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Climate Change Blog

 

In California, a Wet Era May Be Ending

News article In California, a Wet Era May Be Ending (Published April 14, 2015)
Source: New York Times
Climate Change Topics: California: Statewide / Drought / Water supply, changes in supply, snowpack /
(Posted April 14, 2015)

 

Building the Knowledge Base for Climate Resiliency: New York City Panel on Climate Change 2015 Report

Report Building the Knowledge Base for Climate Resiliency: New York City Panel on Climate Change 2015 Report - "Each year, the NPCC reviews recent scientific data on climate change and its potential impacts, and makes recommendations on climate projections for the coming decades to the end of the century. This volume is a continuation of the NPCC assessment process that began in 2008, with some significant advances that reflect the growing sophistication of climate science research and the evolving policy agenda to which it must respond. The report provides the City of New York with projections of its climate to the end of the century, both static and dynamic coastal storm surge modeling, and next steps in the development of an indicators and monitoring system for climate change impacts and adaptation. The assessment process is innovative because it looks beyond critical infrastructure and its vulnerability to climate change, and more directly focuses on what a more dynamic climate will mean for the everyday experience of the city's residents." (Published February 1, 2015)
Climate Change Topics: Flooding / Precipitation, Extreme Weather / Sea level rise / Temperature /
(Posted April 14, 2015)

 

California's drought and the weird warm 'blob' in the Pacific that may be fueling it

News article California's drought and the weird warm 'blob' in the Pacific that may be fueling it (Published April 10, 2015)
Source: Washington Post
Climate Change Topics: California: Statewide / Drought / Temperature /
(Posted April 10, 2015)

 

Scientists: State drought likely to worsen; Stanford scientists say dry years and warm conditions likely to lead to severe drought

News article Scientists: State drought likely to worsen; Stanford scientists say dry years and warm conditions likely to lead to severe drought (Published April 8, 2015)
Source: Palo Alto Weekly/Palo Alto Online
Climate Change Topics: California: Statewide / Drought /
(Posted April 9, 2015)

 

In Parched California, Innovation, Like Water, Has Limits

News article In Parched California, Innovation, Like Water, Has Limits (Published April 8, 2015)
Source: New York Times
Climate Change Topics: Adaptation / Agriculture / California: Statewide / Drought / Water supply, changes in supply, snowpack /
(Posted April 8, 2015)

 

Near-term acceleration in the rate of temperature change

Report Near-term acceleration in the rate of temperature change - "Anthropogenically driven climate changes, which are expected to impact human and natural systems, are often expressed in terms of global-mean temperature. The rate of climate change over multi-decadal scales is also important, with faster rates of change resulting in less time for human and natural systems to adapt. We find that present trends in greenhouse-gas and aerosol emissions are now moving the Earth system into a regime in terms of multi-decadal rates of change that are unprecedented for at least the past 1,000 years. The rate of global-mean temperature increase in the CMIP5 archive over 40-year periods increases to 0.25 plus or minus 0.05 degrees C (1 standard deviation) per decade by 2020, an average greater than peak rates of change during the previous one to two millennia. Regional rates of change in Europe, North America and the Arctic are higher than the global average. Research on the impacts of such near-term rates of change is urgently needed." (Smith, S. J., et al., 2015, Nature Climate Change) (Published March 9, 2015)
Climate Change Topics: Temperature /
(Posted April 8, 2015)

 

2014 Highlights of Progress: Responses to Climate Change by the National Water Program

Report 2014 Highlights of Progress: Responses to Climate Change by the National Water Program - EPA's work in water infrastructure, watersheds and wetlands, coastal waters, and water quality. (Published March 25, 2015)
Source: United States. Environmental Protection Agency
Climate Change Topics: Adaptation / Drought / Ecosystems, Habitat, Threatened Species / Water quality / Water utilities guidance /
(Posted April 8, 2015)

 

Sonoma County Water Agency hits clean energy goal

News article Sonoma County Water Agency hits clean energy goal (Published April 7, 2015)
Source: Santa Rosa Press Democrat
Climate Change Topics: California: Bay Area and Delta / California: Water/Flood Protection Districts / Energy management and conservation / Greenhouse gas (GHG) reduction, mitigation / Renewable energy /
(Posted April 7, 2015)

 

Clean Energy Opportunities in California's Water Sector

Report Clean Energy Opportunities in California's Water Sector - "By investing in clean, renewable energy sources, water utilities can better adapt to changing conditions while creating new revenue streams, protecting their customers from electricity price volatility, and enhancing the state's efforts to reduce global warming pollution." (Union of Concerned Scientists) (Published April 6, 2015)
Climate Change Topics: California: Statewide / Energy management and conservation / Water utilities guidance / Renewable energy / California: Water/Flood Protection Districts /
(Posted April 7, 2015)

 

Climate change to make California drought worse, report says

News article Climate change to make California drought worse, report says
Related Link: http://riskybusiness.org/california-report/pdf
(Published April 3, 2015)
Source: San Francisco Chronicle
Climate Change Topics: California: Statewide / Drought /
(Posted April 6, 2015)

 

From Boom to Bust? Climate Change in the Golden State

Report From Boom to Bust? Climate Change in the Golden State - "This report focuses on California and explores some of the likely economic consequences to the state of continuing on our current greenhouse gas emissions pathway, with no significant new national policy or global action to mitigate climate change. . . . These risks include: A dramatic increase in extreme heat across the state, especially in the San Joaquin Valley and Inland South regions . . . Changes in the timing, amount, and type of precipitation in California, which could lead to increased drought and flooding and put the reliability of the state's water supply at risk . . . Widespread losses of coastal property and infrastructure due to sea-level rise along the California coast . . . Shifting agricultural patterns and crop yields, with distinct threats to California's varied crop mix of fruits, vegetables, nuts, and other highly valuable commodities . . . Increasing electricity demand combined with reduced system capacity, leading to higher energy costs . . . Higher heat-related mortality, declining labor productivity, and worsened air quality." (Risky Business) (Published April 2, 2015)
Climate Change Topics: Agriculture / California: Statewide / Energy management and conservation / Flooding / Global issues, human impacts / Precipitation, Extreme Weather / Sea level rise / Temperature / Water supply, changes in supply, snowpack / Sea-Level and Flood Risks: FEMA or Insurance Industry Responses / Water-Supply Related Risks: Insurance Industry Responses /
(Posted April 6, 2015)

