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Climate Change Blog

 

Colorado River flows will keep shrinking as climate warms

News article Colorado River flows will keep shrinking as climate warms
Related Link: http://onlinelibrary.wiley.com/doi/10.1002/2016WR019638/abstract
(Published February 21, 2017)
Source: Science Daily
Climate Change Topics: Streamflow / Water supply, changes in supply, snowpack /
(Posted February 22, 2017)

 

The 21st century Colorado River hot drought and implications for the future

Report The 21st century Colorado River hot drought and implications for the future - "Between 2000 and 2014, annual Colorado River flows averaged 19% below the 1906-1999 average, the worst 15-year drought on record. At least one-sixth to one-half (average at one-third) of this loss is due to unprecedented temperatures (0.9 degree C above the 1906-99 average), confirming model-based analysis that continued warming will likely further reduce flows. Whereas it is virtually certain that warming will continue with additional emissions of greenhouse gases to the atmosphere, there has been no observed trend towards greater precipitation in the Colorado Basin, nor are climate models in agreement that there should be a trend. Moreover, there is a significant risk of decadal and multidecadal drought in the coming century, indicating that any increase in mean precipitation will likely be offset during periods of prolonged drought." (Udall, B. and J. Overpeck, 2017, Water Resources Research) (Published February 17, 2017)
Climate Change Topics: Drought / Streamflow / Water supply, changes in supply, snowpack /
(Posted February 22, 2017)

 

Learning from Oroville: Water Board Proposes Climate Change Resolution

News article Learning from Oroville: Water Board Proposes Climate Change Resolution (Published February 20, 2017)
Source: Water Deeply
Climate Change Topics: California: Statewide / Dams and reservoirs / Water supply, changes in supply, snowpack /
(Posted February 21, 2017)

 

To save the Delta, we need to use less water; Aging dams are vulnerable to impact of climate change (1st, 2nd letters)

News article To save the Delta, we need to use less water; Aging dams are vulnerable to impact of climate change (1st, 2nd letters) (Published February 20, 2017)
Source: San Jose Mercury News
Climate Change Topics: Dams and reservoirs /
(Posted February 21, 2017)

 

Oroville Dam crisis could be sign of things to come

News article Oroville Dam crisis could be sign of things to come (Published February 17, 2017)
Source: UCLA
Climate Change Topics: California: Statewide / Dams and reservoirs / Water supply, changes in supply, snowpack /
(Posted February 17, 2017)

 

The dam truth: Climate change means more Lake Orovilles

News article The dam truth: Climate change means more Lake Orovilles (Published February 16, 2017)
Source: Grist
Climate Change Topics: Dams and reservoirs / Precipitation, Extreme Weather / Water supply, changes in supply, snowpack /
(Posted February 17, 2017)

 

How cities can stand up to climate change

News article How cities can stand up to climate change (Published February 15, 2017)
Source: Curbed
Climate Change Topics: Adaptation / Politics, laws, United Nations, etc. / Precipitation, Extreme Weather / Sea level rise /
(Posted February 16, 2017)

 

Scientists have just detected a major change to the Earth's oceans linked to a warming climate

News article Scientists have just detected a major change to the Earth's oceans linked to a warming climate (Published February 16, 2017)
Source: Washington Post
Climate Change Topics: Global issues, human impacts / Greenhouse gas (GHG) increases /
(Posted February 16, 2017)

 

What California's Dam Crisis Says About the Changing Climate

News article What California's Dam Crisis Says About the Changing Climate (Published February 15, 2017)
Source: New York Times
Climate Change Topics: Dams and reservoirs / Drought / Water supply, changes in supply, snowpack / California: Statewide /
(Posted February 16, 2017)

 

Learning from Oroville Dam Disaster: State Water Board Proposes Climate Change Resolution

News article Learning from Oroville Dam Disaster: State Water Board Proposes Climate Change Resolution
Related Link: http://www.waterboards.ca.gov/board_info/agendas/2017/feb/022217_8.pdf
(Published February 15, 2017)
Source: Union of Concerned Scientists
Climate Change Topics: Dams and reservoirs / Precipitation, Extreme Weather / Water supply, changes in supply, snowpack / California: Statewide /
(Posted February 16, 2017)

 

Yesterday's Dams Face Tomorrow's Floods

News article Yesterday's Dams Face Tomorrow's Floods (Published February 15, 2017)
Source: Public Policy Institute of California
Climate Change Topics: Dams and reservoirs / Precipitation, Extreme Weather / Water supply, changes in supply, snowpack / California: Statewide / Flooding /
(Posted February 16, 2017)

 

Communicating Science Effectively

Report Communicating Science Effectively - "Science and technology are embedded in virtually every aspect of modern life. As a result, people face an increasing need to integrate information from science with their personal values and other considerations as they make important life decisions about medical care, the safety of foods, what to do about climate change, and many other issues. Communicating science effectively, however, is a complex task and an acquired skill. Moreover, the approaches to communicating science that will be most effective for specific audiences and circumstances are not obvious. Fortunately, there is an expanding science base from diverse disciplines that can support science communicators in making these determinations. Communicating Science Effectively offers a research agenda for science communicators and researchers seeking to apply this research and fill gaps in knowledge about how to communicate effectively about science, focusing in particular on issues that are contentious in the public sphere. To inform this research agenda, this publication identifies important influences -- psychological, economic, political, social, cultural, and media-related -- on how science related to such issues is understood, perceived, and used." (Published January 10, 2017)
Source: National Academies
Climate Change Topics: Politics, laws, United Nations, etc. /
(Posted February 16, 2017)

