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Climate Change Blog

 

A probabilistic framework for assessing vulnerability to climate variability and change: the case of the US water supply system

Report A probabilistic framework for assessing vulnerability to climate variability and change: the case of the US water supply system - "We introduce a probabilistic framework for vulnerability analysis and use it to quantify current and future vulnerability of the US water supply system. We also determine the contributions of hydro-climatic and socio-economic drivers to the changes in projected vulnerability. For all scenarios and global climate models examined, the US Southwest including California and the southern Great Plains was consistently found to be the most vulnerable. For most of the US, the largest contributions to changes in vulnerability come from changes in supply. However, for some areas of the West changes in vulnerability are caused mainly by changes in demand. These changes in supply and demand result mainly from changes in evapotranspiration rather than from changes in precipitation. Importantly, changes in vulnerability from projected changes in the standard deviations of precipitation and evapotranspiration are of about the same magnitude or larger than those from changes in the corresponding means over most of the US, except in large areas of the Great Plains, in central California and southern and central Texas." (Foti, R., et al., 2014, Climatic Change) (Published April 17, 2014)
Climate Change Topics: Water supply, changes in supply, snowpack / Water utilities guidance /
(Posted April 22, 2014)

 

Probable causes of the abnormal ridge accompanying the 2013-14 California drought: ENSO precursor and anthropogenic warming footprint

Report Probable causes of the abnormal ridge accompanying the 2013-14 California drought: ENSO precursor and anthropogenic warming footprint - "The 2013-14 California drought was accompanied by an anomalous high-amplitude ridge system. The anomalous ridge was investigated using reanalysis data and the Community Earth System Model (CESM). It was found that the ridge emerged from continual sources of Rossby wave energy in the western North Pacific starting in late summer, and subsequently intensified into winter. The ridge generated a surge of wave energy downwind and deepened further the trough over the northeast U.S., forming a dipole. The dipole and associated circulation pattern is not linked directly with either ENSO or Pacific Decadal Oscillation; instead it is correlated with a type of ENSO precursor. The connection between the dipole and ENSO precursor has become stronger since the 1970s, and this is attributed to increased GHG loading as simulated by the CESM. Therefore, there is a traceable anthropogenic warming footprint in the enormous intensity of the anomalous ridge during winter 2013-14, the associated drought and its intensity." (Wang, S.-Y. Simon, et al. 2014, Geophysical Research Letters) (Published April 14, 2014)
Climate Change Topics: California: Statewide / Drought /
(Posted April 16, 2014)

 

Could Geo-Engineering Cool Our Warming Planet?

News article Could Geo-Engineering Cool Our Warming Planet? (Published April 15, 2014)
Source: KQED Radio
Climate Change Topics: Greenhouse gas (GHG) reduction, mitigation /
(Posted April 15, 2014)

 

NOAA's Weather and Climate Toolkit

Report NOAA's Weather and Climate Toolkit - "The WCT allows the visualization and data export of weather and climate data, including Radar, Satellite and Model data. The WCT also provides access to weather/climate web services provided from NCDC and other organizations. The WCT provides tools for background maps, animations and basic filtering. The export of images and movies is provided in multiple formats" (Published )
Source: United States. National Oceanic and Atmospheric Administration
Climate Change Topics: Models and Tools /
(Posted April 15, 2014)

 

Cost of fighting warming 'modest' (IPCC)

News article Cost of fighting warming 'modest' (IPCC)
Related Link: http://mitigation2014.org/report
(Published April 14, 2014)
Source: San Jose Mercury News
Climate Change Topics: Greenhouse gas (GHG) reduction, mitigation /
(Posted April 14, 2014)

 

IPCC: greenhouse gas emissions have risen to 'unprecedented levels'

News article IPCC: greenhouse gas emissions have risen to 'unprecedented levels' (Published April 13, 2014)
Source: Environmental Research Web
Climate Change Topics: Greenhouse gas (GHG) increases /
(Posted April 14, 2014)

 

Climate Change 2014: Mitigation of Climate Change

Report Climate Change 2014: Mitigation of Climate Change - "Provides a comprehensive assessment of all relevant options for mitigating climate change through limiting or preventing greenhouse gas emissions, as well as activities that remove them from the atmosphere." (Published April 13, 2014)
Source: Intergovernmental Panel on Climate Change (IPCC)
Climate Change Topics: Greenhouse gas (GHG) reduction, mitigation /
(Posted April 14, 2014)

 

Soil Science May Be Important Key to Tackling Climate Change

News article Soil Science May Be Important Key to Tackling Climate Change (Published April 11, 2014)
Source: KQED Radio
Climate Change Topics: Greenhouse gas (GHG) reduction, mitigation /
(Posted April 11, 2014)

 

Why California's Drought Isn't Going Anywhere

News article Why California's Drought Isn't Going Anywhere (Published April 9, 2014)
Source: Climate Central
Climate Change Topics: California: Statewide / Drought /
(Posted April 9, 2014)

 

Population Growth and Climate Change Will Radically Alter California's Largest Watershed (Central Valley)

News article Population Growth and Climate Change Will Radically Alter California's Largest Watershed (Central Valley) (Published April 7, 2014)
Source: Circle of Blue
Climate Change Topics: California: Statewide / Drought / Water supply, changes in supply, snowpack /
(Posted April 8, 2014)

 

Bay Area Air Quality Management District adopts plan to control greenhouse gases

News article Bay Area Air Quality Management District adopts plan to control greenhouse gases (Published April 3, 2014)
Source: Contra Costa Times
Climate Change Topics: California: Bay Area and Delta / Greenhouse gas (GHG) reduction, mitigation /
(Posted April 3, 2014)

 

U.N. Climate Report Authors Answer 11 Basic Questions (IPCC)

News article U.N. Climate Report Authors Answer 11 Basic Questions (IPCC) (Published April 1, 2014)
Source: New York Times
Climate Change Topics: Adaptation / Global issues, human impacts / Greenhouse gas (GHG) reduction, mitigation /
(Posted April 2, 2014)

 