 

California Drought Is Worsened by Global Warming, Scientists Say

News article California Drought Is Worsened by Global Warming, Scientists Say (Published April 2, 2015)
Source: New York Times
Climate Change Topics: California: Statewide / Drought /
(Posted April 2, 2015)

 

Model helps city planners prepare to weather large storms

News article Model helps city planners prepare to weather large storms (Published March 31, 2015)
Source: Science Daily
Climate Change Topics: Precipitation, Extreme Weather /
(Posted April 1, 2015)

 

Adaptation Strategies for Water Utilities

Report Adaptation Strategies for Water Utilities - Helps utilities prepare for challenges such as drought, water quality degradation, floods, ecosystem changes, and changes in service demand and use. (Part of EPA's Climate Ready Water Utilities program) Updated in 2015 to include updated climate models, updated case studies, green infrastructure, energy management, and water demand management. (Published March 4, 2015)
Source: United States. Environmental Protection Agency
Climate Change Topics: Adaptation / Drought / Energy management and conservation / Flooding / Precipitation, Extreme Weather / Sea level rise / Water quality / Water supply, changes in supply, snowpack / Water utilities guidance /
(Posted April 1, 2015)

 

California Climate Data Archive (CalClim)

Report California Climate Data Archive (CalClim) - Temperature and precipitation data. Calclim is sponsored by the California Energy Commission and is a joint effort between the Scripps Institute of Oceanography and the Western Regional Climate Center. (Published )
Climate Change Topics: California: Statewide / Models and Tools / Precipitation, Extreme Weather / Temperature /
(Posted April 1, 2015)

 

California's Water

Report California's Water - Updated report on water issues. (April 2015) (Published April 1, 2015)
Source: Public Policy Institute of California
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted April 1, 2015)

 

Home on the California Range, Year 2100: Land Use and Climate Change Could Impact Wildlife, Water Supplies

News article Home on the California Range, Year 2100: Land Use and Climate Change Could Impact Wildlife, Water Supplies (Published March 25, 2015)
Source: U.S. Geological Survey
Climate Change Topics: California: Statewide / Ecosystem Services and Climate Change / Ecosystems, Habitat, Threatened Species / Land Use, environmental management systems, and regulation /
(Posted March 26, 2015)

 

In a warmer world, researchers say climate change is intensifying California's water crisis

News article In a warmer world, researchers say climate change is intensifying California's water crisis (Published March 24, 2015)
Source: KALW
Climate Change Topics: California: Statewide / Drought / Water supply, changes in supply, snowpack /
(Posted March 25, 2015)

 

Climate change and California drought in the 21st century

Report Climate change and California drought in the 21st century - "Recent analyses have thus established the 'fingerprint' of anthropogenic climate change in an increasingly diverse array of meteorological and hydrological phenomena around the world, from heat waves to coastal damages during extreme tides and storms, flooding from more intense precipitation events, and severe drought. In a new study published in PNAS, Diffenbaugh et al. now add weight to the accumulating evidence that anthropogenic climatic changes are already influencing the frequency, magnitude, and duration of drought in California. The authors show that the increasing co-occurrence of dry years with warm years raises the risk of drought despite limited evidence of a trend in precipitation itself, highlighting the critical role of elevated temperatures in altering water availability and increasing overall drought intensity and impact." (Mann, M. E. and P. H. Gleick, 2015, Proceedings of the National Academy of Sciences) (Published March 23, 2015)
Climate Change Topics: California: Statewide / Drought /
(Posted March 24, 2015)

 

San Jose's general plan imperiled by greenhouse gas lawsuit

News article San Jose's general plan imperiled by greenhouse gas lawsuit (Published March 23, 2015)
Source: Silicon Valley Business Journal
Climate Change Topics: California: Bay Area and Delta / Land Use, environmental management systems, and regulation /
(Posted March 23, 2015)

 

San Lorenzo: Environmentally friendly levee could protect against sea level rise

News article San Lorenzo: Environmentally friendly levee could protect against sea level rise (Published March 18, 2015)
Source: Contra Costa Times
Climate Change Topics: California: Bay Area and Delta / Flooding / Sea level rise /
(Posted March 20, 2015)

 

New Report Reveals Drought Increases Energy Costs and Climate-Changing Pollution

News article New Report Reveals Drought Increases Energy Costs and Climate-Changing Pollution (Published March 17, 2015)
Source: Pacific Institute
Climate Change Topics: California: Statewide / Drought / Energy management and conservation / Greenhouse gas (GHG) increases /
(Posted March 18, 2015)

 

Impacts of California's Ongoing Drought: Hydroelectricity Generation

Report Impacts of California's Ongoing Drought: Hydroelectricity Generation - "Our analysis find[s] that during the three years ending in October 2014 (the end of the 2014 'water year'), the cost to California ratepayers of reduced hydroelectricity production and the use of additional natural gas was approximately $1.4 billion dollars. The additional combustion of fossil fuels for electric generation caused an eight percent increase in the release of carbon dioxide from California power plants." (Published March 17, 2015)
Source: Pacific Institute
Climate Change Topics: California: Statewide / Drought / Energy management and conservation / Greenhouse gas (GHG) increases /
(Posted March 18, 2015)

 

Heat is on to slow down faster rise in temperatures

News article Heat is on to slow down faster rise in temperatures (Published March 16, 2015)
Source: Environmental Research Web
Climate Change Topics: Temperature /
(Posted March 17, 2015)

 

Lake Tahoe: Drought, climate change threatening winter, way of life at iconic landmark

News article Lake Tahoe: Drought, climate change threatening winter, way of life at iconic landmark (Published March 14, 2015)
Source: San Jose Mercury News
Climate Change Topics: California: Statewide / Drought / Temperature /
(Posted March 16, 2015)

 

Climate change weakens summer circulation in northern hemisphere

News article Climate change weakens summer circulation in northern hemisphere (Published March 13, 2015)
Source: Environmental Research Web
Climate Change Topics: Precipitation, Extreme Weather /
(Posted March 16, 2015)

