016)
Source: Somach, Simmons, and Dunn
Climate Change Topics: Ecosystems, Habitat, Threatened Species /
(Posted October 21, 2016)

 

Are California's Utilities Their Own Worst Drought Enemies?

News article Are California's Utilities Their Own Worst Drought Enemies? (Published October 11, 2016)
Source: Water Online
Climate Change Topics: California: Statewide / Greenhouse gas (GHG) increases / Water utilities guidance /
(Posted October 13, 2016)

 

Is using less water the secret to cutting our greenhouse gas emissions?

News article Is using less water the secret to cutting our greenhouse gas emissions? (Published October 12, 2016)
Source: Guardian (U.K.)
Climate Change Topics: Greenhouse gas (GHG) reduction, mitigation / Water utilities guidance /
(Posted October 13, 2016)

 

Climate Change and the Delta

Report Climate Change and the Delta - Projected effects of climate change, including more evaporation, more floods and droughts, sea level rise. (Dettinger, M., et al., 2016, San Francisco Estuary and Watershed Science) (Published October 12, 2016)
Climate Change Topics: California: Bay Area and Delta / Drought / Flooding / Sea level rise / Water supply, changes in supply, snowpack /
(Posted October 12, 2016)

 

State agency to draw up plan for sea level rise in Bay Area

News article State agency to draw up plan for sea level rise in Bay Area (Published October 10, 2016)
Source: San Francisco Chronicle
Climate Change Topics: California: Bay Area and Delta / Sea level rise /
(Posted October 11, 2016)

 

Marin water district joins 'deep green' electricity plan

News article Marin water district joins 'deep green' electricity plan (Published October 8, 2016)
Source: Marin Independent-Journal
Climate Change Topics: California: Bay Area and Delta / California: Water/Flood Protection Districts / Community Choice Aggregation (CCA) / Energy management and conservation /
(Posted October 11, 2016)

 

New EPA Web Portal Helps Communities Prepare for Climate Change

News article New EPA Web Portal Helps Communities Prepare for Climate Change
Related Link: https://www.epa.gov/ARC-X
(Published October 6, 2016)
Source: U.S. Environmental Protection Agency
Climate Change Topics: Adaptation / Drought / Flooding /
(Posted October 7, 2016)

 

Adaptation services of floodplains and wetlands under transformational climate change

Report Adaptation services of floodplains and wetlands under transformational climate change - "Adaptation services are the ecosystem processes and services that benefit people by increasing their ability to adapt to change. . . . For example, ecosystem functions and services of floodplains depend on river flows. In those regions of the world where climate change projections are for hotter, drier conditions, floods will be less frequent and floodplains will either persist, though with modified structure and function, or transform to terrestrial (flood-independent) ecosystems. Many currently valued ecosystem services will reduce in supply or become unavailable, but new options are provided by adaptation services. We present a case study from the Murray–Darling Basin, Australia, for operationalizing the adaptation services concept for floodplains and wetlands. We found large changes in flow and flood regimes are likely under a scenario of +1.6 degrees C by 2030, even with additional water restored to rivers under the proposed Murray–Darling Basin Plan. We predict major changes to floodplain ecosystems, including contraction of riparian forests and woodlands and expansion of terrestrial, drought-tolerant vegetation communities. Examples of adaptation services under this scenario include substitution of irrigated agriculture with dryland cropping and floodplain grazing; mitigation of damage from rarer, extreme floods; and increased tourism, recreational, and cultural values derived from fewer, smaller wetlands that can be maintained with environmental flows. Management for adaptation services will require decisions on where intervention can enable ecosystem persistence and where transformation is inevitable. New ways of managing water that include consideration of the increasing importance of adaptation services requires major changes to decision-making that better account for landscape heterogeneity and large-scale change rather than attempting to maintain ecosystems in fixed states." (Colloff, M. J., et al., 2016, Ecological Applications) (Published June 8, 2016)
Climate Change Topics: Adaptation / Ecosystem Services and Climate Change / Flooding /
(Posted October 7, 2016)

 

The Southwest Will Probably Suffer a Crippling Megadrought This Century

News article The Southwest Will Probably Suffer a Crippling Megadrought This Century
Related Link: http://advances.sciencemag.org/content/2/10/e1600873
(Published October 5, 2016)
Source: Popular Mechanics
Climate Change Topics: Drought /
(Posted October 6, 2016)