IPCC: Climate Change Is Taking a Toll in California and It's Going to Get Worse

News article IPCC: Climate Change Is Taking a Toll in California and It's Going to Get Worse (Published April 1, 2014)
Source: KQED Radio
Climate Change Topics: Agriculture / California: Statewide / Flooding / Sea level rise / Water supply, changes in supply, snowpack / Wildfires /
(Posted April 2, 2014)

 

Rising Seas

News article Rising Seas (Published March 27, 2014)
Source: New York Times
Climate Change Topics: Sea level rise /
(Posted April 1, 2014)

 

Climate change is felt globally and risks are rising, U.N. panel says

News article Climate change is felt globally and risks are rising, U.N. panel says
Related Link: http://ipcc-wg2.gov/AR5/report/final-drafts/
(Published April 1, 2014)
Source: Los Angeles Times
Climate Change Topics: Adaptation / Agriculture / Global issues, human impacts /
(Posted April 1, 2014)

 

Global warming dials up our risks, UN report says

News article Global warming dials up our risks, UN report says (Published March 30, 2014)
Source: Associated Press
Climate Change Topics: Adaptation / Global issues, human impacts / Greenhouse gas (GHG) reduction, mitigation /
(Posted April 1, 2014)

 

Climate Panel Sees Global Warming Impacts on All Continents, Worse to Come

News article Climate Panel Sees Global Warming Impacts on All Continents, Worse to Come (Published March 31, 2014)
Source: New York Times
Climate Change Topics: Adaptation / Global issues, human impacts /
(Posted April 1, 2014)

 

Climate Change 2014: Impacts, Adaptation, and Vulnerability

Report Climate Change 2014: Impacts, Adaptation, and Vulnerability - Part of IPCC's 5th Assessment. The report considers "the vulnerability and exposure of human and natural systems, the observed impacts and future risks of climate change, and the potential for and limits to adaptation. The chapters of the report assess risks and opportunities for societies, economies, and ecosystems around the world. The 30-chapter report is divided into two volumes. Volume I focuses on global and sectoral aspects. It introduces the report with chapters that provide the context for the AR5, followed by those on natural and managed resources and systems; human settlements, industry, and infrastructure; and human health, well-being, and security. Volume I has a set of four chapters on adaptation. The final three chapters in Volume I synthesize information from Volume I and II chapters to provide multi-sector impacts, risks, vulnerabilities, and opportunities. Volume II chapters provide assessments on regions." (Published March 31, 2014)
Source: Intergovernmental Panel on Climate Change (IPCC)
Climate Change Topics: Adaptation / Global issues, human impacts / Groundwater / Precipitation, Extreme Weather / Streamflow / Water quality / Water supply, changes in supply, snowpack /
(Posted April 1, 2014)

 

Board Adopts Long-Term Plans for Water Facilities and Reducing Greenhouse Gas Emissions: Projected capital improvement program cuts costs by $653 million

News article Board Adopts Long-Term Plans for Water Facilities and Reducing Greenhouse Gas Emissions: Projected capital improvement program cuts costs by $653 million
Related Link: http://www.sdcwa.org/updating-regional-water-facilities-master-plan
(Published March 27, 2014)
Source: San Diego County Water Authority
Climate Change Topics: California: Statewide / California: Water/Flood Protection Districts / Greenhouse gas (GHG) reduction, mitigation / Sample Climate Action Plans /
(Posted March 28, 2014)

 

Regional Water Facilities Optimization and Master Plan Update

Report Regional Water Facilities Optimization and Master Plan Update - "Over the last 20 years, the [San Diego County] Water Authority has made substantial investments in new pipelines, treatment plants, water supply development, and storage reservoirs. These investments have significantly improved the San Diego region’s overall water reliability. Looking forward, the 2013 Master Plan Update is able to focus on optimizing these recent improvements while maintaining the flexibility to adjust to a range of future planning outcomes. The planning approach adopted by the 2013 Master Plan Update considers the 'new normal' of reduced water sales volumes, a greater emphasis on local supply development and conservation, and the need to better manage energy use and seek opportunities to increase renewable energy production." At the same time, SDCWA adopted a Climate Action Plan. (Published March 27, 2014)
Climate Change Topics: California: Statewide / California: Water/Flood Protection Districts / Energy management and conservation / Greenhouse gas (GHG) reduction, mitigation / Sample Climate Action Plans /
(Posted March 28, 2014)

 

Linking storms to climate change a 'distraction', say experts

News article Linking storms to climate change a 'distraction', say experts (Published March 20, 2014)
Source: Science Daily
Climate Change Topics: Adaptation / Precipitation, Extreme Weather /
(Posted March 27, 2014)

 

Study shows invasive species in waterways on rise due to climate change

News article Study shows invasive species in waterways on rise due to climate change (Published March 26, 2014)
Source: Phys.Org
Climate Change Topics: Ecosystems, Habitat, Threatened Species /
(Posted March 27, 2014)

 

Cupertino officials crafting Climate Action Plan

News article Cupertino officials crafting Climate Action Plan (Published March 27, 2014)
Source: Silicon Valley Community Newspapers
Climate Change Topics: California: Bay Area and Delta /
(Posted March 27, 2014)

 

Big climate report: Warming is big risk for people

News article Big climate report: Warming is big risk for people (Published March 24, 2014)
Source: Associated Press
Climate Change Topics: Adaptation / Global issues, human impacts / Politics, laws, United Nations, etc. /
(Posted March 24, 2014)

 

State of the Climate: Global Analysis, 2013

Report State of the Climate: Global Analysis, 2013 - Report on global temperatures and precipitation for the year. (Published December 31, 2013)
Source: United States. National Oceanic and Atmospheric Administration
Climate Change Topics: Precipitation, Extreme Weather / Temperature /
(Posted March 20, 2014)

 

Reducing Climate Risks with Natural Infrastructure

Report Reducing Climate Risks with Natural Infrastructure - Nine case studies from California of floodplain management or restoration projects. (The Nature Conservancy) Keywords: green infrastructure (Published January 9, 2014)
Climate Change Topics: California: Statewide / Ecosystem Services and Climate Change / Flooding / Sea level rise /
(Posted March 20, 2014)

 

White House announces new climate change data website

News article White House announces new climate change data website
Related Link: http://www.data.gov/climate/
(Published March 19, 2014)
Source: Los Angeles Times
Climate Change Topics: Models and Tools /
(Posted March 19, 2014)