 

'Dangerously false': Oroville Dam isn't prepared for global warming, 2008 lawsuit says

News article 'Dangerously false': Oroville Dam isn't prepared for global warming, 2008 lawsuit says (Published February 15, 2017)
Source: Desert Sun
Climate Change Topics: Dams and reservoirs / Precipitation, Extreme Weather / Water supply, changes in supply, snowpack / California: Statewide / Flooding /
(Posted February 15, 2017)

 

Broken California Dam Is a Sign of Emergencies to Come; Climate change is leading to more extreme rainfalls that can overwhelm infrastructure

News article Broken California Dam Is a Sign of Emergencies to Come; Climate change is leading to more extreme rainfalls that can overwhelm infrastructure (Published February 14, 2017)
Source: Scientific American
Climate Change Topics: California: Statewide / Dams and reservoirs / Flooding / Precipitation, Extreme Weather / Water supply, changes in supply, snowpack /
(Posted February 15, 2017)

 

How untreated water is making our kids sick: Researcher explores possible climate change link

News article How untreated water is making our kids sick: Researcher explores possible climate change link (Published February 13, 2017)
Source: Science Daily
Climate Change Topics: Groundwater / Water quality /
(Posted February 15, 2017)

 

Oroville Is a Warning for California Dams, as Climate Change Adds Stress

News article Oroville Is a Warning for California Dams, as Climate Change Adds Stress (Published February 15, 2017)
Source: New York Times
Climate Change Topics: California: Statewide / Dams and reservoirs / Flooding / Precipitation, Extreme Weather / Water supply, changes in supply, snowpack /
(Posted February 14, 2017)

 

As sea levels rise, vital salt marshes are disappearing

News article As sea levels rise, vital salt marshes are disappearing (Published February 12, 2017)
Source: Associated Press
Climate Change Topics: Ecosystems, Habitat, Threatened Species / Sea level rise /
(Posted February 13, 2017)

 

Deep groundwater aquifers respond rapidly to climate variability

News article Deep groundwater aquifers respond rapidly to climate variability
Related Link: http://www.nature.com/ngeo/journal/v10/n2/full/ngeo2883.html
(Published February 8, 2017)
Source: Science Daily
Climate Change Topics: Groundwater /
(Posted February 8, 2017)

 

LA residents slated to receive clean energy soon

News article LA residents slated to receive clean energy soon (Published February 8, 2017)
Source: Los Altos Town Crier
Climate Change Topics: Community Choice Aggregation (CCA) / Renewable energy /
(Posted February 8, 2017)

 

Why Dirt Will Be as Valuable as Water in a Warming World

News article Why Dirt Will Be as Valuable as Water in a Warming World (Published February 7, 2017)
Source: Water Deeply
Climate Change Topics: California: Bay Area and Delta / Dams and reservoirs / Sea level rise /
(Posted February 8, 2017)

 

Scientists hope wetland carbon storage experiment is everyone's cup of tea

News article Scientists hope wetland carbon storage experiment is everyone's cup of tea (Published February 2, 2017)
Source: Guardian (U.K.)
Climate Change Topics: Ecosystem Services and Climate Change / Greenhouse gas (GHG) reduction, mitigation /
(Posted February 6, 2017)

 

Think States Alone Can't Handle Sea Level Rise? Watch California

News article Think States Alone Can't Handle Sea Level Rise? Watch California (Published February 2, 2017)
Source: Wired
Climate Change Topics: Adaptation / California: Statewide / Sea level rise /
(Posted February 3, 2017)

 

California climate bill would add 'social costs' to public works bids

News article California climate bill would add 'social costs' to public works bids (Published February 2, 2017)
Source: San Jose Mercury News
Climate Change Topics: Greenhouse gas (GHG) reduction, mitigation /
(Posted February 2, 2017)

 

New analysis supports mangrove forests, tidal marshes and seagrass meadows as effective climate buffers

News article New analysis supports mangrove forests, tidal marshes and seagrass meadows as effective climate buffers (Published February 1, 2017)
Source: Phys.Org
Climate Change Topics: Ecosystem Services and Climate Change / Greenhouse gas (GHG) reduction, mitigation /
(Posted February 1, 2017)

 

'Planned Retreat' Enters the Climate Dialogue

News article 'Planned Retreat' Enters the Climate Dialogue (Published January 31, 2017)
Source: Scientific American
Climate Change Topics: Adaptation / Flooding / Sea level rise /
(Posted February 1, 2017)

 

Trump official says climate-change skeptic is no longer part of NOAA transition

News article Trump official says climate-change skeptic is no longer part of NOAA transition (Published February 1, 2017)
Source: McClatchy News
Climate Change Topics: Federal Regulations, EPA, Clean Air Act / Politics, laws, United Nations, etc. /
(Posted February 1, 2017)