 

Get ready for weirder weather in California (Column)

News article Get ready for weirder weather in California (Column) (Published March 12, 2015)
Source: Sacramento Bee
Climate Change Topics: California: Statewide / Precipitation, Extreme Weather /
(Posted March 12, 2015)

 

San Mateo County embarking on new sea rise vulnerability study

News article San Mateo County embarking on new sea rise vulnerability study (Published March 7, 2015)
Source: San Francisco Chronicle
Climate Change Topics: California: Bay Area and Delta / Sea level rise /
(Posted March 9, 2015)

 

Flooding Google: Google's New Headquarters and the Threat of Sea-Level Rise

News article Flooding Google: Google's New Headquarters and the Threat of Sea-Level Rise (Published March 4, 2015)
Source: Huffington Post
Climate Change Topics: California: Bay Area and Delta / Flooding / Sea level rise /
(Posted March 6, 2015)

 

Scientists explain how climate change helps fuel California drought

News article Scientists explain how climate change helps fuel California drought (Published March 3, 2015)
Source: Los Angeles Times
Climate Change Topics: California: Statewide / Drought /
(Posted March 3, 2015)

 

Report: Droughts Likely To Continue In California, Maybe Forever

News article Report: Droughts Likely To Continue In California, Maybe Forever (Published March 2, 2015)
Source: SFist
Climate Change Topics: California: Statewide / Drought /
(Posted March 3, 2015)

 

Adaptation Policy and Plan

Report Adaptation Policy and Plan - Most recent climate change adaptation policies and plans from the Army Corps of Engineers (Published October 31, 2014)
Source: United States. Army Corps of Engineers
Climate Change Topics: Adaptation /
(Posted March 3, 2015)

 

Incorporating Sea Level Change in Civil Works Programs

Report Incorporating Sea Level Change in Civil Works Programs - "Guidance for incorporating the direct and indirect physical effects of projected future sea level change across the project life cycle in managing, planning, engineering, designing, constructing, operating, and maintaining USACE projects and systems of projects." (Regulation ER 1100-2-8162) Supersedes Circular EC 1165-2-212 (Published December 31, 2013)
Source: United States. Army Corps of Engineers
Climate Change Topics: Planning Guides / Sea level rise /
(Posted March 3, 2015)

 

Procedures to Evaluate Sea Level Change: Impacts, Responses, and Adaptation

Report Procedures to Evaluate Sea Level Change: Impacts, Responses, and Adaptation - "Provides guidance for understanding the direct and indirect physical and ecological effects of projected future sea level change on USACE projects and systems of projects and considerations for adapting to those effects." (Technical Letter ETL 1100-2-1) (Published June 30, 2014)
Source: United States. Army Corps of Engineers
Climate Change Topics: Adaptation / Planning Guides / Sea level rise /
(Posted March 3, 2015)

 

Comprehensive Evaluation of Projects with Respect to Sea-Level Change

Report Comprehensive Evaluation of Projects with Respect to Sea-Level Change - Includes a sea-level change curve calculator, which the Corps uses to make low, medium, and high projections for sea level rise. Also links to the latest Corps policies and guidelines. (Published February 26, 2015)
Source: United States. Army Corps of Engineers
Climate Change Topics: Models and Tools / Sea level rise /
(Posted March 3, 2015)

 

Record winter warmth not helping with drought

News article Record winter warmth not helping with drought (Published March 3, 2015)
Source: San Francisco Chronicle
Climate Change Topics: California: Statewide / Drought /
(Posted March 2, 2015)

 

California drought likely a fixture, says Stanford study

News article California drought likely a fixture, says Stanford study
Related Link: http://www.pnas.org/content/early/2015/02/23/1422385112
(Published March 3, 2015)
Source: San Jose Mercury News
Climate Change Topics: California: Statewide / Drought /
(Posted March 2, 2015)

 

California Drought Linked to Human-Caused Warming: Study

News article California Drought Linked to Human-Caused Warming: Study (Published March 2, 2015)
Source: NBC News
Climate Change Topics: California: Statewide / Drought /
(Posted March 2, 2015)

 

The Greenhouse Effect Is Truly at Work, Observations Show

News article The Greenhouse Effect Is Truly at Work, Observations Show (Published February 27, 2015)
Source: KQED Radio
Climate Change Topics: Temperature / Greenhouse gas (GHG) increases /
(Posted March 2, 2015)

 

Anthropogenic warming has increased drought risk in California

Report Anthropogenic warming has increased drought risk in California - "Our analyses show that California has historically been more likely to experience drought if precipitation deficits co-occur with warm conditions and that such confluences have increased in recent decades, leading to increases in the fraction of low-precipitation years that yield drought. In addition, we find that human emissions have increased the probability that low-precipitation years are also warm, suggesting that anthropogenic warming is increasing the probability of the co-occurring warm-dry conditions that have created the current California drought." (Diffenbaugh, N. S., et al., 2015, Proceedings of the National Academy of Sciences) (Published March 2, 2015)
Climate Change Topics: California: Statewide / Drought /
(Posted March 2, 2015)

 

A cause for pause? Scientists offer reasons for global warming 'hiatus'

News article A cause for pause? Scientists offer reasons for global warming 'hiatus' (Published February 27, 2015)
Source: Los Angeles Times
Climate Change Topics: Temperature /
(Posted February 27, 2015)

 

Joint effects of storm surge and sea-level rise on US Coasts: new economic estimates of impacts, adaptation, and benefits of mitigation policy