 

Scientists warn of global warming's abrupt changes

News article Scientists warn of global warming's abrupt changes
Related Link: http://whatweknow.aaas.org/
(Published March 19, 2014)
Source: Los Angeles Times
Climate Change Topics: Greenhouse gas (GHG) increases / Precipitation, Extreme Weather / Temperature /
(Posted March 19, 2014)

 

Obama unleashing power of data on climate change

News article Obama unleashing power of data on climate change
Related Link: http://www.data.gov/climate/
(Published March 19, 2014)
Source: Associated Press
Climate Change Topics: Models and Tools / Research /
(Posted March 19, 2014)

 

Scientists Sound Alarm on Climate

News article Scientists Sound Alarm on Climate (Published March 19, 2014)
Source: New York Times
Climate Change Topics: Greenhouse gas (GHG) increases / Greenhouse gas (GHG) reduction, mitigation / Precipitation, Extreme Weather / Temperature /
(Posted March 19, 2014)

 

What We Know: The Reality, Risks, and Response to Climate Change

Report What We Know: The Reality, Risks, and Response to Climate Change - "Based on the evidence, more than 97% of climate experts have concluded that human-caused climate change is happening. What We Know helps us understand the science behind the realities, risks and response to the climate challenge." (American Association for the Advancement of Science) (Published March 18, 2014)
Climate Change Topics: Drought / Ecosystems, Habitat, Threatened Species / Flooding / Global issues, human impacts / Greenhouse gas (GHG) increases / Greenhouse gas (GHG) reduction, mitigation / Precipitation, Extreme Weather / Sea and Polar ice / Sea level rise / Temperature / Wildfires /
(Posted March 19, 2014)

 

Climate.data.gov

Report Climate.data.gov - "Here you can find data related to climate change that can help inform and prepare America’s communities, businesses, and citizens. Initially, in this pilot phase, you can find data and resources related to coastal flooding, sea level rise, and their impacts. Over time, you will be able to find additional data and tools relevant to other important climate-related impacts, including risks to human health, the food supply, and energy infrastructure." (Published March 19, 2014)
Source: United States.
Climate Change Topics: Agriculture / Energy management and conservation / Flooding / Global issues, human impacts / Models and Tools / Sea level rise /
(Posted March 19, 2014)

 

Reclamation Releases Central Valley Project Integrated Resource Plan

News article Reclamation Releases Central Valley Project Integrated Resource Plan (Published March 17, 2014)
Source: U.S. Bureau of Reclamation
Climate Change Topics: California: Bay Area and Delta / Water supply, changes in supply, snowpack /
(Posted March 18, 2014)

 

Proposed Assembly bill seeks to create planning database for sea level rise

News article Proposed Assembly bill seeks to create planning database for sea level rise (Published March 18, 2014)
Source: San Francisco Examiner
Climate Change Topics: California: Statewide / Sea level rise /
(Posted March 18, 2014)

 

Central Valley Project Integrated Resource Plan: Summary Document

Report Central Valley Project Integrated Resource Plan: Summary Document - "The Study will assess potential climate change impacts to the Basins' water supplies and demands and will specifically evaluate potential changes to agriculture and urban water supplies, flood control, hydroelectric power generation, recreation, fisheries, wildlife and wildlife habitats, water quality, and water-dependent ecological systems." (Published March 17, 2014)
Source: United States. Bureau of Reclamation
Climate Change Topics: California: Bay Area and Delta / Water supply, changes in supply, snowpack /
(Posted March 18, 2014)

 

Local agencies launch efforts to combat sea level rise: Creek JPA steps up to tackle threat of rising bayside water

News article Local agencies launch efforts to combat sea level rise: Creek JPA steps up to tackle threat of rising bayside water (Published March 9, 2014)
Source: Palo Alto Weekly/Palo Alto Online
Climate Change Topics: California: Bay Area and Delta / Flooding / Sea level rise /
(Posted March 14, 2014)

 

New study predicts fewer rainy days in CA's future

News article New study predicts fewer rainy days in CA's future
Related Link: http://www.nature.com/srep/2014/140313/srep04364/full/srep04364.html
(Published March 13, 2014)
Source: Southern California Public Radio
Climate Change Topics: California: Statewide / Precipitation, Extreme Weather / Water supply, changes in supply, snowpack /
(Posted March 13, 2014)

 

The key role of dry days in changing regional climate and precipitation regimes

Report The key role of dry days in changing regional climate and precipitation regimes - "Future changes in the number of dry days per year can either reinforce or counteract projected increases in daily precipitation intensity as the climate warms. We analyze climate model projected changes in the number of dry days using 28 coupled global climate models from the Coupled Model Intercomparison Project, version 5 (CMIP5). We find that the Mediterranean Sea region, parts of Central and South America, and western Indonesia could experience up to 30 more dry days per year by the end of this century. We illustrate how changes in the number of dry days and the precipitation intensity on precipitating days combine to produce changes in annual precipitation, and show that over much of the subtropics the change in number of dry days dominates the annual changes in precipitation and accounts for a large part of the change in interannual precipitation variability." (Polade, S., et al., 2014, Scientific Reports) (Published March 13, 2014)
Climate Change Topics: Precipitation, Extreme Weather / Water supply, changes in supply, snowpack /
(Posted March 13, 2014)

 

Coastal Blue Carbon Opportunity Assessment for the Snohomish Estuary: The Climate Benefits of Estuary Restoration

Report Coastal Blue Carbon Opportunity Assessment for the Snohomish Estuary: The Climate Benefits of Estuary Restoration - "Blue carbon is a term that recognizes the role of coastal wetlands in the global carbon cycle. Tidal marshes, tidal forested wetlands, and seagrasses sequester carbon dioxide from the atmosphere continuously over thousands of years, building stocks of carbon in organic-rich soils. When coastal wetlands are drained and converted to terrestrial land uses, carbon is rapidly released back to the atmosphere in the form of carbon dioxide. Restoring coastal wetlands stops the drainage-induced releases of carbon and reactivates carbon sequestration." (Restore America's Estuaries) (Published February 4, 2014)
Climate Change Topics: Ecosystem Services and Climate Change / Ecosystems, Habitat, Threatened Species / Greenhouse gas (GHG) reduction, mitigation /
(Posted March 11, 2014)

