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Climate Change Blog

 

Community Choice Aggregation

Report Community Choice Aggregation - Memo on a new method for developing an alternative, local energy supply, from Chief Operating Officer Jim Fiedler to the SCVWD Board. (Published April 29, 2014)
Source: Santa Clara Valley Water District
Climate Change Topics: Energy management and conservation / Santa Clara Valley Water District staff presentations /
(Posted September 16, 2014)

 

Why More Trees in the Sierra Mean Less Water for California

News article Why More Trees in the Sierra Mean Less Water for California (Published September 15, 2014)
Source: KQED Radio
Climate Change Topics: Water supply, changes in supply, snowpack / California: Statewide /
(Posted September 15, 2014)

 

Rules of thumb for climate change turned upside down: Wet and dry regions recalculated

News article Rules of thumb for climate change turned upside down: Wet and dry regions recalculated (Published September 14, 2014)
Source: Science Daily
Climate Change Topics: Drought / Precipitation, Extreme Weather / Water supply, changes in supply, snowpack /
(Posted September 15, 2014)

 

Effective Climate Change Communication for Water Utilities

Report Effective Climate Change Communication for Water Utilities - "This project produced a guidance document to assist water utilities in communicating about climate change, with an emphasis on building support for water utility climate-related adaptation or mitigation investments or projects. A message mapping worksheet is included within the report to help water agencies develop messages that will build long-term support for their specific climate-related actions. The worksheet is also available under Project Resources/Project Papers as a Microsoft Word template for utilities to build their own message mapping strategy. Lastly, the project produced a video to provide water professionals with the information they need to understand the relationship among water, water utility needs, and climate change. Links to the video are available in the report and Executive Summary." (Published September 12, 2014)
Source: Water Research Foundation
Climate Change Topics: Water utilities guidance /
(Posted September 15, 2014)

 

2014 California Adaptation Forum Videos and Presentations

Report 2014 California Adaptation Forum Videos and Presentations - Updates on adaptation (Published August 20, 2014)
Climate Change Topics: Adaptation / California: Statewide / Drought / Ecosystems, Habitat, Threatened Species / Energy management and conservation / Flooding / Land Use, environmental management systems, and regulation / Sea level rise /
(Posted September 12, 2014)

 

Early Spring, Severe Frost Events, and Drought Induce Rapid Carbon Loss in High Elevation Meadows

Report Early Spring, Severe Frost Events, and Drought Induce Rapid Carbon Loss in High Elevation Meadows - "By the end of the 20th century, the onset of spring in the Sierra Nevada mountain range of California has been occurring on average three weeks earlier than historic records. Superimposed on this trend is an increase in the presence of highly anomalous 'extreme' years, where spring arrives either significantly late or early. The timing of the onset of continuous snowpack coupled to the date at which the snowmelt season is initiated play an important role in the development and sustainability of mountain ecosystems. In this study, we assess the impact of extreme winter precipitation variation on aboveground net primary productivity and soil respiration over three years (2011 to 2013). We found that the duration of snow cover, particularly the timing of the onset of a continuous snowpack and presence of early spring frost events contributed to a dramatic change in ecosystem processes. We found an average 100% increase in soil respiration in 2012 and 2103, compared to 2011, and an average 39% decline in aboveground net primary productivity observed over the same time period. The overall growing season length increased by 57 days in 2012 and 61 days in 2013. These results demonstrate the dependency of these keystone ecosystems on a stable climate and indicate that even small changes in climate can potentially alter their resiliency." (Arnold, C., 2014, PLoS One) (Published September 10, 2014)
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted September 12, 2014)

 

Calif. Plans Nation's Most Detailed Sea Level Database

News article Calif. Plans Nation's Most Detailed Sea Level Database (Published September 11, 2014)
Source: Climate Central
Climate Change Topics: California: Statewide / Sea level rise /
(Posted September 11, 2014)

 

Researchers link climate change, vegetation and water

News article Researchers link climate change, vegetation and water (Published September 9, 2014)
Source: Fresno Bee
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted September 10, 2014)

 

Ontogeny influences sensitivity to climate change stressors in an endangered fish

Report Ontogeny influences sensitivity to climate change stressors in an endangered fish - "In the San Francisco Estuary, the Delta Smelt (Hypomesus transpacificus) is an endemic, endangered fish strongly tied to Californian conservation planning. The complex life history of Delta Smelt combined with dynamic seasonal and spatial abiotic conditions result in dissimilar environments experienced among ontogenetic stages, which may yield stage-specific susceptibility to abiotic stressors. Climate change is forecasted to increase San Francisco Estuary water temperature and salinity; therefore, understanding the influences of ontogeny and phenotypic plasticity on tolerance to these critical environmental parameters is particularly important for Delta Smelt and other San Francisco Estuary fishes. We assessed thermal and salinity limits in several ontogenetic stages and acclimation states of Delta Smelt, and paired these data with environmental data to evaluate sensitivity to climate-change stressors. Thermal tolerance decreased among successive stages, with larval fish exhibiting the highest tolerance and post-spawning adults having the lowest. Delta Smelt had limited capacity to increase tolerance through thermal acclimation, and comparisons with field temperature data revealed that juvenile tolerance limits are the closest to current environmental conditions, which may make this stage especially susceptible to future climate warming." (Komoroske, L. M., et al., 2014, Conservation Physiology) (Published January 20, 2014)
Climate Change Topics: California: Bay Area and Delta / Ecosystems, Habitat, Threatened Species /
(Posted September 10, 2014)