Report Joint effects of storm surge and sea-level rise on US Coasts: new economic estimates of impacts, adaptation, and benefits of mitigation policy - "Recent literature, the US Global Change Research Program’s National Climate Assessment, and recent events, such as Hurricane Sandy, highlight the need to take better account of both storm surge and sea-level rise (SLR) in assessing coastal risks of climate change. This study combines three models -- a tropical cyclone simulation model; a storm surge model; and a model for economic impact and adaptation -- to estimate the joint effects of storm surge and SLR for the US coast through 2100. The model is tested using multiple SLR scenarios, including those incorporating estimates of dynamic ice-sheet melting, two global greenhouse gas (GHG) mitigation policy scenarios, and multiple general circulation model climate sensitivities. The results illustrate that a large area of coastal land and property is at risk of damage from storm surge today; that land area and economic value at risk expands over time as seas rise and as storms become more intense; that adaptation is a cost-effective response to this risk, but residual impacts remain after adaptation measures are in place; that incorporating site-specific episodic storm surge increases national damage estimates by a factor of two relative to SLR-only estimates, with greater impact on the East and Gulf coasts; and that mitigation of GHGs contributes to significant lessening of damages." (Neumann, J. E., et al., 2015, Climatic Change) (Published March 1, 2015)
Climate Change Topics: Flooding / Sea level rise /
(Posted February 27, 2015)

 

First direct observation of carbon dioxide's increasing greenhouse effect at Earth's surface

News article First direct observation of carbon dioxide's increasing greenhouse effect at Earth's surface (Published February 25, 2015)
Source: Science Daily
Climate Change Topics: Greenhouse gas (GHG) increases / Temperature /
(Posted February 26, 2015)

 

DWR Honored with National Climate Leadership Award

News article DWR Honored with National Climate Leadership Award (Published February 24, 2015)
Source: California Dept. of Water Resources
Climate Change Topics: California: Statewide / Energy management and conservation /
(Posted February 25, 2015)

 

2014 California BCM (Basin Characterization Model) Downscaled Climate and Hydrology - Monthly Data

Report 2014 California BCM (Basin Characterization Model) Downscaled Climate and Hydrology - Monthly Data - "The California Basin Characterization Model (CA-BCM 2014) dataset provides historical and projected climate and hydrologic surfaces for the region that encompasses the state of California and all the streams that flow into it (California hydrologic region ). The CA-BCM 2014 applies a monthly regional water-balance model to simulate hydrologic responses to climate at the spatial resolution of a 270-m grid. The model has been calibrated using a total of 159 relatively unimpaired watersheds for the California region. The historical data is based on 800m PRISM data spatially downscaled to 270 m using the gradient-inverse distance squared approach (GIDS), and the projected climate surfaces include five CMIP-3 and nine CMIP-5 General Circulation Models under a range of emission scenarios or representative concentration pathways (RCPs) for a total of 18 futures that have been statistically downscaled using BCSD to 800 m and further downscaled using GIDS to 270 m for model application." (Published July 1, 2014)
Source: United States. Geological Survey
Climate Change Topics: California: Statewide / Streamflow / Water supply, changes in supply, snowpack /
(Posted February 25, 2015)

 

Twentieth-century shifts in forest structure in California: Denser forests, smaller trees, and increased dominance of oaks

Report Twentieth-century shifts in forest structure in California: Denser forests, smaller trees, and increased dominance of oaks - "Declines in the number of large trees in temperate and tropical forests have attracted attention, given their disproportionate importance to forest structure, function, and carbon storage. Yet, factors responsible for these declines are unclear. By comparing historic (1930s) and contemporary (2000s) surveys of California forests, we document that across 120,000 km2, large trees have declined by up to 50%, corresponding to a 19% decline in average basal area and associated biomass, despite large increases in small tree density. Contemporary forests also exhibit increased dominance by oaks over pines. Both large tree declines and increased oak dominance were associated with increases in climatic water deficit, suggesting that water stress may be contributing to changes in forest structure and function across large areas." (McIntyre, P. J., et al., 2014, Proceedings of the National Academy of Sciences) (Published December 15, 2014)
Climate Change Topics: California: Statewide / Ecosystems, Habitat, Threatened Species /
(Posted February 25, 2015)

 

Guidance for Incorporating Sea Level Rise into Capital Planning in San Francisco: Assessing Vulnerability, Risk, and Adaptation (Draft)

Report Guidance for Incorporating Sea Level Rise into Capital Planning in San Francisco: Assessing Vulnerability, Risk, and Adaptation (Draft) - "As a consequence of rising sea level, San Francisco will experience more frequent and severe coastal flooding than in the past. Areas that currently experience infrequent flooding will be inundated more often and more areas along our shorelines will be exposed to periodic flooding than in the past or today. Sea level rise therefore poses a pervasive and increasing threat along San Francisco’s shorelines. As new infrastructure projects are planned along the shoreline, or existing assets are modified or improved, flooding due to rising sea levels -- in combination with storm surge and wave run up -- must be evaluated." (Sea Level Rise Committee, SF Adapt) (Published July 11, 2014)
Climate Change Topics: California: Bay Area and Delta / Sea level rise /
(Posted February 25, 2015)

 

Is drought the new normal for Southern California? (Column)

News article Is drought the new normal for Southern California? (Column) (Published February 24, 2015)
Source: Los Angeles Times
Climate Change Topics: California: Statewide / Drought /
(Posted February 24, 2015)

 

Robust Hadley Circulation changes and increasing global dryness due to CO2 warming from CMIP5 model projections

Report Robust Hadley Circulation changes and increasing global dryness due to CO2 warming from CMIP5 model projections - "In spite of increasing research efforts, global warming signals of the Hadley Circulation (HC) and its dynamical linkages to water cycle changes remain largely unknown. Here, from model projections, we find robust signals of both strengthening and weakening components of the HC induced by CO2 warming. These changes in the HC drive a pattern of global dryness featuring widespread reduction of tropospheric humidity and increased frequency of dry months, particularly over subtropical and tropical land regions. We also find that global warming signal in increased dryness is the most detectable among numerous water-cycle quantities examined. Our results provide a scientific basis for inferring that greenhouse warming is likely to contribute to the observed prolonged worldwide droughts in recent decades." (Lau, W. K. M. and K.-M. Kim, 2015, Proceedings of the National Academy of Sciences) (Published January 22, 2015)
Climate Change Topics: Drought /
(Posted February 24, 2015)

 