 

Global Warming? Not Always (Opinion)

News article Global Warming? Not Always (Opinion) (Published March 9, 2014)
Source: New York Times
Climate Change Topics: California: Statewide / Drought /
(Posted March 10, 2014)

 

Clarifying the Discussion about California Drought and Climate Change (Opinion)

News article Clarifying the Discussion about California Drought and Climate Change (Opinion) (Published March 7, 2014)
Source: Pacific Institute
Climate Change Topics: California: Statewide / Drought /
(Posted March 10, 2014)

 

Bay Area Climate Adaptation and Resilience: Nine County-Level Snapshots: Projects, Plans, Structures and Needs

Report Bay Area Climate Adaptation and Resilience: Nine County-Level Snapshots: Projects, Plans, Structures and Needs - Summary of climate adaptation planning in the Bay Area, especially in the areas of flooding (sea level rise, extreme storms), water, energy, land: natural systems and agriculture, health, and multiple impacts and sectors. Santa Clara County snapshot (Bay Area Climate and Energy Resilience Project, March 2014) (Published March 5, 2014)
Source: Association of Bay Area Governments
Climate Change Topics: Adaptation / California: Bay Area and Delta / Energy management and conservation / Flooding / Sea level rise / Water supply, changes in supply, snowpack /
(Posted March 10, 2014)

 

Global Warming and 21st Century Drying

Report Global Warming and 21st Century Drying - "Global warming is expected to increase the frequency and intensity of droughts in the twenty-first century, but the relative contributions from changes in moisture supply (precipitation) versus evaporative demand (potential evapotranspiration; PET) have not been comprehensively assessed. Using output from a suite of general circulation model (GCM) simulations from phase 5 of the Coupled Model Intercomparison Project, projected twenty-first century drying and wetting trends are investigated using two offline indices of surface moisture balance: the Palmer Drought Severity Index (PDSI) and the Standardized Precipitation Evapotranspiration Index (SPEI). PDSI and SPEI projections using precipitation and Penman-Monteith based PET changes from the GCMs generally agree, showing robust cross-model drying in western North America, Central America, the Mediterranean, southern Africa, and the Amazon and robust wetting occurring in the Northern Hemisphere high latitudes and east Africa (PDSI only). The SPEI is more sensitive to PET changes than the PDSI, especially in arid regions such as the Sahara and Middle East. Regional drying and wetting patterns largely mirror the spatially heterogeneous response of precipitation in the models, although drying in the PDSI and SPEI calculations extends beyond the regions of reduced precipitation. This expansion of drying areas is attributed to globally widespread increases in PET, caused by increases in surface net radiation and the vapor pressure deficit. Increased PET not only intensifies drying in areas where precipitation is already reduced, it also drives areas into drought that would otherwise experience little drying or even wetting from precipitation trends alone. This PET amplification effect is largest in the Northern Hemisphere mid-latitudes, and is especially pronounced in western North America, Europe, and southeast China." (Published March 1, 2014)
Climate Change Topics: Drought / Water supply, changes in supply, snowpack /
(Posted March 10, 2014)

 

Projections of Future Drought in the Continental United States and Mexico

Report Projections of Future Drought in the Continental United States and Mexico - "Using the Palmer drought severity index, the ability of 19 state-of-the-art climate models to reproduce observed statistics of drought over North America is examined. It is found that correction of substantial biases in the models’ surface air temperature and precipitation fields is necessary. However, even after a bias correction, there are significant differences in the models’ ability to reproduce observations. Using metrics based on the ability to reproduce observed temporal and spatial patterns of drought, the relationship between model performance in simulating present-day drought characteristics and their differences in projections of future drought changes is investigated. It is found that all models project increases in future drought frequency and severity. However, using the metrics presented here to increase confidence in the multimodel projection is complicated by a correlation between models’ drought metric skill and climate sensitivity. The effect of this sampling error can be removed by changing how the projection is presented, from a projection based on a specific time interval to a projection based on a specified temperature change. This modified class of projections has reduced intermodel uncertainty and could be suitable for a wide range of climate change impacts projections." (Wehner, M., et al., 2011, Journal of Hydrometeorology) (Published December 1, 2011)
Climate Change Topics: Drought /
(Posted March 10, 2014)

 

Stemming the tide: Creek JPA steps up to tackle threat of rising bayside water

News article Stemming the tide: Creek JPA steps up to tackle threat of rising bayside water (Published March 5, 2014)
Source: Menlo Park Almanac
Climate Change Topics: California: Bay Area and Delta / Flooding / Sea level rise /
(Posted March 6, 2014)

 

A Climate Analyst Clarifies the Science Behind California's Water Woes

News article A Climate Analyst Clarifies the Science Behind California's Water Woes (Published March 6, 2014)
Source: New York Times
Climate Change Topics: California: Statewide / Drought / Water supply, changes in supply, snowpack /
(Posted March 6, 2014)

 

Climate engineering ideas no longer considered pie in the sky

News article Climate engineering ideas no longer considered pie in the sky (Published March 5, 2014)
Source: Los Angeles Times
Climate Change Topics: Greenhouse gas (GHG) reduction, mitigation /
(Posted March 5, 2014)

 

National Adaptation Forum Webinar: Safeguarding California

Report National Adaptation Forum Webinar: Safeguarding California - Recorded webinar on the state's climate change adaptation plan (1-hour video) (Published February 20, 2014)
Climate Change Topics: Adaptation / California: Statewide /
(Posted March 5, 2014)

 

Experts at UC Santa Cruz conference urge rethinking responses to climate change

News article Experts at UC Santa Cruz conference urge rethinking responses to climate change (Published March 2, 2014)
Source: Santa Cruz Sentinel
Climate Change Topics: Adaptation /
(Posted March 3, 2014)

 