 

Climate, Drought, and Change

Report Climate, Drought, and Change - "California possesses a uniquely variable Mediterranean climate that relies on a few big winter storms to build a snowpack that provides spring runoff to the Delta watershed. Over the past three water years, fewer storms than expected have hit the state leading to severe drought conditions with some record-setting characteristics. This seminar will examine the meteorology and hydrology of the past three water years and place current conditions within the context of observed decadal variation and longer historical climate records." Presentation by state climatologist Michael Anderson. (Published August 25, 2014)
Source: Delta Stewardship Council
Climate Change Topics: California: Bay Area and Delta / California: Statewide / Drought / Water supply, changes in supply, snowpack /
(Posted September 10, 2014)

 

U.N. climate agency reports carbon dioxide growing at alarming rate

News article U.N. climate agency reports carbon dioxide growing at alarming rate (Published September 10, 2014)
Source: Los Angeles Times
Climate Change Topics: Greenhouse gas (GHG) increases /
(Posted September 9, 2014)

 

Climate change threatens many of the nation's bird species

News article Climate change threatens many of the nation's bird species (Published September 9, 2014)
Source: San Jose Mercury News
Climate Change Topics: Ecosystems, Habitat, Threatened Species /
(Posted September 9, 2014)

 

A slow-motion disaster gnaws at US shores as sea level rises

News article A slow-motion disaster gnaws at US shores as sea level rises (Published September 4, 2014)
Source: Reuters
Climate Change Topics: Sea level rise /
(Posted September 5, 2014)

 

More Trees Means Less Water for California's Mountain Rivers

News article More Trees Means Less Water for California's Mountain Rivers (Published September 1, 2014)
Source: Circle of Blue
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted September 5, 2014)

 

Q&A: Does Sacramento face a future of water shortages?

News article Q&A: Does Sacramento face a future of water shortages? (Published September 2, 2014)
Source: Sacramento Bee
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted September 2, 2014)

 

As California Warms, Greener Mountains Will Mean Less Water for People

News article As California Warms, Greener Mountains Will Mean Less Water for People (Published September 1, 2014)
Source: National Geographic
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted September 2, 2014)

 

Assessing the risk of persistent drought using climate model simulations and paleoclimate data

Report Assessing the risk of persistent drought using climate model simulations and paleoclimate data - "Projected changes in global rainfall patterns will likely alter water supplies and ecosystems in semiarid regions during the coming century. Instrumental and paleoclimate data indicate that natural hydroclimate fluctuations tend to be more energetic at low (multidecadal to multicentury) than at high (interannual) frequencies. State-of-the-art global climate models do not capture this characteristic of hydroclimate variability, suggesting that the models underestimate the risk of future persistent droughts. Methods are developed here for assessing the risk of such events in the coming century using climate model projections as well as observational (paleoclimate) information. Where instrumental and paleoclimate data are reliable, these methods may provide a more complete view of prolonged drought risk. In the US Southwest, for instance, state-of-the-art climate model projections suggest the risk of a decade-scale megadrought in the coming century is less than 50%; our analysis suggests that the risk is at least 80%, and may be higher than 90% in certain areas. The likelihood of longer lived events (> 35 years) is between 20% and 50%, and the risk of an unprecedented 50 year megadrought is non-negligible under the most severe warming scenario (5-10%). These findings are important to consider as adaptation and mitigation strategies are developed to cope with regional impacts of climate change, where population growth is high and multidecadal megadrought -- worse than anything seen during the last 2000 years -- would pose unprecedented challenges to water resources in the region." (Ault, T. R., et al., 2014, Journal of Climate) (Published January 22, 2014)
Climate Change Topics: Drought /
(Posted September 2, 2014)

 

Mountain runoff vulnerability to increased evapotranspiration with vegetation expansion

Report Mountain runoff vulnerability to increased evapotranspiration with vegetation expansion - "Climate change has the potential to reduce the supply of surface water by accelerating mountain vegetation growth and evapotranspiration (ET), though the likelihood and severity of this effect are poorly known. We used the upper Kings River basin in California's Sierra Nevada as a case study of the sensitivity of runoff to increased ET with warming. We found that Kings River flow is highly sensitive to vegetation expansion; warming projected for 2100 could increase ET across the Kings River watershed by 28% and decrease riverflow by 26%. Moreover, we found a consistent relationship between watershed ET and temperature across the Sierra Nevada; this consistency implies a potential widespread reduction in water supply with warming, with important implications for California's economy and environment." (Goulden, M. L. and R. C. Bales, 2014, Proceedings of the National Academy of Sciences) (Published September 2, 2014)
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted September 2, 2014)

 

Does Antarctic sea ice growth negate climate change? Scientists say no

News article Does Antarctic sea ice growth negate climate change? Scientists say no (Published August 29, 2014)
Source: Los Angeles Times
Climate Change Topics: Sea and Polar ice /
(Posted August 29, 2014)