How to interpret expert judgment assessments of 21st century sea-level rise

Report How to interpret expert judgment assessments of 21st century sea-level rise - "In a recent paper Bamber and Aspinall (Nat Clim Change 3:424-427, 2013) (BA13) investigated the sea-level rise that may result from the Greenland and Antarctic ice sheets during the 21st century. Using data from an expert judgment elicitation, they obtained a final high-end (P95) value of +84 cm integrated sea-level change from the ice sheets for the 2010-2100 period. However, one key message was left largely undiscussed: The experts had strongly diverging opinions about the ice-sheet contributions to sea-level rise. We argue that such (lack of) consensus should form an essential and integral part of the subsequent analysis of the data. ... Our analysis therefore demonstrates that one should be careful in considering high-end sea-level rise estimates as being well-determined and fixed numbers." (De Vries, H. and R. S. W. Van de Wal, 2015, Climatic Change) (Published February 20, 2015)
Climate Change Topics: Sea level rise /
(Posted February 24, 2015)

 

Storm Water Management Model (SWMM)

Report Storm Water Management Model (SWMM) - "EPA's Storm Water Management Model (SWMM) is used throughout the world for planning, analysis and design related to stormwater runoff, combined and sanitary sewers, and other drainage systems in urban areas. There are many applications for drainage systems in non-urban areas as well." Optional add-in: a Climate Adjustment Tool (SWMM-CAT) (Published October 9, 2014)
Source: United States. Environmental Protection Agency
Climate Change Topics: Models and Tools / Water quality / Precipitation, Extreme Weather /
(Posted February 23, 2015)

 

Adapting California's Ecosystems to a Changing Climate

Report Adapting California's Ecosystems to a Changing Climate - "Significant efforts are underway to translate improved understanding of how climate change is altering ecosystems into practical actions for sustaining ecosystem functions and benefits. We explore this transition in California, where adaptation and mitigation are advancing relatively rapidly, through four case studies that span large spatial domains and encompass diverse ecological systems, institutions, ownerships, and policies. The case studies demonstrate the context specificity of societal efforts to adapt ecosystems to climate change and involve applications of diverse scientific tools (e.g., scenario analyses, downscaled climate projections, ecological and connectivity models) tailored to specific planning and management situations (alternative energy siting, wetland management, rangeland management, open space planning). They illustrate how existing institutional and policy frameworks provide numerous opportunities to advance adaptation related to ecosystems and suggest that progress is likely to be greatest when scientific knowledge is integrated into collective planning and when supportive policies and financing enable action. " (Chornesky, E. A., et al., 2015, BioScience) (Published February 11, 2015)
Climate Change Topics: Adaptation / California: Statewide / Ecosystems, Habitat, Threatened Species /
(Posted February 23, 2015)

 

Climate Change Poses Existential Water Risks

News article Climate Change Poses Existential Water Risks (Published February 17, 2015)
Source: National Geographic
Climate Change Topics: Drought / Water supply, changes in supply, snowpack /
(Posted February 18, 2015)

 

Integrated climate and land use change scenarios for California rangeland ecosystem services: wildlife habitat, soil carbon, and water supply

Report Integrated climate and land use change scenarios for California rangeland ecosystem services: wildlife habitat, soil carbon, and water supply - "Results support the need for climate-smart land use planning that takes recharge areas into account, which will provide opportunities for water storage in dry years. Given projections for agriculture, more modeling is needed on feedbacks between agricultural expansion on rangelands and water supply." (Byrd, K. B., et al., 2015, Landscape Ecology) (Published February 5, 2015)
Climate Change Topics: California: Statewide / Ecosystem Services and Climate Change / Land Use, environmental management systems, and regulation / Water supply, changes in supply, snowpack /
(Posted February 18, 2015)

 

Scientists look at role of wetlands in battle against climate change

News article Scientists look at role of wetlands in battle against climate change (Published February 16, 2015)
Source: Phys.Org
Climate Change Topics: Ecosystem Services and Climate Change / Greenhouse gas (GHG) reduction, mitigation /
(Posted February 17, 2015)

 

San Jose: Scientists call for "geoengineering" tests to find ways to cool the planet

News article San Jose: Scientists call for "geoengineering" tests to find ways to cool the planet (Published February 15, 2015)
Source: San Jose Mercury News
Climate Change Topics: Greenhouse gas (GHG) reduction, mitigation /
(Posted February 17, 2015)

 

At a glance: Water reports target critical issues

News article At a glance: Water reports target critical issues (Published February 16, 2015)
Source: Capitol Weekly
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted February 17, 2015)

 

Climate Action Plan Toolkit: EPA Releases Stormwater Climate Change Tool

News article Climate Action Plan Toolkit: EPA Releases Stormwater Climate Change Tool (Published February 13, 2015)
Source: U.S. Environmental Protection Agency
Climate Change Topics: Precipitation, Extreme Weather / Water quality /
(Posted February 13, 2015)

 

New Study: Global Warming Will Bring Megadroughts to the West

News article New Study: Global Warming Will Bring Megadroughts to the West (Published February 13, 2015)
Source: KQED Radio
Climate Change Topics: Drought /
(Posted February 13, 2015)

 

Warming pushes Western U.S. toward driest period in 1,000 years: Unprecedented risk of drought in 21st century

News article Warming pushes Western U.S. toward driest period in 1,000 years: Unprecedented risk of drought in 21st century (Published February 12, 2015)
Source: Science Daily
Climate Change Topics: Drought /
(Posted February 13, 2015)

 

Scientists predict 'megadroughts' will hit the West, last for decades

News article Scientists predict 'megadroughts' will hit the West, last for decades
Related Link: http://advances.sciencemag.org/content/1/1/e1400082
(Published February 13, 2015)
Source: San Jose Mercury News
Climate Change Topics: Drought /
(Posted February 13, 2015)

 

Revised Draft Guidance for Greenhouse Gas Emissions and Climate Change Impacts

Report Revised Draft Guidance for Greenhouse Gas Emissions and Climate Change Impacts - "This guidance explains that agencies should consider both the potential effects of a proposed action on climate change, as indicated by its estimated greenhouse gas emissions, and the implications of climate change for the environmental effects of a proposed action. The guidance also emphasizes that agency analyses should be commensurate with projected greenhouse gas emissions and climate impacts, and should employ appropriate quantitative or qualitative analytical methods to ensure useful information is available to inform the public and the decision-making process in distinguishing between alternatives and mitigations. ... Unlike the 2010 draft guidance, the revised draft guidance applies to all proposed Federal agency actions, including land and resource management actions. … CEQ is soliciting public comment on this revised draft guidance for 60 days, with the comment period closing on February 23, 2015." (Published December 18, 2014)
Source: United States. White House Council on Environmental Quality
Climate Change Topics: Federal Regulations, EPA, Clean Air Act /
(Posted February 13, 2015)