 

Climate Change Adaptation Resource Center (ARC-X)

Report Climate Change Adaptation Resource Center (ARC-X) - "An interactive resource to help local governments effectively deliver services to their communities even as the climate changes. Decision makers can create an integrated package of information tailored specifically to their needs. Once users select areas of interest, they will find information about: the risks posed by climate change to the issues of concern; relevant adaptation strategies; case studies illustrating how other communities have successfully adapted to those risks and tools to replicate their successes; and EPA funding opportunities." (Published )
Source: United States. Environmental Protection Agency
Climate Change Topics: Adaptation / Drought / Ecosystems, Habitat, Threatened Species / Flooding / Precipitation, Extreme Weather / Sea level rise / Water quality / Water utilities guidance /
(Posted October 6, 2016)

 

Designing Infrastructure with Climate Change in Mind: Assembly Bill 2800 Becomes Law

News article Designing Infrastructure with Climate Change in Mind: Assembly Bill 2800 Becomes Law (Published October 4, 2016)
Source: Union of Concerned Scientists
Climate Change Topics: California: Statewide / Water utilities guidance /
(Posted October 5, 2016)

 

California's Water

Report California's Water - Updated report on water issues. (October 2016) (Published October 4, 2016)
Source: Public Policy Institute of California
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted October 5, 2016)

 

Tectonic Subsidence of California Estuaries Increases Forecasts of Relative Sea-Level Rise

Report Tectonic Subsidence of California Estuaries Increases Forecasts of Relative Sea-Level Rise - "Even along the generally uplifting coast of the Pacific US, local geologic structures can cause subsidence. In this study, we quantify Holocene-averaged subsidence rates in four estuaries (Carpinteria Slough, Goleta Slough, Campus Lagoon, and Morro Bay) along the southern and central California coast by comparing radiocarbon-dated estuarine material to a regional sea-level curve. Holocene-averaged rates of vertical motion range from subsidence of 1.4 plus or minus 2.4, 1.2 plus or minus 0.4, and 0.4 plus or minus 0.3 mm/year in Morro Bay, Carpinteria Slough, and Goleta Slough, respectively, to possible uplift in Campus Lagoon (-0.1 plus or minus 0.9 mm/year). The calculated rates of subsidence are of the same magnitude as rates of relative sea-level rise experienced over the late Holocene and effectively double the ongoing rates of relative sea-level rise experienced over the last five decades on other parts of the coast. The difference in rates of vertical motion among these four estuaries is attributed to their geological settings. Estuaries developed in subsiding geological structures such as synclines and fault-bounded basins are subsiding at much higher rates than those developed within flooded river valleys incised into marine terraces. Restoration projects accounting for future sea-level rise must consider the geologic setting of the estuaries and, if applicable, include subsidence in future sea-level rise scenarios, even along the tectonically uplifting US Pacific Coast." (Simms, A., et al., 2016, Estuaries and Coasts) (Published May 11, 2016)
Climate Change Topics: California: Statewide / Ecosystems, Habitat, Threatened Species / Sea level rise /
(Posted October 5, 2016)

 

Partnership for Resilience and Preparedness

Report Partnership for Resilience and Preparedness - Data gathered from public and private sources, including downscaled temperature and precipitation projections and drought and flood data. Includes Sonoma County Water Agency's climate resilience dashboard. (Published September 22, 2016)
Source: United States.
Climate Change Topics: California: Water/Flood Protection Districts / Flooding / Models and Tools / Precipitation, Extreme Weather / Temperature / Water supply, changes in supply, snowpack /
(Posted October 5, 2016)

 

Relative impacts of mitigation, temperature, and precipitation on 21st-century megadrought risk in the American Southwest