 

Global warming slowdown answer lies in depths of Atlantic, study finds

News article Global warming slowdown answer lies in depths of Atlantic, study finds (Published August 29, 2014)
Source: Environmental Research Web
Climate Change Topics: Temperature /
(Posted August 29, 2014)

 

U.N. Draft Report Lists Unchecked Emissions' Risks (IPCC)

News article U.N. Draft Report Lists Unchecked Emissions' Risks (IPCC) (Published August 27, 2014)
Source: New York Times
Climate Change Topics: Agriculture / Global issues, human impacts / Greenhouse gas (GHG) increases / Politics, laws, United Nations, etc. / Sea and Polar ice / Temperature /
(Posted August 28, 2014)

 

Southwest U.S. may face 'megadrought' this century

News article Southwest U.S. may face 'megadrought' this century (Published August 27, 2014)
Source: Science Daily
Climate Change Topics: Drought /
(Posted August 28, 2014)

 

Stream Temperature Variability: Why It Matters to Salmon

Report Stream Temperature Variability: Why It Matters to Salmon - "Salmon evolved in natural river systems, where temperatures fluctuate daily, weekly, seasonally, and all along a stream’s path -- from the mountains to the sea. Climate change and human activities alter this natural variability. Dams, for example, tend to reduce thermal fluctuations. Currently, scientists gauge habitat suitability for aquatic species by establishing minimum/maximum temperature thresholds and relying on mean temperature readings to establish management priorities. But temperature effects on salmon are more complex. A new study demonstrates that temperature variability can affect emergence timing in Chinook salmon, potentially altering predictions about how these fish may respond to a changing climate. It also reveals that genetics can make a difference in how an individual responds to stream temperature variance." (Published July 11, 2014)
Source: United States. Forest Service
Climate Change Topics: Ecosystems, Habitat, Threatened Species /
(Posted August 28, 2014)

 

Climate Prediction Center GIS Portal

Report Climate Prediction Center GIS Portal - Displays precipitation, sea-surface temperature, and global forecast system data on a world map. (Published )
Source: United States. National Weather Service
Climate Change Topics: Models and Tools / Precipitation, Extreme Weather / Temperature /
(Posted August 28, 2014)

 

National Adaptation Forum Webinar Series: Live from the California Adaptation Forum

Report National Adaptation Forum Webinar Series: Live from the California Adaptation Forum - Audio from the forum, Aug. 20, 2014 (1 hour) (Published August 20, 2014)
Climate Change Topics: Adaptation / California: Statewide /
(Posted August 28, 2014)

 

Sea Level Rise: A Slow-Moving Emergency

Report Sea Level Rise: A Slow-Moving Emergency - Among the findings: Key segments of the economy are at risk, infrastructure is at risk, extreme storms and king tides add to vulnerability, saltwater intrusion and erosions are problems. (California State Assembly Select Committee Sea Level Rise and the California Economy, Aug. 2014) (Published August 1, 2014)
Source: California. Legislature
Climate Change Topics: California: Statewide / Flooding / Precipitation, Extreme Weather / Sea level rise /
(Posted August 26, 2014)

 

Climate change and drought are forcing us to upgrade our water systems

News article Climate change and drought are forcing us to upgrade our water systems (Published August 24, 2014)
Source: Living on Earth
Climate Change Topics: Water supply, changes in supply, snowpack / Water utilities guidance /
(Posted August 25, 2014)

 

Climate Change Could Happen Slower for the Next Decade, Study Says

News article Climate Change Could Happen Slower for the Next Decade, Study Says (Published August 22, 2014)
Source: Time magazine
Climate Change Topics: Temperature /
(Posted August 25, 2014)

 

Sunlight, not microbes, key to carbon dioxide in Arctic

News article Sunlight, not microbes, key to carbon dioxide in Arctic (Published August 22, 2014)
Source: Science Daily
Climate Change Topics: Greenhouse gas (GHG) increases /
(Posted August 22, 2014)

 

2030 could be 'cross-over year' for climate change responsibility

News article 2030 could be 'cross-over year' for climate change responsibility (Published August 20, 2014)
Source: Environmental Research Web
Climate Change Topics: Adaptation / Greenhouse gas (GHG) reduction, mitigation /
(Posted August 20, 2014)

 

Sun's activity influences natural climate change, ice age study shows

News article Sun's activity influences natural climate change, ice age study shows (Published August 19, 2014)
Source: Science Daily
Climate Change Topics: Temperature /
(Posted August 19, 2014)

 

Ocean warming could drive heavy rain bands toward poles

News article Ocean warming could drive heavy rain bands toward poles (Published August 19, 2014)
Source: Science Daily
Climate Change Topics: Precipitation, Extreme Weather /
(Posted August 19, 2014)

 

Using State Revolving Funds to Build Climate-Resilient Communities

Report Using State Revolving Funds to Build Climate-Resilient Communities - "Incorporating water efficiency and green infrastructure and addressing flood risks in SRF-supported projects will not only help communities meet their existing water infrastructure needs but also better equip them to handle storms, floods, droughts, and other extreme weather events in the future." (Published June 18, 2014)
Source: Natural Resources Defense Council
Climate Change Topics: Adaptation / Drought / Flooding / Precipitation, Extreme Weather / Water utilities guidance /
(Posted August 15, 2014)