 

Lab explores projects to lessen effects of sea level rise on SF Bay

News article Lab explores projects to lessen effects of sea level rise on SF Bay (Published January 22, 2017)
Source: San Francisco Chronicle
Climate Change Topics: California: Bay Area and Delta / Flooding / Sea level rise /
(Posted February 1, 2017)

 

Baseline and Projected Future Carbon Storage and Greenhouse-Gas Fluxes in Ecosystems of the Western United States

Report Baseline and Projected Future Carbon Storage and Greenhouse-Gas Fluxes in Ecosystems of the Western United States - "The assessment examined carbon storage, carbon fluxes, and other GHG fluxes (methane and nitrous oxide) in all major terrestrial ecosystems (forests, grasslands/shrublands, agricultural lands, and wetlands) and aquatic ecosystems (rivers, streams, lakes, reservoirs, and coastal waters) in two time periods: baseline (generally in the first half of the 2010s) and future (projections from baseline to 2050). The assessment was based on measured and observed data collected by the U.S. Geological Survey (USGS) and many other agencies and organizations and used remote sensing, statistical methods, and simulation models." (Published February 12, 2013)
Source: United States. Geological Survey
Climate Change Topics: Ecosystem Services and Climate Change / Greenhouse gas (GHG) reduction, mitigation / Land Use, environmental management systems, and regulation /
(Posted February 1, 2017)

 

Land use and land cover change modeling

Report Land use and land cover change modeling - "There are large uncertainties in how land and climate systems will evolve and interact to shape future ecosystem carbon dynamics. To address this uncertainty, we developed the Land-Use and Carbon Scenario Simulator (LUCAS) to track changes in land use, land cover, land management, and disturbance, and their impact on ecosystem carbon storage and flux. The LUCAS model combines a state-and-transition simulation model (STSM) for modeling land-change with a stock and flow model for modeling carbon dynamics, within a scenario-based framework. These two models were developed in conjunction within the ST-SIM modeling environment to provide a complete package for testing a range of future scenarios of land-use change and their impacts on carbon dynamics." (Published December 20, 2016)
Source: United States. Geological Survey
Climate Change Topics: Ecosystem Services and Climate Change / Greenhouse gas (GHG) reduction, mitigation / Land Use, environmental management systems, and regulation /
(Posted February 1, 2017)

 

US set to see significant changes in surface water resources

News article US set to see significant changes in surface water resources
Related Link: http://iopscience.iop.org/article/10.1088/1748-9326/11/11/114003
(Published January 31, 2017)
Source: Environmental Research Web
Climate Change Topics: Water supply, changes in supply, snowpack /
(Posted January 31, 2017)

 

California Climate Console

Report California Climate Console - Projections of temperature, precipitation, aridity, evapotranspiration, vegetation changes, climatic water deficity, and total ecosystem carbon. You can get results by counties, watersheds, and ecoregions. (Published January 1, 2016)
Climate Change Topics: Downscaled Climate Model Data / Ecosystems, Habitat, Threatened Species / Models and Tools / Precipitation, Extreme Weather / Temperature / Water supply, changes in supply, snowpack /
(Posted January 31, 2017)

 

Emergence of new hydrologic regimes of surface water resources in the conterminous United States under future warming

Report Emergence of new hydrologic regimes of surface water resources in the conterminous United States under future warming - "Despite the importance of surface water to people and ecosystems, few studies have explored detectable changes in surface water supply in a changing climate, given its large natural variability. Here we analyze runoff projections from the Variable Infiltration Capacity hydrological model driven by 97 downscaled and bias-corrected Coupled Model Intercomparison Project Phase 5 climate projections over the conterminous United States (CONUS). Our results show that more than 40% of the CONUS land area will experience significant changes in the probability distribution functions (i.e. PDFs) of summer and winter runoff by the end of the 21st century, which may pose great challenges to future surface water supply. Sub-basin mean runoff PDFs are projected to change significantly after 2040s depending on the emission scenarios, with earliest occurrence in the Pacific Northwest and northern California regions.: (Leng, G., et al., 2016, Environmental Research Letters) (Published October 25, 2016)
Climate Change Topics: Water supply, changes in supply, snowpack /
(Posted January 31, 2017)

 

Storms preview ocean-rise damage to California roads, cities

News article Storms preview ocean-rise damage to California roads, cities (Published January 30, 2017)
Source: San Francisco Chronicle
Climate Change Topics: California: Statewide / Sea level rise /
(Posted January 30, 2017)

 

Droughts and Floods: How Climate Change is Affecting California's Water Supply

News article Droughts and Floods: How Climate Change is Affecting California's Water Supply (Published January 27, 2017)
Source: Union of Concerned Scientists
Climate Change Topics: California: Statewide / Drought / Flooding / Water supply, changes in supply, snowpack /
(Posted January 30, 2017)

 