Report Relative impacts of mitigation, temperature, and precipitation on 21st-century megadrought risk in the American Southwest - "Megadroughts are comparable in severity to the worst droughts of the 20th century but are of much longer duration. A megadrought in the American Southwest would impose unprecedented stress on the limited water resources of the area, making it critical to evaluate future risks not only under different climate change mitigation scenarios but also for different aspects of regional hydroclimate. We find that changes in the mean hydroclimate state, rather than its variability, determine megadrought risk in the American Southwest. Estimates of megadrought probabilities based on precipitation alone tend to underestimate risk. Furthermore, business-as-usual emissions of greenhouse gases will drive regional warming and drying, regardless of large precipitation uncertainties. We find that regional temperature increases alone push megadrought risk above 70, 90, or 99% by the end of the century, even if precipitation increases moderately, does not change, or decreases, respectively. Although each possibility is supported by some climate model simulations, the latter is the most common outcome for the American Southwest in Coupled Model Intercomparison 5 generation models. An aggressive reduction in global greenhouse gas emissions cuts megadrought risks nearly in half." (Ault, T. R., et al., 2016, Science Advances) (Published October 5, 2016)
Climate Change Topics: Drought /
(Posted October 5, 2016)

 

New tool helps urban communities build resilience to climate change

News article New tool helps urban communities build resilience to climate change (Published September 30, 2016)
Source: U.S. National Oceanic and Atmospheric Administration
Climate Change Topics: Land Use, environmental management systems, and regulation /
(Posted October 4, 2016)

 

Oh great -- scientists just confirmed a key new source of greenhouse gases

News article Oh great -- scientists just confirmed a key new source of greenhouse gases (Published September 29, 2016)
Source: Washington Post
Climate Change Topics: Dams and reservoirs /
(Posted September 29, 2016)

 

The World's Water Reservoirs Produce More Greenhouse Gas Than All Of Canada

News article The World's Water Reservoirs Produce More Greenhouse Gas Than All Of Canada (Published September 28, 2016)
Source: Popular Science
Climate Change Topics: Dams and reservoirs /
(Posted September 28, 2016)

 

Mission Bay may need tidal barriers, huge levees as sea rises

News article Mission Bay may need tidal barriers, huge levees as sea rises (Published September 27, 2016)
Source: San Francisco Chronicle
Climate Change Topics: California: Bay Area and Delta / Flooding / Sea level rise /
(Posted September 27, 2016)

 

Hayward area marshlands endangered by climate change: Permit delays inhibiting key levee fixes, park leaders say

News article Hayward area marshlands endangered by climate change: Permit delays inhibiting key levee fixes, park leaders say (Published September 23, 2016)
Source: East Bay Times
Climate Change Topics: California: Bay Area and Delta / Ecosystems, Habitat, Threatened Species / Sea level rise /
(Posted September 23, 2016)

 

Atmospheric rivers come into focus with high-res climate model

News article Atmospheric rivers come into focus with high-res climate model (Published September 19, 2016)
Source: Science Daily
Climate Change Topics: Models and Tools / Precipitation, Extreme Weather /
(Posted September 21, 2016)

 

Extreme hydrological changes in the southwestern US drive reductions in water supply to Southern California by mid century

Report Extreme hydrological changes in the southwestern US drive reductions in water supply to Southern California by mid century - "The Southwestern United States has a greater vulnerability to climate change impacts on water security due to a reliance on snowmelt driven imported water. The State of California, which is the most populous and agriculturally productive in the United States, depends on an extensive artificial water storage and conveyance system primarily for irrigated agriculture, municipal and industrial supply and hydropower generation. Here we take an integrative high-resolution ensemble modeling approach to examine near term climate change impacts on all imported and local sources of water supply to Southern California. While annual precipitation is projected to remain the same or slightly increase, rising temperatures result in a shift towards more rainfall, reduced cold season snowpack and earlier snowmelt. Associated with these hydrological changes are substantial increases in the frequency and the intensity of both drier conditions and flooding events. The 50 year extreme daily maximum precipitation and runoff events are 1.5–6 times more likely to occur depending on the water supply basin. Simultaneously, a clear deficit in total annual runoff over mountainous snow generating regions like the Sierra Nevada is projected. On one hand, the greater probability of drought decreases imported water supply availability. On the other hand, earlier snowmelt and significantly stronger winter precipitation events pose increased flood risk requiring water releases from control reservoirs, which may potentially decrease water availability outside of the wet season. Lack of timely local water resource expansion coupled with projected climate changes and population increases may leave the area in extended periods of shortages." (Pagan, B., et al., 2016, Environmental Research Letters) (Published September 21, 2016)
Climate Change Topics: California: Statewide / Flooding / Precipitation, Extreme Weather / Water supply, changes in supply, snowpack /
(Posted September 21, 2016)