Little change in global drought over the past 60 years

Report Little change in global drought over the past 60 years - "Drought is expected to increase in frequency and severity in the future as a result of climate change, mainly as a consequence of decreases in regional precipitation but also because of increasing evaporation driven by global warming. Previous assessments of historic changes in drought over the late twentieth and early twenty-first centuries indicate that this may already be happening globally. In particular, calculations of the Palmer Drought Severity Index (PDSI) show a decrease in moisture globally since the 1970s with a commensurate increase in the area in drought that is attributed, in part, to global warming. The simplicity of the PDSI, which is calculated from a simple water-balance model forced by monthly precipitation and temperature data, makes it an attractive tool in large-scale drought assessments, but may give biased results in the context of climate change. Here we show that the previously reported increase in global drought is overestimated because the PDSI uses a simplified model of potential evaporation that responds only to changes in temperature and thus responds incorrectly to global warming in recent decades. More realistic calculations, based on the underlying physical principles that take into account changes in available energy, humidity and wind speed, suggest that there has been little change in drought over the past 60 years. The results have implications for how we interpret the impact of global warming on the hydrological cycle and its extremes, and may help to explain why palaeoclimate drought reconstructions based on tree-ring data diverge from the PDSI-based drought record in recent years." (Sheffield, et al., 2012, Nature) (Published November 14, 2012)
Climate Change Topics: Drought /
(Posted March 3, 2014)

 

Increasing drought under global warming in observations and models

Report Increasing drought under global warming in observations and models - "Historical records of precipitation, streamflow and drought indices all show increased aridity since 1950 over many land areas. Analyses of model-simulated soil moisture, drought indices and precipitation-minus-evaporation suggest increased risk of drought in the twenty-first century. There are, however, large differences in the observed and model-simulated drying patterns. Reconciling these differences is necessary before the model predictions can be trusted. Previous studies show that changes in sea surface temperatures have large influences on land precipitation and the inability of the coupled models to reproduce many observed regional precipitation changes is linked to the lack of the observed, largely natural change patterns in sea surface temperatures in coupled model simulations. Here I show that the models reproduce not only the influence of El Nino-Southern Oscillation on drought over land, but also the observed global mean aridity trend from 1923 to 2010. Regional differences in observed and model-simulated aridity changes result mainly from natural variations in tropical sea surface temperatures that are often not captured by the coupled models. The unforced natural variations vary among model runs owing to different initial conditions and thus are irreproducible. I conclude that the observed global aridity changes up to 2010 are consistent with model predictions, which suggest severe and widespread droughts in the next 30-90 years over many land areas resulting from either decreased precipitation and/or increased evaporation." (Dai, A., 2013, Nature Climate Change) (Published January 22, 2013)
Climate Change Topics: Drought /
(Posted March 3, 2014)

 

Global warming and changes in drought

Report Global warming and changes in drought - "Several recently published studies have produced apparently conflicting results of how drought is changing under climate change. The reason is thought to lie in the formulation of the Palmer Drought Severity Index (PDSI) and the data sets used to determine the evapotranspiration component. Here, we make an assessment of the issues with the PDSI in which several other sources of discrepancy emerge, not least how precipitation has changed and is analysed. As well as an improvement in the precipitation data available, accurate attribution of the causes of drought requires accounting for natural variability, especially El Nino/Southern Oscillation effects, owing to the predilection for wetter land during La Nina events. Increased heating from global warming may not cause droughts but it is expected that when droughts occur they are likely to set in quicker and be more intense." (Trenberth, K. E., et al., 2014, Nature Climate Change) (Published December 20, 2013)
Climate Change Topics: Drought /
(Posted March 3, 2014)

 

The Unusual Nature of Recent Snowpack Declines in the North American Cordillera

Report The Unusual Nature of Recent Snowpack Declines in the North American Cordillera - "In western North America snowpack has declined in recent decades, and further losses are projected through the 21st century. Here we evaluate the uniqueness of recent declines using snowpack reconstructions from 66 tree-ring chronologies in key runoff generating areas of the Colorado, Columbia and Missouri River drainages. Over the past millennium, late-20th century snowpack reductions are almost unprecedented in magnitude across the northern Rocky mountains, and in their north-south synchrony across the cordillera. Both the snowpack declines and their synchrony result from unparalleled springtime warming due to positive reinforcement of the anthropogenic warming by decadal variability. The increasing role of warming on large-scale snowpack variability and trends foreshadows fundamental impacts on streamflow and water supplies across the western USA." (Pederson, G. T., et al., 2011, Science) (Published June 9, 2011)
Climate Change Topics: Water supply, changes in supply, snowpack /
(Posted March 3, 2014)

 

A perspective on cost-effectiveness of greenhouse gas reduction solutions in water distribution systems

Report A perspective on cost-effectiveness of greenhouse gas reduction solutions in water distribution systems - "Water distribution systems (WDSs) face great challenges as aging infrastructures require significant investments in rehabilitation, replacement, and expansion. Reducing environmental impacts as WDSs develop is essential for utility managers and policy makers. This study quantifies the existing greenhouse gas (GHG) footprint of common WDS elements using life-cycle assessment (LCA) while identifying the greatest opportunities for emission reduction. This study addresses oversights of the related literature, which fails to capture several WDS elements and to provide detailed life-cycle inventories. The life-cycle inventory results for a US case study utility reveal that 81% of GHGs are from pumping energy, where a large portion of these emissions are a result of distribution leaks, which account for 270 billion l of water losses daily in the United States. Pipe replacement scheduling is analyzed from an environmental perspective where, through incorporating leak impacts, a tool reveals that optimal replacement is no more than 20 years, which is in contrast to the US average of 200 years." (Published February 26, 2014)
Climate Change Topics: Energy management and conservation / Greenhouse gas (GHG) reduction, mitigation / Water utilities guidance /
(Posted February 28, 2014)

 

Climate and Energy Forecast

News article Climate and Energy Forecast (Published February 24, 2014)
Source: Boom: A Journal of California
Climate Change Topics: California: Statewide / Energy management and conservation / Temperature /
(Posted February 27, 2014)

 

Climate Change: Evidence and Causes

Report Climate Change: Evidence and Causes - 37-page booklet answering questions about what scientists know about climate change and its causes. (Published February 27, 2014)
Source: National Academies
Climate Change Topics: Greenhouse gas (GHG) increases / Greenhouse gas (GHG) reduction, mitigation / Sea level rise / Temperature /
(Posted February 27, 2014)