California's Fourth Climate Change Assessment: Research and Tool Development

Report California's Fourth Climate Change Assessment: Research and Tool Development - Research for the forthcoming assessment. The non-energy research portfolio includes: 1. Climate Change, Habitat, and Wildfires: Impacts and Management Options 2. California's Working Lands: Carbon Sequestration for Adaptation and Mitigation 3. Sea Level Rise, California's Coast and Ocean Ecosystems 4. Water Security and Long Droughts 5. Forecasting to Support Climate-Resilient Decision-Making 6. Preparing for Emergency Management in a Changing Climate 7. Funding Adaptation Projects and Measures in California. (Published January 24, 2017)
Source: California. Natural Resources Agency
Climate Change Topics: Adaptation / California: Statewide / Drought / Ecosystems, Habitat, Threatened Species / Greenhouse gas (GHG) reduction, mitigation / Sea level rise / Water supply, changes in supply, snowpack / Wildfires /
(Posted January 30, 2017)

 

Cal-Adapt: Exploring California's Climate Change Research (beta)

Report Cal-Adapt: Exploring California's Climate Change Research (beta) - Downscaled data for California, including projected annual temperature and precipitation averages, extreme heat, sea level rise, snowpack. Also includes a catalog of state climate research. (Published February 16, 2016)
Source: California. Natural Resources Agency
Climate Change Topics: California: Statewide / Downscaled Climate Model Data / Precipitation, Extreme Weather / Sea level rise / Temperature / Water supply, changes in supply, snowpack /
(Posted January 30, 2017)

 

One of the last Obama-era climate reports had a troubling update about the rising seas

News article One of the last Obama-era climate reports had a troubling update about the rising seas
Related Link: https://tidesandcurrents.noaa.gov/publications/techrpt83_Global_and_Regional_SLR_Scenarios_for_the_US_final.pdf
(Published January 24, 2017)
Source: Washington Post
Climate Change Topics: Sea level rise /
(Posted January 26, 2017)

 

California climate change symposium highlights difference between state and federal policy

News article California climate change symposium highlights difference between state and federal policy (Published January 25, 2017)
Source: Sacramento Bee
Climate Change Topics: AB 32 / Federal Regulations, EPA, Clean Air Act /
(Posted January 26, 2017)

 

Antarctic ice melt and California's Shoreline (Opinion)

News article Antarctic ice melt and California's Shoreline (Opinion) (Published January 25, 2017)
Source: San Jose Mercury News
Climate Change Topics: California: Statewide / Sea level rise / Sea and Polar ice /
(Posted January 25, 2017)

 

Trump administration backs off plan to scrub climate pages from EPA website

News article Trump administration backs off plan to scrub climate pages from EPA website (Published January 26, 2017)
Source: Washington Post
Climate Change Topics: Federal Regulations, EPA, Clean Air Act / Politics, laws, United Nations, etc. /
(Posted January 25, 2017)

 

Trump administration tells EPA to cut climate page from website: sources

News article Trump administration tells EPA to cut climate page from website: sources (Published January 25, 2017)
Source: Reuters
Climate Change Topics: Federal Regulations, EPA, Clean Air Act / Politics, laws, United Nations, etc. /
(Posted January 25, 2017)

 

Brown Vows to Continue to Battle Climate Change, Hold Trump to Promise of Strengthening Infrastructure

News article Brown Vows to Continue to Battle Climate Change, Hold Trump to Promise of Strengthening Infrastructure (Published January 24, 2017)
Source: Association of California Water Agencies
Climate Change Topics: California: Statewide / Greenhouse gas (GHG) reduction, mitigation /
(Posted January 25, 2017)

 

Governor's Funding Plan for Climate, Drought

News article Governor's Funding Plan for Climate, Drought (Published January 24, 2017)
Source: Public Policy Institute of California
Climate Change Topics: California: Statewide / Greenhouse gas (GHG) reduction, mitigation /
(Posted January 25, 2017)

 

Global and Regional Sea Level Rise Scenarios for the United States

Report Global and Regional Sea Level Rise Scenarios for the United States - Considers the most recent estimates of sea level rise and variations for the coasts of the U.S. (Published January 18, 2017)
Source: United States. National Oceanic and Atmospheric Administration
Climate Change Topics: Sea level rise /
(Posted January 25, 2017)

 

California Releases Proposed Plan to Achieve 2030 Climate Goals

News article California Releases Proposed Plan to Achieve 2030 Climate Goals (Published January 23, 2017)
Source: Association of California Water Agencies
Climate Change Topics: California: Statewide / Greenhouse gas (GHG) reduction, mitigation /
(Posted January 24, 2017)

 

Trump ditched Obama's climate and water policies on first day

News article Trump ditched Obama's climate and water policies on first day (Published January 24, 2017)
Source: New Scientist
Climate Change Topics: Federal Regulations, EPA, Clean Air Act / Greenhouse gas (GHG) reduction, mitigation /
(Posted January 24, 2017)

 

Regional Climate Change Viewer (RCCV)