 

Think California's current drought is bad? Past incarnations have lasted hundreds of years

News article Think California's current drought is bad? Past incarnations have lasted hundreds of years (Published September 20, 2016)
Source: Washington Post
Climate Change Topics: California: Statewide / Drought /
(Posted September 20, 2016)

 

Climate Change Analysis on Extreme Precipitation over Three Watersheds in Northern California Based on 137-Year Long-Term Dynamical Downscaling

Report Climate Change Analysis on Extreme Precipitation over Three Watersheds in Northern California Based on 137-Year Long-Term Dynamical Downscaling - "Long-term historical precipitation over Northern California was reconstructed for 137 water years from October, 1871 through September, 2008 by dynamical downscaling based on NOAA Twentieth Century Reanalysis version 2 (20CRv2). The annual maximum values of 6-, 12-, 24-, 48-, 72-, and 96-hour basin-average precipitation were obtained from the reconstructed results for three watersheds in Northern California; American River watershed, Yuba River watershed, and Upper Feather River watershed. The reconstructed results for 137 water years are long enough to conduct a moving window analysis. Then, the moving average of annual maximum basin-average precipitation for each duration is calculated based on a 50-year moving window to analyze the trend of annual maximum values of basin-average precipitation. The analysis shows a clear upward trend for the 50-year moving average over all the three watersheds." (Ishida, K., et al., 2015, World Environmental and Water Resources Congress) (Published May 21, 2015)
Source: University of California, Davis
Climate Change Topics: California: Statewide / Precipitation, Extreme Weather /
(Posted September 20, 2016)

 

Will climate change make California's droughts worse? A mountain lake offers clues

News article Will climate change make California's droughts worse? A mountain lake offers clues (Published September 16, 2016)
Source: Los Angeles Times
Climate Change Topics: California: Statewide / Drought /
(Posted September 19, 2016)

 

Atmospheric river landfall-latitude changes in future climate simulations

Report Atmospheric river landfall-latitude changes in future climate simulations - "The latitude of landfall for atmospheric rivers (ARs) is examined in the fully coupled half-degree version of the Community Climate System Model, version 4 (CCSM4) for warm future climate simulations. Two regions are examined: U.S. West Coast/North Pacific Ars and United Kingdom/North Atlantic Ars. Changes in AR landfall-latitude reflect changes in the atmospheric steering flow. West Coast U.S. Ars are projected to push equatorward in response to the subtropical jet climate change. UK AR response is dominated by eddy-driven jets and is seasonally dependent. UK simulated AR response is modest in the winter with the largest relative changes occurring in the seasonal transition months. Precipitation associated with Ars is also projected to increase in intensity under global warming. CCSM4 projects a marked shift to higher rainfall rates for Southern California. Small to modest rainfall rates may increase for all UK latitudes, for the Pacific Northwest, and central and northern California." (Shields, C. A. and J. T. Kiehl, 2016, Geophysical Research Letters) (Published September 13, 2016)
Climate Change Topics: California: Statewide / Precipitation, Extreme Weather /
(Posted September 19, 2016)

 

Outdated FEMA Flood Maps Don't Account For Climate Change

News article Outdated FEMA Flood Maps Don't Account For Climate Change (Published September 15, 2016)
Source: National Public Radio (NPR)
Climate Change Topics: Flooding /
(Posted September 15, 2016)

 

Global warming could make the drought last for a century, says UCLA study

News article Global warming could make the drought last for a century, says UCLA study
Related Link: http://www.nature.com/articles/srep33325
(Published September 15, 2016)
Source: San Gabriel Valley Tribune
Climate Change Topics: California: Statewide / Drought /
(Posted September 15, 2016)

 

Jerry Brown signs funding bill amid push to extend cap and trade

News article Jerry Brown signs funding bill amid push to extend cap and trade (Published September 15, 2016)
Source: Sacramento Bee
Climate Change Topics: AB 32 / California: Statewide / Greenhouse gas (GHG) reduction, mitigation /
(Posted September 15, 2016)