 

Adapting to Sea Level Rise: A Guide for California's Coastal Communities

Report Adapting to Sea Level Rise: A Guide for California's Coastal Communities - "This guidebook is intended to assist managers and planners in California’s coastal cities and counties in developing sea level rise adaptation plans for their communities. State agency staff who work with these issues may also find it useful. It begins with an introduction that provides background information about climate change and sea level rise and an explanation of why planners in coastal communities should begin to plan for sea level rise and the associated coastal hazards. The remaining sections walk users through the processes of performing sea level rise vulnerability assessments and risk analyses for the development of adaptation plans that can be tailored specifically to their individual communities." Case studies from Santa Cruz and Santa Barbara. (California Ocean Science Trust) (Published January 1, 2012)
Climate Change Topics: Adaptation / California: Statewide / Sea level rise /
(Posted February 26, 2014)

 

Swarm of volcanic eruptions may have slowed global warming

News article Swarm of volcanic eruptions may have slowed global warming (Published February 25, 2014)
Source: Los Angeles Times
Climate Change Topics: Temperature /
(Posted February 25, 2014)

 

Warming Arctic May Be Causing Jet Stream To Lose Its Way

News article Warming Arctic May Be Causing Jet Stream To Lose Its Way (Published February 16, 2014)
Source: National Public Radio (NPR)
Climate Change Topics: Precipitation, Extreme Weather / Sea and Polar ice /
(Posted February 25, 2014)

 

World had 4th warmest January as eastern US froze

News article World had 4th warmest January as eastern US froze (Published February 20, 2014)
Source: Sacramento Bee
Climate Change Topics: Temperature /
(Posted February 20, 2014)

 

Report gauges LA's vulnerability to sea level rise with climate change

News article Report gauges LA's vulnerability to sea level rise with climate change (Published February 19, 2014)
Source: UPI
Climate Change Topics: California: Statewide / Sea level rise /
(Posted February 20, 2014)

 

San Mateo County's coastal communities prepare for sea's steady rise

News article San Mateo County's coastal communities prepare for sea's steady rise (Published February 20, 2014)
Source: San Francisco Chronicle
Climate Change Topics: California: Bay Area and Delta / Sea level rise /
(Posted February 20, 2014)

 

Los Angeles' vulnerability to future sea level rise projected

News article Los Angeles' vulnerability to future sea level rise projected (Published February 18, 2014)
Source: Science Daily
Climate Change Topics: California: Statewide / Sea level rise /
(Posted February 19, 2014)

 

Science Linking Drought to Global Warming Remains Matter of Dispute

News article Science Linking Drought to Global Warming Remains Matter of Dispute (Published February 16, 2014)
Source: New York Times
Climate Change Topics: California: Statewide / Drought /
(Posted February 18, 2014)

 

Obama to ask Congress for $1-billion climate change fund

News article Obama to ask Congress for $1-billion climate change fund (Published February 15, 2014)
Source: Los Angeles Times
Climate Change Topics: Adaptation /
(Posted February 14, 2014)

 

Obama in California: a pledge of drought aid, climate change planning

News article Obama in California: a pledge of drought aid, climate change planning (Published February 14, 2014)
Source: Christian Science Monitor
Climate Change Topics: Adaptation / California: Statewide / Drought /
(Posted February 14, 2014)

 

Planet-warming methane leaking at higher rate, study finds

News article Planet-warming methane leaking at higher rate, study finds (Published February 14, 2014)
Source: Los Angeles Times
Climate Change Topics: Greenhouse gas (GHG) increases /
(Posted February 14, 2014)

 

Obama-appointed climate change task force meets in Los Angeles

News article Obama-appointed climate change task force meets in Los Angeles (Published February 14, 2014)
Source: Los Angeles Times
Climate Change Topics: Adaptation / Greenhouse gas (GHG) reduction, mitigation /
(Posted February 14, 2014)

 

Obama Pledges Over $2 Billion for U.S. Drought Relief, Climate Adaptation

News article Obama Pledges Over $2 Billion for U.S. Drought Relief, Climate Adaptation (Published February 14, 2014)
Source: Circle of Blue
Climate Change Topics: Adaptation / California: Statewide / Drought /
(Posted February 14, 2014)

 

Cities, states tell White House that climate hazards, including drought, are serious and immediate

News article Cities, states tell White House that climate hazards, including drought, are serious and immediate (Published February 13, 2014)
Source: Southern California Public Radio
Climate Change Topics: AB 32 / California: Statewide / Drought / Greenhouse gas (GHG) reduction, mitigation /
(Posted February 14, 2014)

 

Extreme Weather Events: Limiting Federal Fiscal Exposure and Increasing the Nation's Resilience

Report Extreme Weather Events: Limiting Federal Fiscal Exposure and Increasing the Nation's Resilience - "The federal government has opportunities to limit its exposure and increase the nation's resilience to extreme weather events. Since 1980, the U.S. has experienced 151 weather disasters with damages exceeding 1 billion dollars each. This testimony focuses on 4 areas where the government could limit its fiscal exposure: property and crop insurance, disaster aid, owner and operator of infrastructure, provider of technical assistance to state and local governments." (Published February 12, 2014)
Source: United States. Government Accountability Office
Climate Change Topics: Drought / Flooding / Precipitation, Extreme Weather / Sea-Level and Flood Risks: FEMA or Insurance Industry Responses /
(Posted February 14, 2014)

 

Federal Adaptation Planning and Implementation Resources

Report Federal Adaptation Planning and Implementation Resources - "This site includes an array of resources that can help Federal agencies with their climate change adaptation planning and implementation efforts. Resources include relevant executive orders and strategic plans, technical reports on scientific research, guidance and frameworks for adapting to climate change, and summary documents for decision-makers who need only an overview." (Published )
Source: United States. Global Change Research Program
Climate Change Topics: Adaptation / Ecosystems, Habitat, Threatened Species / Precipitation, Extreme Weather / Sea level rise / Water supply, changes in supply, snowpack /
(Posted February 14, 2014)

 