 

Extreme weather becoming more common, study says

News article Extreme weather becoming more common, study says (Published August 11, 2014)
Source: Guardian (U.K.)
Climate Change Topics: Precipitation, Extreme Weather /
(Posted August 13, 2014)

 

Water vapour rise is due to man

News article Water vapour rise is due to man (Published August 11, 2014)
Source: Environmental Research Web
Climate Change Topics: Clouds, aerosols, air pollution, ozone, humidity /
(Posted August 12, 2014)

 

Climate warming may have unexpected impact on invasive species, study finds

News article Climate warming may have unexpected impact on invasive species, study finds (Published August 7, 2014)
Source: Science Daily
Climate Change Topics: Ecosystems, Habitat, Threatened Species /
(Posted August 8, 2014)

 

Resources Agency Releases Updated Climate Change Assessment

News article Resources Agency Releases Updated Climate Change Assessment (Published August 4, 2014)
Source: Association of California Water Agencies
Climate Change Topics: AB 32 / Adaptation / California: Statewide / Greenhouse gas (GHG) reduction, mitigation /
(Posted August 5, 2014)

 

Huge waves measured for first time in Arctic Ocean

News article Huge waves measured for first time in Arctic Ocean (Published July 29, 2014)
Source: Science Daily
Climate Change Topics: Sea and Polar ice /
(Posted August 4, 2014)

 

Atlantic warming turbocharges Pacific trade winds

News article Atlantic warming turbocharges Pacific trade winds (Published August 3, 2014)
Source: Science Daily
Climate Change Topics: Precipitation, Extreme Weather /
(Posted August 4, 2014)

 

State Releases Final Safeguarding California Plan for Reducing Climate Risk

News article State Releases Final Safeguarding California Plan for Reducing Climate Risk
Related Link: http://www.resources.ca.gov/docs/climate/Final_Safeguarding_CA_Plan_July_31_2014.pdf
(Published July 31, 2014)
Source: California Natural Resources Agency
Climate Change Topics: Adaptation / California: Statewide /
(Posted August 1, 2014)

 

Safeguarding California: Reducing Climate Risk

Report Safeguarding California: Reducing Climate Risk - An update to the 2009 California Climate Adaptation Strategy. (Published July 31, 2014)
Source: California. Natural Resources Agency
Climate Change Topics: Adaptation / Agriculture / California: Statewide / Ecosystems, Habitat, Threatened Species / Energy management and conservation / Sea level rise / Water supply, changes in supply, snowpack /
(Posted August 1, 2014)

 

Predicting thermal vulnerability of stream and river ecosystems to climate change

Report Predicting thermal vulnerability of stream and river ecosystems to climate change - "We use a predictive model of mean summer stream temperature to assess the vulnerability of USA streams to thermal alteration associated with climate change. The model uses air temperature and watershed features (e.g., watershed area and slope) from 569 US Geological Survey sites in the conterminous USA to predict stream temperatures. We assess the model for predicting climate-related variation in stream temperature by comparing observed and predicted historical stream temperature changes. Analysis of covariance confirms that observed and predicted changes in stream temperatures respond similarly to historical changes in air temperature. When applied to spatially-downscaled future air temperature projections (A2 emission scenario), the model predicts mean warming of 2.2 degrees C for the conterminous USA by 2100. Stream temperatures are most responsive to climate changes in the Cascade and Appalachian Mountains and least responsive in the southeastern USA. We then use random forests to conduct an empirical sensitivity analysis to identify those stream features most strongly associated with both observed historical and predicted future changes in summer stream temperatures. Larger changes in stream temperature are associated with warmer future air temperatures, greater air temperature changes, and larger watershed areas. Smaller changes in stream temperature are predicted for streams with high initial rates of heat loss associated with longwave radiation and evaporation, and greater base-flow index values. These models provide important insight into the potential extent of stream temperature warming at a near-continental scale and why some streams will likely be more vulnerable to climate change than others." (Hill, R. A., et al., 2014, Climatic Change) (Published June 25, 2014)
Climate Change Topics: Ecosystems, Habitat, Threatened Species / Temperature /
(Posted August 1, 2014)

 

Global warming amplifier: Rising water vapor in upper troposphere to intensify climate change

News article Global warming amplifier: Rising water vapor in upper troposphere to intensify climate change (Published July 28, 2014)
Source: Science Daily
Climate Change Topics: Clouds, aerosols, air pollution, ozone, humidity /
(Posted July 31, 2014)

 

Annoying minor floods are increasing on U.S. coasts

News article Annoying minor floods are increasing on U.S. coasts (Published July 28, 2014)
Source: Associated Press
Climate Change Topics: Flooding / Sea level rise /
(Posted July 29, 2014)

 

Water vapour link to global warming

News article Water vapour link to global warming (Published July 29, 2014)
Source: Yahoo News
Climate Change Topics: Clouds, aerosols, air pollution, ozone, humidity / Greenhouse gas (GHG) increases /
(Posted July 29, 2014)

 