Report Regional Climate Change Viewer (RCCV) - "The Regional Climate Change Viewer (RCCV) allows a user to visualize model output from the Dynamical Downscaling project as averages of model grid cell values over bounding polygons that we have selected. Currently, we provide averages over telescoping political outlines (states and counties) and hydrologic units (HUC2, HUC4, HUC8). The RCCV can be used to investigate a subset of the more than 60 variables available in the data sets including air temperature, precipitation, soil moisture, snow water equivalent (SWE), growing degree days and evapotranspiration." (Published May 22, 2013)
Climate Change Topics: Downscaled Climate Model Data / Precipitation, Extreme Weather / Temperature / Water supply, changes in supply, snowpack /
(Posted January 24, 2017)

 

EPA pick Scott Pruitt now says climate change is real

News article EPA pick Scott Pruitt now says climate change is real (Published January 19, 2017)
Source: Associated Press
Climate Change Topics: Federal Regulations, EPA, Clean Air Act / Politics, laws, United Nations, etc. /
(Posted January 19, 2017)

 

EPA pick Scott Pruitt repeats doubts about climate science and attacks on the agency he is expected to head

News article EPA pick Scott Pruitt repeats doubts about climate science and attacks on the agency he is expected to head (Published January 19, 2017)
Source: Los Angeles Times
Climate Change Topics: Federal Regulations, EPA, Clean Air Act / Politics, laws, United Nations, etc. /
(Posted January 19, 2017)

 

Meet the Minds: Roger Bales on Climate Adaptation and Water Security

News article Meet the Minds: Roger Bales on Climate Adaptation and Water Security (Published January 18, 2017)
Source: Water Deeply
Climate Change Topics: Adaptation / California: Statewide / Drought / Water supply, changes in supply, snowpack /
(Posted January 18, 2017)

 

Earth Sets a Temperature Record for the Third Straight Year

News article Earth Sets a Temperature Record for the Third Straight Year (Published January 18, 2017)
Source: New York Times
Climate Change Topics: Temperature /
(Posted January 18, 2017)

 

California's Future

Report California's Future - Summaries of the issues facing the state, including water and climate change. (Updated January 2017) (Published January 6, 2017)
Source: Public Policy Institute of California
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted January 17, 2017)

 

California's Future: Climate Change

Report California's Future: Climate Change - Six-page summary of climate change issues in the state. (Updated Jan. 2017) (Published January 6, 2017)
Source: Public Policy Institute of California
Climate Change Topics: California: Statewide / Greenhouse gas (GHG) reduction, mitigation / Sea level rise / Temperature / Water supply, changes in supply, snowpack /
(Posted January 17, 2017)

 

Projected Impacts of Climate, Urbanization, Water Management, and Wetland Restoration on Waterbird Habitat in California's Central Valley

Report Projected Impacts of Climate, Urbanization, Water Management, and Wetland Restoration on Waterbird Habitat in California's Central Valley - "Future effects of urban development, changes in water supply management, and precipitation and air temperature related to global climate change on area of waterbird habitat in the Central Valley are uncertain, yet potentially substantial. Therefore, we modeled area of waterbird habitats for 17 climate, urbanization, water supply management, and wetland restoration scenarios for years 2006-2099 using a water resources and scenario modeling framework. Planned wetland restoration largely compensated for adverse effects of climate, urbanization, and water supply management changes on habitat areas through 2065, but fell short thereafter for all except one scenario. Projected habitat reductions due to climate models were more frequent and greater than under the recent historical climate and their magnitude increased through time. After 2065, area of waterbird habitat in all scenarios that included severe warmer, drier climate was projected to be >15% less than in the 'existing' landscape most years. The greatest reduction in waterbird habitat occurred in scenarios that combined warmer, drier climate and plausible water supply management options affecting priority and delivery of water available for waterbird habitats. This scenario modeling addresses the complexity and uncertainties in the Central Valley landscape, use and management of related water supplies, and climate to inform waterbird habitat conservation and other resource management planning. Results indicate that increased wetland restoration and additional conservation and climate change adaptation strategies may be warranted to maintain habitat adequate to support waterbirds in the Central Valley." (Matchett, E. L. and J. P. Fleskes, 2017, PLOS) (Published January 9, 2017)
Climate Change Topics: California: Statewide / Ecosystems, Habitat, Threatened Species /
(Posted January 17, 2017)

 

Californians' Views on Climate Change

News article Californians' Views on Climate Change (Published January 10, 2017)
Source: Public Policy Institute of California
Climate Change Topics: California: Statewide / Politics, laws, United Nations, etc. /
(Posted January 11, 2017)

 

New Climate Data Record Focuses on Water

News article New Climate Data Record Focuses on Water (Published January 10, 2017)
Source: U.S. National Oceanic and Atmospheric Administration
Climate Change Topics: Global issues, human impacts / Water supply, changes in supply, snowpack /
(Posted January 10, 2017)

 

State Climate Summaries

Report State Climate Summaries - Data showing observed temperature, precipitation, snowpack, reservoir storage, drought, and sea level. (Published January 9, 2017)
Source: United States. National Oceanic and Atmospheric Administration
Climate Change Topics: Downscaled Climate Model Data / Drought / Precipitation, Extreme Weather / Sea level rise / Temperature / Water supply, changes in supply, snowpack /
(Posted January 10, 2017)

 