 

Unprecedented 21st century drought risk in the American Southwest and Central Plains

Report Unprecedented 21st century drought risk in the American Southwest and Central Plains - "In the Southwest and Central Plains of Western North America, climate change is expected to increase drought severity in the coming decades. These regions nevertheless experienced extended Medieval-era droughts that were more persistent than any historical event, providing crucial targets in the paleoclimate record for benchmarking the severity of future drought risks. We use an empirical drought reconstruction and three soil moisture metrics from 17 state-of-the-art general circulation models to show that these models project significantly drier conditions in the later half of the 21st century compared to the 20th century and earlier paleoclimatic intervals. This desiccation is consistent across most of the models and moisture balance variables, indicating a coherent and robust drying response to warming despite the diversity of models and metrics analyzed. Notably, future drought risk will likely exceed even the driest centuries of the Medieval Climate Anomaly (1100-1300 CE) in both moderate (RCP 4.5) and high (RCP 8.5) future emissions scenarios, leading to unprecedented drought conditions during the last millennium." (Cook, B. I., et al., 2015, Science Advances) (Published February 1, 2015)
Climate Change Topics: Drought /
(Posted February 13, 2015)

 

The magnitude and spatial patterns of historical and future hydrologic change in California's watersheds

Report The magnitude and spatial patterns of historical and future hydrologic change in California's watersheds - "Process-based models that link climate and hydrology permit improved assessments of climate change impacts among watersheds. We used the Basin Characterization Model (BCM), a regional water balance model to (1) ask what is the magnitude of historical and projected future change in the hydrology of California's watersheds; (2) test the spatial congruence of watersheds with the most historical and future hydrologic change; and (3) identify watersheds with high levels of hydrologic change under drier and wetter future climates. We assessed change for 5135 watersheds over a 60-year historical period and compared it to 90-year future projections. Watershed change was analyzed for climatic water deficit, April 1st snowpack, recharge, and runoff. Watersheds were ranked by change for the historical and two future scenarios. We developed a normalized index of hydrologic change that combined the four variables, and identified which watersheds show the most spatial congruence of large historical change and continued change under the two futures." (Thorne, J. H., et al., 2015, Ecosphere) (Published February 12, 2015)
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted February 13, 2015)

 

California's Future: Climate Change

Report California's Future: Climate Change - Six-page summary of climate change issues in the state. (Published February 5, 2015)
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 February 12, 2015)

 

The best fix for farmers' water problems (Column)

News article The best fix for farmers' water problems (Column) (Published February 11, 2015)
Source: Santa Clarita Valley Signal
Climate Change Topics: Agriculture / California: Statewide / Greenhouse gas (GHG) reduction, mitigation /
(Posted February 11, 2015)

 

Climate change: California lawmakers to introduce sweeping new measures to increase renewable energy, cut fossil fuel use

News article Climate change: California lawmakers to introduce sweeping new measures to increase renewable energy, cut fossil fuel use (Published February 11, 2015)
Source: San Jose Mercury News
Climate Change Topics: California: Statewide / Energy management and conservation / Greenhouse gas (GHG) reduction, mitigation /
(Posted February 11, 2015)

 

Climate Intervention: Carbon Dioxide Removal and Reliable Sequestration

Report Climate Intervention: Carbon Dioxide Removal and Reliable Sequestration - "Land management practices, such as low-till agriculture, reforestation and afforestation, ocean iron fertilization, and land-and-ocean-based accelerated weathering, could amplify the rates of processes that are already occurring as part of the natural carbon cycle. Other CDR [carbon dioxide removal] approaches, such as bioenergy with carbon capture and sequestration, direct air capture and sequestration, and traditional carbon capture and sequestration, seek to capture CO2 from the atmosphere and dispose of it by pumping it underground at high pressure. This book looks at the pros and cons of these options and estimates possible rates of removal and total amounts that might be removed via these methods." (Published February 10, 2015)
Source: National Academies
Climate Change Topics: Greenhouse gas (GHG) reduction, mitigation /
(Posted February 11, 2015)

 

Climate Intervention: Reflecting Sunlight to Cool Earth

Report Climate Intervention: Reflecting Sunlight to Cool Earth - "Discusses albedo modification - changing the fraction of incoming solar radiation that reaches the surface. This approach would deliberately modify the energy budget of Earth to produce a cooling designed to compensate for some of the effects of warming associated with greenhouse gas increases. The prospect of large-scale albedo modification raises political and governance issues at national and global levels, as well as ethical concerns." (Published February 10, 2015)
Source: National Academies
Climate Change Topics: Greenhouse gas (GHG) reduction, mitigation /
(Posted February 11, 2015)

 

Strong storms set to grow stronger

News article Strong storms set to grow stronger (Published February 10, 2015)
Source: Environmental Research Web
Climate Change Topics: Precipitation, Extreme Weather /
(Posted February 10, 2015)

 

As Extreme Weather Increases, A Push for Advanced Forecasts

News article As Extreme Weather Increases, A Push for Advanced Forecasts (Published February 9, 2015)
Source: Yale Environment 360
Climate Change Topics: Precipitation, Extreme Weather /
(Posted February 10, 2015)

 

Warm rains dictate new reservoirs (Column)

News article Warm rains dictate new reservoirs (Column) (Published February 10, 2015)
Source: Sacramento Bee
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted February 10, 2015)

 

Top U.S. scientists urge pursuit of technology to cool planet

News article Top U.S. scientists urge pursuit of technology to cool planet (Published February 10, 2015)
Source: Los Angeles Times
Climate Change Topics: Greenhouse gas (GHG) reduction, mitigation /
(Posted February 10, 2015)

 