Effects of Climate Change on Inland Fishes of California

Report Effects of Climate Change on Inland Fishes of California - "Today, nearly 50 percent of California’s native freshwater fishes face a high risk of extinction. Add the stress of climate warming, and the projected extinction rate rises to 83 percent within the next 100 years if present trends continue. Much of the unique California fish fauna will vanish and cede their habitats to carp, bass and other alien fishes. More effective conservation efforts would come from a better understanding of the biology and vulnerability of native fishes. Presentation includes: Introduction to California fish fauna, Effects of climate change on native and non-native species, How we can buffer the effects of climate change on native fishes." Peter Moyle, Rebecca Quinones (55-minute webinar) (Published February 7, 2014)
Source: University of California, Davis
Climate Change Topics: California: Statewide / Ecosystems, Habitat, Threatened Species /
(Posted February 13, 2014)

 

San Mateo County lands grant to study sea-level rise impacts around SFO

News article San Mateo County lands grant to study sea-level rise impacts around SFO (Published February 7, 2014)
Source: San Francisco Examiner
Climate Change Topics: California: Bay Area and Delta / Sea level rise /
(Posted February 7, 2014)

 

Sea Level Rise Could Reduce The World Economy By 10 Percent This Century

News article Sea Level Rise Could Reduce The World Economy By 10 Percent This Century (Published February 5, 2014)
Source: Think Progress
Climate Change Topics: Sea level rise /
(Posted February 7, 2014)

 

Product Update: Climate Data Online 3.1

News article Product Update: Climate Data Online 3.1
Related Link: http://www.ncdc.noaa.gov/cdo-web/
(Published February 4, 2014)
Source: U.S. National Oceanic and Atmospheric Administration
Climate Change Topics: Models and Tools / Precipitation, Extreme Weather / Temperature /
(Posted February 5, 2014)

 

USDA chief: Climate change already hurting farmers

News article USDA chief: Climate change already hurting farmers (Published February 5, 2014)
Source: Associated Press
Climate Change Topics: Agriculture /
(Posted February 5, 2014)

 

Obama administration announces 'climate hubs'

News article Obama administration announces 'climate hubs' (Published February 6, 2014)
Source: USA Today
Climate Change Topics: Adaptation / Agriculture /
(Posted February 5, 2014)

 

Climate Data Online

Report Climate Data Online - "Climate Data Online (CDO) provides free access to NCDC's archive of historical weather and climate data in addition to station history information. These data include quality controlled daily, monthly, seasonal, and yearly measurements of temperature, precipitation, wind, and degree days as well as radar data and 30-year Climate Normals. Customers can also order most of these data as certified hard copies for legal use." The search tool, mapping tool, and data tool help you find what you want. (Published )
Source: United States. National Oceanic and Atmospheric Administration
Climate Change Topics: Models and Tools / Precipitation, Extreme Weather / Temperature /
(Posted February 5, 2014)

 

A drier California than ever? Pretty much (Opinion)

News article A drier California than ever? Pretty much (Opinion) (Published February 3, 2014)
Source: Los Angeles Times
Climate Change Topics: California: Statewide / Drought / Water supply, changes in supply, snowpack /
(Posted February 3, 2014)

 

USGS Derived Downscaled Climate Projection Portal

Report USGS Derived Downscaled Climate Projection Portal - "This web portal allows visualization and downloading of future climate projections from a group of 'statistically downscaled' global climate models (GCMs). Temperature and precipitation projections from these models have been used to calculate derivative climate indicators that measure the number of days that exceed certain thresholds." (Published )
Source: United States. Geological Survey
Climate Change Topics: Models and Tools / Precipitation, Extreme Weather / Temperature / Water supply, changes in supply, snowpack /
(Posted February 3, 2014)

 

Beyond the Basics: Best Practices in Local Mitigation Planning

Report Beyond the Basics: Best Practices in Local Mitigation Planning - "This website features numerous examples and best practices that were drawn from high quality hazard mitigation plans identified as part of the University of North Carolina study. High quality plans combine the best available scientific knowledge with informal knowledge of residents and officials familiar with the needs and assets of local communities, and coordinate with community programs aimed at economic, environmental, housing, and infrastructure policies to leverage limited resources in support of mitigation. In addition, other examples and best practices were included in this website based on recommendations from State Hazard Mitigation Officers and a national advisory board." (Published November 7, 2013)
Climate Change Topics: Adaptation / Flooding / Land Use, environmental management systems, and regulation /
(Posted February 3, 2014)

 

EPA Releases Climate Assessment Update To National Stormwater Calculator

News article EPA Releases Climate Assessment Update To National Stormwater Calculator
Related Link: http://www.epa.gov/nrmrl/wswrd/wq/models/swc/
(Published January 30, 2014)
Source: U.S. Environmental Protection Agency
Climate Change Topics: Models and Tools / Precipitation, Extreme Weather / Streamflow /
(Posted January 30, 2014)

 

Water Quality Under Threat Due To Climate Change

News article Water Quality Under Threat Due To Climate Change
Related Link: http://www.waterrf.org/ExecutiveSummaryLibrary/4324_ProjectSummary.pdf
(Published January 29, 2014)
Source: Water Online
Climate Change Topics: Water quality /
(Posted January 30, 2014)

 

Hundred Years of Dry: How California's Drought Could Get Much, Much Worse

News article Hundred Years of Dry: How California's Drought Could Get Much, Much Worse (Published January 23, 2014)
Source: Time magazine
Climate Change Topics: California: Statewide / Drought /
(Posted January 27, 2014)

 

Industry Awakens to Threat of Climate Change

News article Industry Awakens to Threat of Climate Change (Published January 24, 2014)
Source: New York Times
Climate Change Topics: Sea-Level and Flood Risks: FEMA or Insurance Industry Responses / Water-Supply Related Risks: Insurance Industry Responses /
(Posted January 27, 2014)

 

Committee: Time for Bay Area to begin addressing risks posed by sea level rise

News article Committee: Time for Bay Area to begin addressing risks posed by sea level rise (Published January 24, 2014)
Source: San Francisco Examiner
Climate Change Topics: California: Bay Area and Delta / Sea level rise /
(Posted January 24, 2014)

 

Long-term global warming trend sustained in 2013

News article Long-term global warming trend sustained in 2013 (Published January 21, 2014)
Source: U.S. National Aeronautics and Space Administration (NASA)
Climate Change Topics: Greenhouse gas (GHG) increases / Temperature /
(Posted January 22, 2014)

 

NCDC Releases 2013 Global Climate Report

News article NCDC Releases 2013 Global Climate Report (Published January 21, 2014)
Source: U.S. National Oceanic and Atmospheric Administration
Climate Change Topics: Temperature /
(Posted January 22, 2014)

 

California drought and the polar vortex: 'New normal' by 2030?