California Climate and Hydrology Change Graphs

Report California Climate and Hydrology Change Graphs - "This graphing tool presents climate and hydrology data values from the California Basin Characterization Model dataset plotted over time for 156 hydrologic basins (HUC-8 basins) that comprise hydrologic California." (California Landscape Conservation Cooperative Climate Commons) (Published January 1, 2016)
Climate Change Topics: California: Statewide / Downscaled Climate Model Data / Precipitation, Extreme Weather / Temperature / Water supply, changes in supply, snowpack /
(Posted January 10, 2017)

 

New California Dam Proposed to Combat Climate Change Concerns

News article New California Dam Proposed to Combat Climate Change Concerns (Published January 9, 2017)
Source: Water Deeply
Climate Change Topics: California: Statewide / Dams and reservoirs / Water supply, changes in supply, snowpack /
(Posted January 9, 2017)

 

New State Climate Summaries Bring Local Information to You

News article New State Climate Summaries Bring Local Information to You (Published January 9, 2017)
Source: U.S. National Oceanic and Atmospheric Administration
Climate Change Topics: Downscaled Climate Model Data / Precipitation, Extreme Weather / Sea level rise / Temperature /
(Posted January 9, 2017)

 

Global warming data that riled doubters is confirmed

News article Global warming data that riled doubters is confirmed (Published January 5, 2017)
Source: Associated Press
Climate Change Topics: Research / Temperature /
(Posted January 5, 2017)

 

MIT scientists: Monster storms will triple in California by 2100

News article MIT scientists: Monster storms will triple in California by 2100
Related Link: http://journals.ametsoc.org/doi/10.1175/JCLI-D-16-0544.1
(Published January 5, 2017)
Source: San Francisco Chronicle
Climate Change Topics: California: Statewide / Precipitation, Extreme Weather /
(Posted January 5, 2017)

 

Scientists say the global ocean circulation may be more vulnerable to shutdown than we thought

News article Scientists say the global ocean circulation may be more vulnerable to shutdown than we thought (Published January 5, 2017)
Source: Washington Post
Climate Change Topics: Global issues, human impacts /
(Posted January 4, 2017)

 

California Snow Levels Below Normal Despite Heavy Rains

News article California Snow Levels Below Normal Despite Heavy Rains (Published January 3, 2017)
Source: Union of Concerned Scientists
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted January 4, 2017)

 

More extreme storms ahead for California; New technique predicts frequency of heavy precipitation with global warming

News article More extreme storms ahead for California; New technique predicts frequency of heavy precipitation with global warming
Related Link: http://journals.ametsoc.org/doi/10.1175/JCLI-D-16-0544.1
(Published January 3, 2017)
Source: Science Daily
Climate Change Topics: California: Statewide / Precipitation, Extreme Weather /
(Posted January 4, 2017)

 

21st Century Changes in U.S. Regional Heavy Precipitation Frequency Based on Resolved Atmospheric Patterns

Report 21st Century Changes in U.S. Regional Heavy Precipitation Frequency Based on Resolved Atmospheric Patterns - "Scientists have found that extreme precipitation events in California should become more frequent as the Earth's climate warms over this century. The researchers developed a new technique that predicts the frequency of local, extreme rainfall events by identifying telltale large-scale patterns in atmospheric data." -- Science News. (Gao, X., et al., 2016, Journal of Climate) (Published December 21, 2016)
Climate Change Topics: California: Statewide / Precipitation, Extreme Weather /
(Posted January 4, 2017)

 

Increase in hourly precipitation extremes beyond expectations from temperature changes

Report Increase in hourly precipitation extremes beyond expectations from temperature changes - "Changes in precipitation extremes under greenhouse warming are commonly assumed to be constrained by changes in the amounts of precipitable water in the atmosphere. Global climate models generally predict only marginal changes in relative humidity, implying that the actual amount of atmospheric precipitable water scales with the water vapour content of saturation, which is governed by the Clausius-Clapeyron relation. Indeed, changes in daily precipitation extremes in global climate models seem to be consistent with the 7% increase per degree of warming given by the Clausius-Clapeyron relation, but it is uncertain how general this scaling behaviour is across timescales. Here, we analyse a 99-year record of hourly precipitation observations from De Bilt, the Netherlands, and find that one-hour precipitation extremes increase twice as fast with rising temperatures as expected from the Clausius-Clapeyron relation when daily mean temperatures exceed 12 degrees C. In addition, simulations with a high-resolution regional climate model show that one-hour precipitation extremes increase at a rate close to 14% per degree of warming in large parts of Europe. Our results demonstrate that changes in short-duration precipitation extremes may well exceed expectations from the Clausius-Clapeyron relation. These short-duration extreme events can have significant impacts, such as local flooding, erosion and water damage." (Lenderink, G. and E. Van Meijgaard, 2008, Nature Geoscience) (Published July 20, 2008)
Climate Change Topics: Precipitation, Extreme Weather /
(Posted January 4, 2017)

 

Gauging climate preparedness to inform adaptation needs: local level adaptation in drinking water quality in CA, USA