Water/Wastewater Utilities and Extreme Climate and Weather Events: Case Studies on Community Response, Lessons Learned, Adaptation, and Planning Needs for the Future

Report Water/Wastewater Utilities and Extreme Climate and Weather Events: Case Studies on Community Response, Lessons Learned, Adaptation, and Planning Needs for the Future - Examined six utilities that experience various kinds of extreme weather (including floods and droughts) and how they manage. (Case studies) (Published July 21, 2014)
Source: Water Research Foundation
Climate Change Topics: Adaptation / Drought / Flooding / Sea level rise / Water supply, changes in supply, snowpack / Water utilities guidance /
(Posted July 28, 2014)

 

San Francisco breaks heat record amid California drought, heat wave

News article San Francisco breaks heat record amid California drought, heat wave (Published July 25, 2014)
Source: Los Angeles Times
Climate Change Topics: California: Bay Area and Delta / California: Statewide / Temperature /
(Posted July 25, 2014)

 

Monterey Bay buoy records record-high water temperature

News article Monterey Bay buoy records record-high water temperature (Published July 24, 2014)
Source: KSBW (Salinas)
Climate Change Topics: California: Statewide / Temperature /
(Posted July 25, 2014)

 

Bureau of Reclamation Releases New Hydrologic Projections for Contiguous United States

News article Bureau of Reclamation Releases New Hydrologic Projections for Contiguous United States
Related Link: http://gdo-dcp.ucllnl.org/downscaled_cmip_projections/
(Published July 22, 2014)
Source: Association of California Water Agencies
Climate Change Topics: Models and Tools / Precipitation, Extreme Weather / Temperature / Water supply, changes in supply, snowpack /
(Posted July 23, 2014)

 

Climate Change Research Catalog

Report Climate Change Research Catalog - "The Climate Change Research Catalog contains information about research projects supported by state government, including the project name and year, budget, principal investigators, and a short description. The Catalog is a resource for researchers, the public, and State agency staff, created to disseminate results and identify opportunities for collaboration and further study." (Published )
Source: California.
Climate Change Topics: Agriculture / California: Statewide / Ecosystems, Habitat, Threatened Species / Energy management and conservation / Greenhouse gas (GHG) increases / Greenhouse gas (GHG) reduction, mitigation / Research / Sea level rise / Temperature / Water supply, changes in supply, snowpack /
(Posted July 23, 2014)

 

Science Brings Clarity to Shifting Shores

News article Science Brings Clarity to Shifting Shores
Related Link: http://marine.usgs.gov/coastalchangehazardsportal/
(Published July 16, 2014)
Source: U.S. Geological Survey
Climate Change Topics: Sea level rise /
(Posted July 22, 2014)

 

USGS Coastal Change Hazards Portal

Report USGS Coastal Change Hazards Portal - Shows degress of risk from extreme storms, shoreline change, sea-level rise. (Published July 16, 2014)
Source: United States. Geological Survey
Climate Change Topics: Models and Tools / Precipitation, Extreme Weather / Sea level rise /
(Posted July 22, 2014)

 

Drought hinders state's emissions goals

News article Drought hinders state's emissions goals (Published July 20, 2014)
Source: San Francisco Chronicle
Climate Change Topics: AB 32 / California: Statewide / Drought / Greenhouse gas (GHG) reduction, mitigation /
(Posted July 21, 2014)

 

CivicSpark is Now Taking Applications for Local Government Climate Change Response Support

News article CivicSpark is Now Taking Applications for Local Government Climate Change Response Support (Published July 14, 2014)
Source: Association of California Water Agencies
Climate Change Topics: Adaptation / California: Statewide / Greenhouse gas (GHG) reduction, mitigation /
(Posted July 15, 2014)

 

Governing California Through Climate Change

Report Governing California Through Climate Change - "1. The Governor should direct his administration . . . to establish the best state science on anticipated climate change impacts and help decision-makers accurately assess their climate risks based on that science. 2. State government at all levels should further incorporate climate risk assessment into everyday public planning and governing processes throughout California. 3. The Legislature should expand the primary mission of the Strategic Growth Council beyond mitigation of greenhouse gas emissions through the SB 375 Sustainable Communities Strategy to include an equal focus on climate change adaptation in California. The Council's operating guidelines and charge to support planning and development of 'sustainable communities' should stretch to include the ability to identify and address climate impacts appropriate to the community or region. 4. State government should work with counties, private insurers, wildland stakeholders and the building industry to minimize wildfires and property damage by more aggressively enforcing defensible space requirements existing in state law. The state and stakeholders should promote Ventura County’s success in enforcing compliance and reducing wildfire costs and damage as a climate change model for wildland urban interface areas. 5. The Governor should work with key state agencies . . . to clarify the impact of sea level rise on California's Common Law Public Trust Doctrine. A collective dialogue should seek ways to create a legal framework in advance of crisis and prevent litigation and instability as a rising ocean begins to condemn private property on the Pacific coastline." (Published July 10, 2014)
Source: California. Little Hoover Commission
Climate Change Topics: California: Statewide / Land Use, environmental management systems, and regulation / SB 375 / Sea level rise / Wildfires /
(Posted July 14, 2014)

 