 

Green Infrastructure and Climate Change: Collaborating to Improve Community Resiliency

Report Green Infrastructure and Climate Change: Collaborating to Improve Community Resiliency - "In 2015, EPA convened charrettes, or intensive planning sessions, in four cities: Albuquerque, Grand Rapids, Los Angeles, and New Orleans, to explore the ways in which green infrastructure could help cities become more resilient to climate change." In Los Angeles, drought and watershed management were studied. In Albuquerque, flooding and water supply. (Published August 22, 2016)
Source: United States. Environmental Protection Agency
Climate Change Topics: Drought / Flooding / Water supply, changes in supply, snowpack /
(Posted September 15, 2016)

 

LOCA Statistical Downscaling (Localized Constructed Analogs)

Report LOCA Statistical Downscaling (Localized Constructed Analogs) - "LOCA is a statistical downscaling technique that uses past history to add improved fine-scale detail to global climate models. We have used LOCA to downscale 32 global climate models from the CMIP5 archive at a 1/16th degree spatial resolution, covering North America from central Mexico through Southern Canada. The historical period is 1950-2005, and there are two future scenarios available: RCP 4.5 and RCP 8.5 over the period 2006-2100 (although some models stop in 2099). The variables currently available are daily minimum and maximum temperature, and daily precipitation. Over the next year we will begin running the VIC hydrological model with the downscaled data, which will give many more variables, such as snow cover, soil moisture, runoff, and humidity, all at a 1/16th degree spatial resolution on a daily timescale." (Published September 12, 2016)
Source: United States. Geological Survey
Climate Change Topics: Models and Tools / Precipitation, Extreme Weather / Temperature / Water supply, changes in supply, snowpack /
(Posted September 15, 2016)

 

Simulating the Pineapple Express in the half degree Community Climate System Model, CCSM4

Report Simulating the Pineapple Express in the half degree Community Climate System Model, CCSM4 - "Atmospheric rivers are recognized as major contributors to the poleward transport of water vapor. Upon reaching land, these phenomena also play a critical role in extreme precipitation and flooding events. The Pineapple Express (PE) is defined as an atmospheric river extending out of the deep tropics and reaching the west coast of North America. Community Climate System Model (CCSM4) high-resolution ensemble simulations for the twentieth and 21st centuries are diagnosed to identify the PE. Analysis of the twentieth century simulations indicated that the CCSM4 accurately captures the spatial and temporal climatology of the PE. Analysis of the end 21st century simulations indicates a significant increase in storm duration and intensity of precipitation associated with landfall of the PE. Only a modest increase in the number of atmospheric rivers of a few percent is projected for the end of 21st century." (Shields, C. A. and J. T. Kiehl, 2016, Geophysical Research Letters) (Published August 16, 2016)
Climate Change Topics: California: Statewide / Precipitation, Extreme Weather /
(Posted September 15, 2016)

 

A spatially distributed model for assessment of the effects of changing land use and climate on urban stream quality

Report A spatially distributed model for assessment of the effects of changing land use and climate on urban stream quality - "While the effects of land use change in urban areas have been widely examined, the combined effects of climate and land use change on the quality of urban and urbanizing streams have received much less attention. We describe a modelling framework that is applicable to the evaluation of potential changes in urban water quality and associated hydrologic changes in response to ongoing climate and landscape alteration. The grid-based spatially distributed model, Distributed Hydrology Soil Vegetation Model-Water Quality (DHSVM-WQ), is an outgrowth of DHSVM that incorporates modules for assessing hydrology and water quality in urbanized watersheds at a high-spatial and high-temporal resolution. DHSVM-WQ simulates surface run-off quality and in-stream processes that control the transport of non-point source pollutants into urban streams. We configure DHSVM-WQ for three partially urbanized catchments in the Puget Sound region to evaluate the water quality responses to current conditions and projected changes in climate and/or land use over the next century. Here, we focus on total suspended solids (TSS) and total phosphorus (TP) from non-point sources (run-off), as well as stream temperature. . . . Our results show that urbanization has a much greater effect than climate change on both the magnitude and seasonal variability of streamflow, TSS and TP loads largely because of substantially increased streamflow and particularly winter flow peaks. Water temperature is more sensitive to climate warming scenarios than to urbanization and precipitation changes. Future urbanization and climate change together are predicted to significantly increase annual mean streamflow (up to 55%), water temperature (up to 1.9 degrees C), TSS load (up to 182%) and TP load (up to 74%)." (Sun, N., et al., 2016, Hydrological Processes) (Published August 22, 2016)
Climate Change Topics: Streamflow / Water quality /
(Posted September 15, 2016)