Adapting to Climate Change in California

Report Adapting to Climate Change in California - "Many aspects of the Californian approach to controlling the greenhouse gases that cause climate change now have a sufficient track record to provide potential models or lessons for national and even international action. In comparison, the state's efforts on climate change adaptation, although multifaceted, are less well developed and thus far have focused largely on information sharing, impact assessments, and planning. Still, adaptation could advance more quickly in California than in many other regions, given relatively high public awareness and concern, extensive scientific information, a strong tradition of local and regional planning, and some enabling policies and institutions. Much more political support and sufficient financing will have to be mustered at state and local levels to enable new projects and initiatives to cope with sea level rise, water management, and ecosystem adaptation, not to mention public health and other key areas of concern. Even so, California's initial efforts to adapt to unavoidable changes in climate may offer insights for other governments that will, inevitably, need to fashion their own adaptation strategies." (Davis, F. W. and E. A. Chornesky, 2014, Bulletin of the Atomic Scientists) (Published August 12, 2014)
Climate Change Topics: Adaptation / California: Water/Flood Protection Districts / Ecosystems, Habitat, Threatened Species / Sea level rise / Water supply, changes in supply, snowpack /
(Posted February 10, 2015)

 

California Basin Characterization Model: A Dataset of Historical and Future Hydrologic Response to Climate Change

Report California Basin Characterization Model: A Dataset of Historical and Future Hydrologic Response to Climate Change - "To plan for future water- and land-resource demands, resource managers have generally relied on data from global climate model projections of precipitation and air temperature trends that lack the detail needed for precision planning at regional and local scales. Recently, the U.S. Geological Survey (USGS) has developed modeling tools that integrate climate data with rigorously developed regional and local environmental data to understand the hydrologic response to climate change and the effects on regional and local watersheds and landscapes. New water-balance modeling tools can provide the types of information managers require to develop climate-change coping strategies: (1) Watershed recharge and runoff quantification -- to assess water availability, seasonality, and extremes at the land surface; (2) Climatic water deficit estimation -- to assess irrigation demand or landscape stress (climatic water deficit is the amount of water plants would use if it were available); (3)Spatial distribution of hydrologic processes in watersheds -- for resource planning and infrastructure development." Fact sheet. (Published February 9, 2015)
Source: United States. Geological Survey
Climate Change Topics: California: Statewide / Models and Tools / Water supply, changes in supply, snowpack /
(Posted February 10, 2015)

 

Ancient climate records 'back predictions'

News article Ancient climate records 'back predictions' (Published February 4, 2015)
Source: BBC
Climate Change Topics: Research / Temperature /
(Posted February 9, 2015)

 

Global Warming May Alter Critical Atmospheric Rivers: How will climate change impact the source of much of California's water?

News article Global Warming May Alter Critical Atmospheric Rivers: How will climate change impact the source of much of California's water? (Published February 6, 2015)
Source: Scientific American
Climate Change Topics: California: Water/Flood Protection Districts / Precipitation, Extreme Weather / Water supply, changes in supply, snowpack /
(Posted February 9, 2015)

 

Study Reveals Climate Change Impacts on Irrigation Demand and Reservoir Evaporation in the West

News article Study Reveals Climate Change Impacts on Irrigation Demand and Reservoir Evaporation in the West (Published February 6, 2015)
Source: U.S. Bureau of Reclamation
Climate Change Topics: Agriculture / Water supply, changes in supply, snowpack /
(Posted February 9, 2015)

 

West-Wide Climate Risk Assessments: Irrigation Demand and Reservoir Evaporation Projections

Report West-Wide Climate Risk Assessments: Irrigation Demand and Reservoir Evaporation Projections - "Reclamation has conducted an analysis of the potential changes in crop irrigation demand in eight major river basins in the West and projections of evaporation for 12 reservoirs within those river basins when considering observed and projected impacts of climate change. This report contains the results of that analysis." Reservoirs studied include Lake Shasta and Millerton Lake. Watersheds include the Sacramento-San Joaquin and Colorado River watersheds. Appendices (Published February 6, 2015)
Source: United States. Bureau of Reclamation
Climate Change Topics: Agriculture / California: Statewide / Water supply, changes in supply, snowpack /
(Posted February 9, 2015)

 

With climate change on the California Legislature's agenda, utilities 'making the rounds'

News article With climate change on the California Legislature's agenda, utilities 'making the rounds' (Published February 5, 2015)
Source: Sacramento Bee
Climate Change Topics: California: Statewide / Energy management and conservation /
(Posted February 5, 2015)

 

World Has Not Woken Up to Water Crisis Caused by Climate Change

News article World Has Not Woken Up to Water Crisis Caused by Climate Change (Published February 3, 2015)
Source: Scientific American
Climate Change Topics: Water supply, changes in supply, snowpack /
(Posted February 4, 2015)

 

Executive Order Establishing a Federal Flood Risk Management Standard and a Process for Further Soliciting and Considering Stakeholder Input

Report Executive Order Establishing a Federal Flood Risk Management Standard and a Process for Further Soliciting and Considering Stakeholder Input - Requires federal government agencies to take climate change into account in their flood management activities. (Published January 30, 2015)
Source: United States.
Climate Change Topics: Flooding / Sea level rise / Sea-Level and Flood Risks: FEMA or Insurance Industry Responses /
(Posted February 3, 2015)

 

Federal Construction Projects Must Plan for Flood Risks From Climate Change

News article Federal Construction Projects Must Plan for Flood Risks From Climate Change (Published January 31, 2015)
Source: New York Times
Climate Change Topics: Federal Regulations, EPA, Clean Air Act / Flooding /
(Posted February 2, 2015)

 

Impact of Climate Change on the Ecology of Algal Blooms

Report Impact of Climate Change on the Ecology of Algal Blooms - "The objectives were fourfold: 1. Determine how global warming could impact cyanobacterial abundance; 2. Determine the relative importance of temperature and nutrients in determining changes; in phytoplankton and cyanobacterial abundance; 3. Determine how different cyanobacterial taxa respond to temperature and nutrients; 4. Propose mitigation strategies to deal with cyanobacteria given the potential warmer temperatures in the future." -- Executive summary. (Published January 29, 2015)
Source: Water Research Foundation
Climate Change Topics: Water quality /
(Posted February 2, 2015)