Report Gauging climate preparedness to inform adaptation needs: local level adaptation in drinking water quality in CA, USA - "Understanding resource managersÂ’ perceptions of climate change, analytic capacity, and current adaptation activities can provide insight into what can help support adaptation processes at the local level. In California, where a major drought currently demonstrates some of the hardships that could be regularly encountered under a changing climate, we present results from a survey of drinking water utilities about the perceived threat, analytic capacity, and adaptation actions related to maintaining water quality in the face of climate change. Among surveyed utilities (n=259), awareness is high in regard to climate change occurring and its potential impacts on water quality globally, but perceived risk is lower with regard to climate impacts on local drinking water quality. Just over half of surveyed utilities report at least some adaptation activity to date. The top three variables that most strongly correlated with reported adaptation action were (1) perceived risk on global and local water quality, (2) surface water reliance, and (3) provision of other services beyond drinking water. Other tested variables significantly correlated with reported adaptation action were (4) degree of impact from the current drought and (5) communication with climate change experts. Findings highlight that smaller groundwater-reliant utilities may need the most assistance to initiate climate adaptation processes. Trusted information sources most frequently used across respondents were state government agencies, followed by colleagues in the same utilities. The finding that frequently used sources of information are similar across utilities presents a promising opportunity for training and disseminating climate information to assist those systems needing the most support." (Ekstrom, J. A., et al., 2016, Climatic Change) (Published December 23, 2016)
Climate Change Topics: Adaptation / California: Statewide / California: Water/Flood Protection Districts / Drought / Water quality / Water utilities guidance /
(Posted December 28, 2016)

 

Sunnyvale municipal electricity to go 100 percent green energy

News article Sunnyvale municipal electricity to go 100 percent green energy (Published December 25, 2016)
Source: San Jose Mercury News
Climate Change Topics: California: Bay Area and Delta / Community Choice Aggregation (CCA) / Renewable energy /
(Posted December 27, 2016)

 

How Climate Change Will Affect the Future of California Water

News article How Climate Change Will Affect the Future of California Water
Related Link: https://www.youtube.com/watch?v=U9pHCxNxJP0
(Published December 21, 2016)
Source: Water Deeply
Climate Change Topics: Adaptation / California: Statewide / Drought / Greenhouse gas (GHG) reduction, mitigation / Groundwater / Water supply, changes in supply, snowpack /
(Posted December 21, 2016)

 

On bias correction in drought frequency analysis based on climate models

Report On bias correction in drought frequency analysis based on climate models - "Assessment of future drought characteristics based on climate models is difficult as climate models usually have bias in simulating precipitation frequency and intensity. In this study, we examine the significance of bias correction in the context of drought frequency and scenario analysis using output from climate models. In particular, we use three bias correction techniques with different emphases and complexities to investigate how they affect the results of drought frequency and severity based on climate models. The characteristics of drought are investigated using regional climate model (RCM) output from the North American Regional Climate Change Assessment Program (NARCCAP). The Standardized Precipitation Index (SPI) is used to compare and forecast drought characteristics at different timescales. Systematic biases in the RCM precipitation output are corrected against the National Centers for Environmental Prediction (NCEP) North American Regional Reanalysis (NARR) data and the bias-corrected RCM historical simulations. Preserving mean and standard deviation of NARR precipitation is essential in drought frequency analysis. The results demonstrate that bias correction significantly decreases the RCM errors in reproducing drought frequency derived from the NARR data. Different timescales of input precipitation in the bias corrections show similar results. The relative changes in drought frequency in future scenario compared to historical scenario are similar whether both scenarios are bias corrected or both are not bias corrected." (Aryal, Y. and J. Zhu, 2016, Climatic Change) (Published December 10, 2016)
Climate Change Topics: Drought / Models and Tools /
(Posted December 19, 2016)

 

Sources and implications of deep uncertainties surrounding sea-level projections

Report Sources and implications of deep uncertainties surrounding sea-level projections - "Long-term flood risk management often relies on future sea-level projections. Projected uncertainty ranges are however widely divergent as a result of different methodological choices. The IPCC has condensed this deep uncertainty into a single uncertainty range covering 66% probability or more. Alternatively, structured expert judgment summarizes divergent expert opinions in a single distribution. Recently published uncertainty ranges that are derived from these 'consensus' assessments appear to differ by up to a factor four. This might result in overconfidence or overinvestment in strategies to cope with sea-level change. Here we explore possible reasons for these different interpretations. This is important for (i) the design of robust strategies and (ii) the exploration of pathways that may eventually lead to some kind of consensus distributions that are relatively straightforward to interpret." (Bakker, A. M. R., et al., 2016, Climatic Change) (Published December 9, 2016)
Climate Change Topics: Flooding / Sea level rise /
(Posted December 19, 2016)

 

Explaining Extreme Events of 2015 from a Climate Perspective

Report Explaining Extreme Events of 2015 from a Climate Perspective - "This fifth edition of explaining extreme events of the previous year (2015) from a climate perspective continues to provide evidence that climate change is altering some extreme event risk. . . . Many papers in this year's report demonstrate that attribution science is capable of separating the effects of natural drivers including the strong 2015 El Nino from the influences of long-term human-induced climate change." (Published December 15, 2016)
Climate Change Topics: Precipitation, Extreme Weather / Temperature /
(Posted December 19, 2016)

 

King tides expected to have more impact as sea levels rise

News article King tides expected to have more impact as sea levels rise (Published December 15, 2016)
Source: San Francisco Chronicle
Climate Change Topics: California: Bay Area and Delta / Flooding / Sea level rise /
(Posted December 15, 2016)

 

UCD receives $6M to tame 'wild west' of climate datasets

News article UCD receives $6M to tame 'wild west' of climate datasets (Published December 13, 2016)
Source: Davis Enterprise
Climate Change Topics: Models and Tools /
(Posted December 15, 2016)

 

Extreme downpours could increase fivefold across parts of the U.S.