Our Coast, Our Future

Report Our Coast, Our Future - Contains "modeling results for sea level rise and storm surge in the San Francisco Bay area." From a consortium of government agencies and nonprofits. (Published )
Climate Change Topics: California: Bay Area and Delta / Models and Tools / Sea level rise /
(Posted July 14, 2014)

 

Recent Talk on Sea Level Rise Stresses Need for Acceptance and Adaptation

News article Recent Talk on Sea Level Rise Stresses Need for Acceptance and Adaptation (Published July 4, 2014)
Source: KQED Radio
Climate Change Topics: Adaptation / California: Bay Area and Delta / Sea level rise /
(Posted July 7, 2014)

 

Response surfaces of vulnerability to climate change: the Colorado River Basin, the High Plains, and California

Report Response surfaces of vulnerability to climate change: the Colorado River Basin, the High Plains, and California - "We quantify the vulnerability of water supply to shortage for the Colorado River Basin and basins of the High Plains and California and assess the sensitivity of their water supply system to future changes in the statistical variability of supply and demand. We do so for current conditions and future socio-economic scenarios within a probabilistic framework that incorporates the inherent uncertainties in the drivers of vulnerability. Our analysis indicates that the most sensitive basins to both current and future variability of demand and supply are the Central California and the San Joaquin-Tulare basins. Large sensitivity is also found for the Kansas basin of the High Plains. Within the Colorado River Basin, the Lower Colorado and Gila were found to be the most vulnerable and sensitive sub-basins. By accounting for future uncertainty within the above probabilistic framework, this study unveils and isolates the individual responses of a given basin to changes in the statistical properties of demand and supply and offers a valuable tool for the identification of policy strategies and adaptation measures." (Foti, R., et al., 2014, Climatic Change) (Published June 30, 2014)
Climate Change Topics: California: Statewide / Groundwater / Water supply, changes in supply, snowpack /
(Posted July 1, 2014)

 

San Mateo County Planners Grapple With Expected 3-Foot Sea Level Rise

News article San Mateo County Planners Grapple With Expected 3-Foot Sea Level Rise (Published June 27, 2014)
Source: CBS 5 (KPIX)
Climate Change Topics: California: Bay Area and Delta / Sea level rise /
(Posted June 30, 2014)

 

U.S. drought could spark economic water warfare (Column)

News article U.S. drought could spark economic water warfare (Column) (Published June 26, 2014)
Source: Reuters
Climate Change Topics: Drought / Water-Supply Related Risks: Insurance Industry Responses /
(Posted June 30, 2014)

 

'Risky Business' Report Says Two Things about Water -- One Is Obvious, the Other Is Not

News article 'Risky Business' Report Says Two Things about Water -- One Is Obvious, the Other Is Not (Published June 26, 2014)
Source: Circle of Blue
Climate Change Topics: Agriculture / Drought / Energy management and conservation / Global issues, human impacts / Sea level rise / Temperature /
(Posted June 30, 2014)

 

Climate change: The peril is in all the things we don't know (Opinion)

News article Climate change: The peril is in all the things we don't know (Opinion) (Published June 25, 2014)
Source: Los Angeles Times
Climate Change Topics: Ecosystems, Habitat, Threatened Species /
(Posted June 25, 2014)

 

Money men tally cost of climate change

News article Money men tally cost of climate change
Related Link: http://riskybusiness.org/
(Published June 24, 2014)
Source: Associated Press
Climate Change Topics: Agriculture / Drought / Flooding / Sea level rise / Temperature /
(Posted June 24, 2014)

 

Risky Business: The Economic Risks of Climate Change in the United States

Report Risky Business: The Economic Risks of Climate Change in the United States - "The American economy could face significant and widespread disruptions from climate change unless U.S. businesses and policymakers take immediate action to reduce climate risk. … The report … summarizes findings of an independent assessment of the impact of climate change at the county, state, and regional level, and shows that communities, industries, and properties across the U.S. face profound risks from climate change. The findings also show that the most severe risks can still be avoided through early investments in resilience, and through immediate action to reduce the pollution that causes global warming. The Risky Business report shows that two of the primary impacts of climate change -- extreme heat and sea level rise -- will disproportionately affect certain regions of the U.S., and pose highly variable risks across the nation. In the U.S. Gulf Coast, Northeast, and Southeast, for example, sea level rise and increased damage from storm surge are likely to lead to an additional $2 to $3.5 billion in property losses each year by 2030, with escalating costs in future decades. In interior states in the Midwest and Southwest, extreme heat will threaten human health, reduce labor productivity and strain electricity grids." (Published June 24, 2014)
Climate Change Topics: Agriculture / Flooding / Global issues, human impacts / Sea level rise / Temperature /
(Posted June 24, 2014)

 

Extreme Weather in the United States Linked to Wave-Like Wind Pattern Variations

News article Extreme Weather in the United States Linked to Wave-Like Wind Pattern Variations (Published June 23, 2014)
Source: Science World Report
Climate Change Topics: Precipitation, Extreme Weather /
(Posted June 23, 2014)

 

Extent of the rain-snow transition zone in the western U.S. under historic and projected climate