 

How Climate Change Mitigation and Energy Choices Affect Water (Opinion)

News article How Climate Change Mitigation and Energy Choices Affect Water (Opinion) (Published September 14, 2016)
Source: Water Deeply
Climate Change Topics: Energy management and conservation / Renewable energy / Water utilities guidance /
(Posted September 14, 2016)

 

Sea-Level Rise and U.S. Coasts: Science and Policy Considerations

Report Sea-Level Rise and U.S. Coasts: Science and Policy Considerations - "From 1901 to 2010, global sea levels rose an estimated 187 millimeters (mm; 7.4 inches), averaging a 1.7 mm (0.07 inch) rise annually. Estimates are that the annual rate rose to 3.2 mm (0.13 inches) from 1992 to 2010. Although the extent of future sea-level rise remains uncertain, sea-level rise is anticipated to have a range of effects on U.S. coasts. It is anticipated to contribute to flood and erosion hazards, permanent or temporary land inundation, saltwater intrusion into coastal freshwaters, and changes in coastal terrestrial and estuarine ecosystems. Some states, such as Florida and Louisiana, and U.S. territories have a considerable share of their assets, people, economies, and water supplies vulnerable to sea-level rise. In 2010, roughly 100 million people lived in U.S. coastal shoreline counties. Increased flood risk associated with sea-level rise may increase demand for federal disaster assistance and challenge the National Flood Insurance Program. Federal programs support local and state infrastructure investments such as roads, bridges, and municipal water facilities that may be damaged or impaired." (Sept. 2016) (Published September 12, 2016)
Source: United States. Congressional Research Service
Climate Change Topics: Flooding / Sea level rise /
(Posted September 14, 2016)

 

Prolonged California aridity linked to climate warming and Pacific sea surface temperature

Report Prolonged California aridity linked to climate warming and Pacific sea surface temperature - "California has experienced a dry 21st century capped by severe drought from 2012 through 2015 prompting questions about hydroclimatic sensitivity to anthropogenic climate change and implications for the future. We address these questions using a Holocene lake sediment record of hydrologic change from the Sierra Nevada Mountains coupled with marine sediment records from the Pacific. These data provide evidence of a persistent relationship between past climate warming, Pacific sea surface temperature (SST) shifts and centennial to millennial episodes of California aridity. The link is most evident during the thermal-maximum of the mid-Holocene (~8 to 3 ka; ka = 1,000 calendar years before present) and during the Medieval Climate Anomaly (MCA) (~1 ka to 0.7 ka). In both cases, climate warming corresponded with cooling of the eastern tropical Pacific despite differences in the factors producing increased radiative forcing. The magnitude of prolonged eastern Pacific cooling was modest, similar to observed La Nina excursions of 1 to 2 degrees C. Given differences with current radiative forcing it remains uncertain if the Pacific will react in a similar manner in the 21st century, but should it follow apparent past behavior more intense and prolonged aridity in California would result." (MacDonald, G., et al., 2016, Scientific Reports) (Published September 15, 2016)
Source: University of California, Los Angeles
Climate Change Topics: California: Statewide / Drought /
(Posted September 14, 2016)

 

Toxic Slime Spreads Across World's Oceans as Climate Disruption Continues Apace

News article Toxic Slime Spreads Across World's Oceans as Climate Disruption Continues Apace (Published September 12, 2016)
Source: TruthOut
Climate Change Topics: Water quality /
(Posted September 12, 2016)

 

5 Municipal-Industrial Water Issues Analyzed

News article 5 Municipal-Industrial Water Issues Analyzed (Published September 9, 2016)
Source: Water Online
Climate Change Topics: Water utilities guidance /
(Posted September 9, 2016)

 