News article Extreme downpours could increase fivefold across parts of the U.S.
Related Link: http://www.nature.com/nclimate/journal/vaop/ncurrent/full/nclimate3168.html
(Published December 14, 2016)
Source: Environmental Research Web
Climate Change Topics: Precipitation, Extreme Weather /
(Posted December 15, 2016)

 

Scientists are frantically copying U.S. climate data, fearing it might vanish under Trump

News article Scientists are frantically copying U.S. climate data, fearing it might vanish under Trump (Published December 14, 2016)
Source: Washington Post
Climate Change Topics: Federal Regulations, EPA, Clean Air Act /
(Posted December 14, 2016)

 

Looking Forward: Priorities for Managing Freshwater Resources in a Changing Climate: National Action Plan Update

Report Looking Forward: Priorities for Managing Freshwater Resources in a Changing Climate: National Action Plan Update - Recommends federal actions to support water resilience in the areas of data and research, planning and decision support, and training and outreach. Includes an inventory of major hydro-dlimatic data collection systems in the United States. (Published December 5, 2016)
Climate Change Topics: Adaptation / Models and Tools /
(Posted December 14, 2016)

 

The future intensification of hourly precipitation extremes

Report The future intensification of hourly precipitation extremes - "Extreme precipitation intensities have increased in all regions of the Contiguous United States (CONUS) and are expected to further increase with warming at scaling rates of about 7% per degree Celsius, suggesting a significant increase of flash flood hazards due to climate change. However, the scaling rates between extreme precipitation and temperature are strongly dependent on the region, temperature, and moisture availability, which inhibits simple extrapolation of the scaling rate from past climate data into the future. Here we study observed and simulated changes in local precipitation extremes over the CONUS by analysing a very high resolution (4?km horizontal grid spacing) current and high-end climate scenario that realistically simulates hourly precipitation extremes. We show that extreme precipitation is increasing with temperature in moist, energy-limited, environments and decreases abruptly in dry, moisture-limited, environments. This novel framework explains the large variability in the observed and modelled scaling rates and helps with understanding the significant frequency and intensity increases in future hourly extreme precipitation events and their interaction with larger scales." (Prein, A. F., et al., 2016, Nature Climate Change) (Published December 5, 2016)
Climate Change Topics: Precipitation, Extreme Weather /
(Posted December 14, 2016)

 

The world's wet regions are getting wetter, the dry regions are getting drier

News article The world's wet regions are getting wetter, the dry regions are getting drier (Published December 12, 2016)
Source: Science Daily
Climate Change Topics: Drought / Water supply, changes in supply, snowpack /
(Posted December 12, 2016)

 

Rising Seas, Federal Inaction and Donald Trump Turn Climate Change into a Local Issue

News article Rising Seas, Federal Inaction and Donald Trump Turn Climate Change into a Local Issue (Published December 8, 2016)
Source: Metro/San Jose Inside
Climate Change Topics: California: Bay Area and Delta / Flooding / Santa Clara Valley Water District / Sea level rise /
(Posted December 8, 2016)

 

Trump Expected to Tap Champion of Fossil Fuels as Environmental Chief

News article Trump Expected to Tap Champion of Fossil Fuels as Environmental Chief (Published December 8, 2016)
Source: Associated Press
Climate Change Topics: Federal Regulations, EPA, Clean Air Act /
(Posted December 8, 2016)

 

Trump names climate change skeptic and oil industry ally to lead the EPA

News article Trump names climate change skeptic and oil industry ally to lead the EPA (Published December 8, 2016)
Source: Los Angeles Times
Climate Change Topics: Federal Regulations, EPA, Clean Air Act /
(Posted December 7, 2016)

 

Trump Picks Scott Pruitt, Climate Change Denialist, to Lead E.P.A.

News article Trump Picks Scott Pruitt, Climate Change Denialist, to Lead E.P.A. (Published December 8, 2016)
Source: New York Times
Climate Change Topics: Federal Regulations, EPA, Clean Air Act /
(Posted December 7, 2016)

 

Climate Change Will Bring Wetter Storms in U.S., Study Says

News article Climate Change Will Bring Wetter Storms in U.S., Study Says (Published December 6, 2016)
Source: New York Times
Climate Change Topics: Precipitation, Extreme Weather / Water supply, changes in supply, snowpack /
(Posted December 6, 2016)

 

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 / Downscaled Climate Model Data /
(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)

 

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