Report Extent of the rain-snow transition zone in the western U.S. under historic and projected climate - "This study investigates the extent of the rain-snow transition zone across the complex terrain of the western United States for both late 20th century climate and projected changes in climate by the mid-21st century. Observed and projected temperature and precipitation data at 4?km-resolution were used with an empirical probabilistic precipitation phase model to estimate and map the likelihood of snow versus rain occurrence. This approach identifies areas most likely to undergo precipitation phase change over the next half century. At broad scales, these projections indicate an average 30 percent decrease in areal extent of winter wet-day temperatures conducive to snowfall over the western United States. At higher resolution scales, this approach identifies existing and potential experimental sites best suited for research investigating the mechanisms linking precipitation phase change to a broad array of processes, such as shifts in rain-on-snow flood risk, timing of water resource availability, and ecosystem dynamics." (Klos, P. Z., et al., 2014, Geophysical Research Letters) (Published June 11, 2014)
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted June 23, 2014)

 

How the insurance industry sees climate change (Opinion)

News article How the insurance industry sees climate change (Opinion) (Published June 17, 2014)
Source: Los Angeles Times
Climate Change Topics: Sea-Level and Flood Risks: FEMA or Insurance Industry Responses /
(Posted June 18, 2014)

 

California, Oregon, Washington and the Surging Sea: A Vulnerability Assessment with Projections for Sea Level Rise and Coastal Flood Risk

Report California, Oregon, Washington and the Surging Sea: A Vulnerability Assessment with Projections for Sea Level Rise and Coastal Flood Risk - Makes projections of ea level rise which leads to an analysis of coastal flooding and the risk to people, property, and infrastructure on the West Coast. Used with the online application Surging Seas (Climate Central) (Published June 10, 2014)
Climate Change Topics: California: Statewide / Flooding / Sea level rise /
(Posted June 17, 2014)

 

Vanishing water: an already strained water supply, threatened by climate change (Colorado River)

News article Vanishing water: an already strained water supply, threatened by climate change (Colorado River) (Published June 14, 2014)
Source: Desert Sun (MyDesert.com)
Climate Change Topics: Streamflow / Water supply, changes in supply, snowpack /
(Posted June 16, 2014)

 

Cities must prepare for climate change or get sued (Editorial)

News article Cities must prepare for climate change or get sued (Editorial) (Published June 14, 2014)
Source: San Francisco Chronicle
Climate Change Topics: Sea-Level and Flood Risks: FEMA or Insurance Industry Responses /
(Posted June 16, 2014)

 

Climate change would drown parts of San Mateo County (Opinion)

News article Climate change would drown parts of San Mateo County (Opinion) (Published June 14, 2014)
Source: San Francisco Chronicle
Climate Change Topics: California: Bay Area and Delta / Sea level rise /
(Posted June 16, 2014)

 

Interactive Map: How Sea Level Rise Could Swamp Coastal Communities

News article Interactive Map: How Sea Level Rise Could Swamp Coastal Communities (Published June 13, 2014)
Source: KQED Radio
Climate Change Topics: California: Bay Area and Delta / Sea level rise /
(Posted June 16, 2014)

 

California seeing hottest year on record thus far

News article California seeing hottest year on record thus far (Published June 13, 2014)
Source: San Francisco Chronicle
Climate Change Topics: California: Statewide / Temperature /
(Posted June 13, 2014)

 

When the sea levels rise in the Bay, where will it hurt in Oakland?

News article When the sea levels rise in the Bay, where will it hurt in Oakland? (Published June 13, 2014)
Source: Oakland Local
Climate Change Topics: California: Bay Area and Delta / Sea level rise /
(Posted June 13, 2014)

 

How Earth avoided global warming, last time around

News article How Earth avoided global warming, last time around (Published June 11, 2014)
Source: Science Daily
Climate Change Topics: Greenhouse gas (GHG) increases / Greenhouse gas (GHG) reduction, mitigation /
(Posted June 13, 2014)

 

This Silicon Valley City Will Be Flooded Every Year as Sea Levels Rise (Foster City)

News article This Silicon Valley City Will Be Flooded Every Year as Sea Levels Rise (Foster City) (Published June 11, 2014)
Source: Yahoo News
Climate Change Topics: California: Bay Area and Delta / Sea level rise /
(Posted June 11, 2014)

 

S.F. waterfront development must prepare for rising seas (Column)

News article S.F. waterfront development must prepare for rising seas (Column) (Published June 8, 2014)
Source: San Francisco Chronicle
Climate Change Topics: California: Bay Area and Delta / Sea level rise /
(Posted June 9, 2014)

 

Climate Change Indicators in the United States, 2014

Report Climate Change Indicators in the United States, 2014 - "EPA's Climate Change Indicators in the United States, 2014, presents compelling evidence that the impacts of climate change are already occurring across the United States." The report uses 30 key indicators of climate change. (Published May 28, 2014)
Source: United States. Environmental Protection Agency
Climate Change Topics: Drought / Ecosystems, Habitat, Threatened Species / Global issues, human impacts / Greenhouse gas (GHG) increases / Precipitation, Extreme Weather / Sea and Polar ice / Sea level rise / Streamflow / Temperature / Water supply, changes in supply, snowpack /
(Posted June 6, 2014)

 