This is what the climate bill Jerry Brown signed means

News article This is what the climate bill Jerry Brown signed means (Published September 9, 2016)
Source: Sacramento Bee
Climate Change Topics: AB 32 / California: Statewide / Greenhouse gas (GHG) reduction, mitigation /
(Posted September 9, 2016)

 

Gov. Brown signs sweeping legislation to combat climate change

News article Gov. Brown signs sweeping legislation to combat climate change (Published September 9, 2016)
Source: Los Angeles Times
Climate Change Topics: AB 32 / California: Statewide / Greenhouse gas (GHG) reduction, mitigation /
(Posted September 9, 2016)

 

CREAT Climate Scenarios Projection Map

Report CREAT Climate Scenarios Projection Map - "The impacts from a changing climate, including extreme heat and more intense storms, present challenges to water, wastewater, and stormwater utilities and the communities they serve. Understanding how climate change may affect a utility's ability to maintain and deliver adequate, reliable, and sustainable water supplies and clean water services is the first step in climate-related planning." Maps present scenarios for future temperature, precipitation, storms, extreme heat, sea level. (Published )
Source: United States. Environmental Protection Agency
Climate Change Topics: Models and Tools / Precipitation, Extreme Weather / Sea level rise / Temperature / Water utilities guidance /
(Posted September 9, 2016)

 

Climate Change Is at the Heart of California's Water Future (Opinion)

News article Climate Change Is at the Heart of California's Water Future (Opinion) (Published September 8, 2016)
Source: Water Deeply
Climate Change Topics: California: Statewide / Groundwater / Water supply, changes in supply, snowpack /
(Posted September 8, 2016)

 

Twelve California Water Experts to Watch on Climate and Energy

News article Twelve California Water Experts to Watch on Climate and Energy (Published September 8, 2016)
Source: Water Deeply
Climate Change Topics: California: Statewide / Energy management and conservation / Water supply, changes in supply, snowpack / Water utilities guidance /
(Posted September 8, 2016)

 

Jerry Brown to sign climate change legislation Thursday

News article Jerry Brown to sign climate change legislation Thursday (Published September 8, 2016)
Source: Los Angeles Times
Climate Change Topics: AB 32 / California: Statewide / Greenhouse gas (GHG) reduction, mitigation /
(Posted September 8, 2016)

 

LeZotte, Norton: San Jose needs Community Choice Energy (Opinion)

News article LeZotte, Norton: San Jose needs Community Choice Energy (Opinion) (Published September 7, 2016)
Source: San Jose Mercury News
Climate Change Topics: California: Bay Area and Delta / Community Choice Aggregation (CCA) /
(Posted September 7, 2016)

 

National Drought Resilience Partnership Report to the Council on Climate Preparedness and Resilience

Report National Drought Resilience Partnership Report to the Council on Climate Preparedness and Resilience - "Federal agencies have mobilized to provide improved information and data, emergency and planning assistance, landscape-scale land management improvements, and investments in new technologies and approaches to water resource management. Continued drought conditions in the West and projections of more extreme droughts in the future underscore the urgency to pursue long term solutions for protecting our water resources and the communities and ecosystems that depend on them." (Published August 31, 2016)
Climate Change Topics: Drought /
(Posted September 7, 2016)

 

Sonoma County preparing for critical climate changes

News article Sonoma County preparing for critical climate changes (Published September 5, 2016)
Source: Santa Rosa Press Democrat
Climate Change Topics: California: Bay Area and Delta / California: Water/Flood Protection Districts / Flooding / Sea level rise / Water supply, changes in supply, snowpack /
(Posted September 6, 2016)

 

Climate change test doesn't make for greener Earth

News article Climate change test doesn't make for greener Earth (Published September 6, 2016)
Source: San Francisco Chronicle
Climate Change Topics: California: Statewide / Ecosystems, Habitat, Threatened Species /
(Posted September 6, 2016)

 

Warmer, wetter climate would impair California grasslands, 17-year experiment finds

News article Warmer, wetter climate would impair California grasslands, 17-year experiment finds
Related Link: http://www.pnas.org/content/early/2016/08/30/1606734113
(Published September 6, 2016)
Source: Phys.Org
Climate Change Topics: California: Statewide / Ecosystems, Habitat, Threatened Species /
(Posted September 6, 2016)

 

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