News article California drought and the polar vortex: 'New normal' by 2030? (Published January 21, 2014)
Source: Southern California Public Radio
Climate Change Topics: California: Statewide / Drought /
(Posted January 22, 2014)

 

Scientists to look for link between California drought, climate change

News article Scientists to look for link between California drought, climate change (Published January 22, 2014)
Source: San Francisco Chronicle
Climate Change Topics: California: Statewide / Drought /
(Posted January 22, 2014)

 

Planning for Sea Level Rise in California's San Francisquito Watershed

Report Planning for Sea Level Rise in California's San Francisquito Watershed - Case study of a project by the San Francisquito Creek Joint Powers Authority (Published January 22, 2014)
Climate Change Topics: California: Bay Area and Delta / Sea level rise /
(Posted January 22, 2014)

 

Feasibility Study on Model Development to Estimate and Minimize Greenhouse Gas Concentrations and Carbon Footprint of Water Reuse and Desalination Facilities

Report Feasibility Study on Model Development to Estimate and Minimize Greenhouse Gas Concentrations and Carbon Footprint of Water Reuse and Desalination Facilities - "This report critically interprets existing literature that will assist utilities employing water reuse and desalination in estimating GHG emissions and carbon footprint while also recommending accessible models to provide estimations. GHG estimation models can aid water reuse and desalination utilities in estimating (1) direct emissions from unit processes, (2) indirect emissions associated with energy consumption, and (3) indirect emissions associated with material consumption (i.e., indirect energy consumption)." (Published November 25, 2013)
Source: WateReuse Association
Climate Change Topics: Energy management and conservation / Greenhouse gas (GHG) reduction, mitigation / Water utilities guidance /
(Posted January 21, 2014)

 

Suburban living linked to bigger carbon footprint

News article Suburban living linked to bigger carbon footprint
Related Link: http://coolclimate.berkeley.edu/maps
(Published January 15, 2014)
Source: San Francisco Chronicle
Climate Change Topics: Greenhouse gas (GHG) increases / Land Use, environmental management systems, and regulation /
(Posted January 15, 2014)

 

Fish Forecast: Swimming Upstream Against Climate Change

News article Fish Forecast: Swimming Upstream Against Climate Change (Published January 14, 2014)
Source: Bay Nature
Climate Change Topics: California: Statewide / Ecosystems, Habitat, Threatened Species /
(Posted January 14, 2014)

 

Water Quality Impacts of Extreme Weather-Related Events

Report Water Quality Impacts of Extreme Weather-Related Events - "The objective of this research was to identify and characterize water quality impacts, ranging through all levels of conveyance and treatment from source to tap, of extreme weather-related events. This project was specifically intended to support the Water Research Foundation’s Climate Change Strategic Initiative objective to provide water utilities with a set of tools to identify and assess their vulnerabilities, and develop effective adaptation strategies. By identifying the characteristics of extreme weather-related events, better characterizing the impacts of these events on water quality, and documenting the 'lessons learned' from such events, we can help utilities obtain a better understanding of the potential impacts of extreme weather events on water quality so that they can prepare and respond to such events quickly and effectively." (Published January 7, 2014)
Source: Water Research Foundation
Climate Change Topics: Adaptation / Precipitation, Extreme Weather / Water quality / Water utilities guidance /
(Posted January 13, 2014)

 

Just How Screwed Is LA's Coast When Sea Levels Rise Two Feet?

News article Just How Screwed Is LA's Coast When Sea Levels Rise Two Feet? (Published January 7, 2014)
Source: Curbed Los Angeles
Climate Change Topics: California: Statewide / Flooding / Sea level rise /
(Posted January 10, 2014)

 

With sea levels rising, the UK is starting to let go of some of its coastline

News article With sea levels rising, the UK is starting to let go of some of its coastline (Published January 9, 2014)
Source: PRI (Public Radio International)
Climate Change Topics: Adaptation / Land Use, environmental management systems, and regulation / Sea level rise /
(Posted January 10, 2014)

 

L.A. storms to grow more destructive as sea level rises, study says

News article L.A. storms to grow more destructive as sea level rises, study says
Related Link: http://www.usc.edu/org/seagrant/research/sea_level_rise_vulnerability.html
(Published January 8, 2014)
Source: Los Angeles Times
Climate Change Topics: California: Statewide / Flooding / Precipitation, Extreme Weather / Sea level rise /
(Posted January 8, 2014)

 

Sea Level Rise Vulnerability Study for the City of Los Angeles

Report Sea Level Rise Vulnerability Study for the City of Los Angeles - "Over the next century, sea level rise in the Los Angeles (L.A.) region is expected to match global projections with an increase of 0.1 - 0.6 m (5 - 24 inches) from 2000 to 2050 and 0.4 - 1.7 m (17 - 66 inches) from 2000 to 2100. Tides, wave-driven runup and storm surge sometimes cause coastal flooding in Southern California, especially when big wave storms occur at or near peak high tides. Sea level rise will potentially exacerbate the impacts from these events. The City of L.A. owns and maintains coastal infrastructure that includes two power plants, two wastewater treatment plants, and the Port of L.A., one of the busiest in the world. All of these are situated about ten feet above sea level. A major component of L.A.'s economy is dependent upon beach tourism. In 2012, the Los Angeles region attracted over 41 million tourists, who accounted for more than $16.5 billion in expenditures." (University of Southern California) (Published January 7, 2014)
Climate Change Topics: Adaptation / California: Statewide / Flooding / Precipitation, Extreme Weather / Sea level rise /
(Posted January 8, 2014)

 

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