 

Study: Climate change to bring more nasty La Ninas

News article Study: Climate change to bring more nasty La Ninas (Published January 30, 2015)
Source: USA Today
Climate Change Topics: Drought / Precipitation, Extreme Weather /
(Posted January 30, 2015)

 

Scientists see shrinking California snowpack as a harbinger

News article Scientists see shrinking California snowpack as a harbinger (Published January 30, 2015)
Source: Los Angeles Times
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted January 30, 2015)

 

Global warming won't mean more storms: Big storms to get bigger, small storms to shrink, experts predict

News article Global warming won't mean more storms: Big storms to get bigger, small storms to shrink, experts predict (Published January 29, 2015)
Source: Science Daily
Climate Change Topics: Drought / Precipitation, Extreme Weather /
(Posted January 29, 2015)

 

Climate scientists tackle 'unfinished business'

News article Climate scientists tackle 'unfinished business' (Published January 29, 2015)
Source: Environmental Research Web
Climate Change Topics: Temperature /
(Posted January 29, 2015)

 

Climate models don't over-predict warming, study shows

News article Climate models don't over-predict warming, study shows (Published January 29, 2015)
Source: Los Angeles Times
Climate Change Topics: Models and Tools / Temperature /
(Posted January 29, 2015)

 

Reclamation Releases Central Valley Project Integrated Resource Plan Final Report

News article Reclamation Releases Central Valley Project Integrated Resource Plan Final Report (Published January 27, 2015)
Source: U.S. Bureau of Reclamation
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted January 28, 2015)

 

Infographic: The Drier, Wetter, Warming U.S.

News article Infographic: The Drier, Wetter, Warming U.S. (Published January 28, 2015)
Source: Circle of Blue
Climate Change Topics: Drought / Precipitation, Extreme Weather /
(Posted January 28, 2015)

 

Climate Forecast: More Southwest Droughts and Australian Floods

News article Climate Forecast: More Southwest Droughts and Australian Floods (Published January 26, 2015)
Source: National Geographic
Climate Change Topics: California: Statewide / Drought /
(Posted January 27, 2015)

 

Nowhere to Go But Up: Increased Rate of Sea Level Rise Spurs Flood of New Ideas

News article Nowhere to Go But Up: Increased Rate of Sea Level Rise Spurs Flood of New Ideas (Published January 26, 2015)
Source: Bay Nature
Climate Change Topics: California: Bay Area and Delta / Land Use, environmental management systems, and regulation / Sea level rise /
(Posted January 27, 2015)

 

The massive scale of California's drought, and how it informs the climate change debate (Column)

News article The massive scale of California's drought, and how it informs the climate change debate (Column) (Published January 24, 2015)
Source: Washington Post
Climate Change Topics: California: Statewide / Drought /
(Posted January 26, 2015)

 

Managing Drought

Report Managing Drought - Videos from a PPIC conference. Topics: "Today's drought: harbinger of the future?" By state climatologist Mike Anderson, lessons from Australia, legislative priorities, managing urban and agricultural water scarcity, conserving ecosystems, allocating water. (Published January 12, 2015)
Source: Public Policy Institute of California
Climate Change Topics: California: Statewide / Drought /
(Posted January 26, 2015)

 

NOAA Fisheries Draft Climate Change Strategy

Report NOAA Fisheries Draft Climate Change Strategy - "Designed to increase the production, delivery, and use of climate-related information to marine and coastal resource managers, resource users and others at regional to national scales. Changes in ocean ecosystems are impacting the nation’s valuable living marine resources and the people, businesses and communities that depend on them. To fulfill its mission to sustain marine resources and their environments for the benefit of the nation, NOAA Fisheries and partners need additional information and tools to track, project and effectively respond to changing climate and ocean conditions." (Published January 23, 2015)
Source: United States. National Oceanic and Atmospheric Administration
Climate Change Topics: Ecosystems, Habitat, Threatened Species /
(Posted January 26, 2015)

 

Increases in flood magnitudes in California under warming climates

Report Increases in flood magnitudes in California under warming climates - "Downscaled and hydrologically modeled projections from an ensemble of 16 Global Climate Models suggest that flooding may become more intense on the western slopes of the Sierra Nevada mountains, the primary source for California’s managed water system. By the end of the 21st century, all 16 climate projections for the high greenhouse-gas emission SRES A2 scenario yield larger floods with return periods ranging 2-50 years for both the Northern Sierra Nevada and Southern Sierra Nevada, regardless of the direction of change in mean precipitation. By end of century, discharges from the Northern Sierra Nevada with 50-year return periods increase by 30-90% depending on climate model, compared to historical values. Corresponding flood flows from the Southern Sierra increase by 50-100%. The increases in simulated 50 year flood flows are larger (at 95% confidence level) than would be expected due to natural variability by as early as 2035 for the SRES A2 scenario." (Das, T., et al., 2013, Journal of Hydrology) (Published August 6, 2013)
Climate Change Topics: California: Statewide / Flooding / Water supply, changes in supply, snowpack /
(Posted January 22, 2015)

 

Sequestration on shaky ground: Natural impediment to long-term sequestration of carbon dioxide

News article Sequestration on shaky ground: Natural impediment to long-term sequestration of carbon dioxide (Published January 21, 2015)
Source: Science Daily
Climate Change Topics: Greenhouse gas (GHG) reduction, mitigation /
(Posted January 21, 2015)

 

Protecting California's natural lands is key to combating climate change (Opinion)

News article Protecting California's natural lands is key to combating climate change (Opinion) (Published January 21, 2015)
Source: Sacramento Bee
Climate Change Topics: California: Statewide / Land Use, environmental management systems, and regulation /
(Posted January 21, 2015)

 

Water stress takes toll on California's large trees, study says

News article Water stress takes toll on California's large trees, study says
Related Link: http://www.pnas.org/content/early/2015/01/14/1410186112
(Published January 20, 2015)
Source: Los Angeles Times
Climate Change Topics: California: Statewide / Ecosystems, Habitat, Threatened Species /
(Posted January 20, 2015)

 

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