A precipitation shift from snow towards rain leads to a decrease in streamflow

Report A precipitation shift from snow towards rain leads to a decrease in streamflow - "In a warming climate, precipitation is less likely to occur as snowfall. A shift from a snow- towards a rain-dominated regime is currently assumed not to influence the mean streamflow significantly. Contradicting the current paradigm, we argue that mean streamflow is likely to reduce for catchments that experience significant reductions in the fraction of precipitation falling as snow. With more than one-sixth of the Earth’s population depending on meltwater for their water supply and ecosystems that can be sensitive to streamflow alterations, the socio-economic consequences of a reduction in streamflow can be substantial. By applying the Budyko water balance framework to catchments located throughout the contiguous United States we demonstrate that a higher fraction of precipitation falling as snow is associated with higher mean streamflow, compared to catchments with marginal or no snowfall. Furthermore, we show that the fraction of each year’s precipitation falling as snowfall has a significant influence on the annual streamflow within individual catchments. This study is limited to introducing these observations; process-based understanding at the catchment scale is not yet provided. Given the importance of streamflow for society, further studies are required to respond to the consequences of a temperature-induced precipitation shift from snow to rain." (Berghuijs, W. R., et al., 2014, Nature) (Published May 18, 2014)
Climate Change Topics: Streamflow / Water supply, changes in supply, snowpack /
(Posted June 6, 2014)

 

Southwest Climate and Environmental Information Collaborative (SCENIC)

Report Southwest Climate and Environmental Information Collaborative (SCENIC) - Look up current and historic climate data, such as temperature, precipitation, snowfall, pan evaporation. Use tools to display your data. Check the climate dashboard for current conditions regionally and nationally. (Southwest Climate Science Center) (Published )
Climate Change Topics: Drought / Models and Tools / Precipitation, Extreme Weather / Temperature /
(Posted June 6, 2014)

 

Next Steps for Managing Freshwater Resources in a Changing Climate

Report Next Steps for Managing Freshwater Resources in a Changing Climate - Follow-up to 2011 report advising the federal government on water data, vulnerability assessment, water use efficiency, integrated water resources management, and training and capacity building. (Published April 10, 2014)
Source: United States.
Climate Change Topics: Water utilities guidance /
(Posted June 6, 2014)

 

US Hottest Spots of Warming: Northeast, Southwest

News article US Hottest Spots of Warming: Northeast, Southwest (Published June 5, 2014)
Source: Associated Press
Climate Change Topics: Temperature /
(Posted June 5, 2014)

 

Linkages Between Arctic Warming and Mid-Latitude Weather Patterns: Summary of a Workshop

Report Linkages Between Arctic Warming and Mid-Latitude Weather Patterns: Summary of a Workshop - "A diverse array of experts examined linkages between a warming Arctic and mid-latitude weather patterns. The workshop included presentations from leading researchers representing a range of views on this topic. The workshop was organized to allow participants to take a global perspective and consider the influence of the Arctic in the context of forcing from other components of the climate system, such as changes in the tropics, ocean circulation, and mid-latitude sea surface temperature. This report discusses our current understanding of the mechanisms that link declines in Arctic sea ice cover, loss of high-latitude snow cover, changes in Arctic-region energy fluxes, atmospheric circulation patterns, and the occurrence of extreme weather events; possible implications of more severe loss of summer Arctic sea ice upon weather patterns at lower latitudes; major gaps in our understanding, and observational and/or modeling efforts that are needed to fill those gaps; and current opportunities and limitations for using Arctic sea ice predictions to assess the risk of temperature/precipitation anomalies and extreme weather events over northern continents." (Published June 2, 2014)
Source: National Academies
Climate Change Topics: Precipitation, Extreme Weather / Sea and Polar ice / Temperature / Water supply, changes in supply, snowpack /
(Posted June 4, 2014)

 

Combined Effects of Reservoir Operations and Climate Warming on the Flow Regime of Hydropower Bypass Reaches of California's Sierra Nevada

Report Combined Effects of Reservoir Operations and Climate Warming on the Flow Regime of Hydropower Bypass Reaches of California's Sierra Nevada - "Alterations to flow regimes from regulation and climatic change both affect the biophysical functioning of rivers over long time periods and large spatial areas. Historically, however, the effects of these flow alteration drivers have been studied separately. In this study, results from unregulated and regulated river management models were assessed to understand how flow regime alterations from river regulation differ under future climate conditions in the Sierra Nevada of California, USA. Four representative flow alteration metrics -- mean annual flow, low flow duration, centroid timing and mean weekly rate of decrease -- were calculated and statistically characterized under historical and future unregulated and regulated conditions over a 20-year period at each of the eight regulated river locations below dams across the Sierra Nevada. Future climatic conditions were represented by assuming an increase in air temperature of 6 degrees C above historical (1981-2000) air temperatures, with no change in other meteorological conditions. Results indicate that climate warming will measurably alter some aspects of the flow regime. By comparison, however, river regulation with business-as-usual operations will alter flow regimes much more than climate warming. Existing reservoirs can possibly be used to dampen the anticipated effects of climate warming through improved operations, though additional research is needed to identify the full suite of such possibilities." (Rheinheimer, D. E. and J. H. Viers, 2014, River Research and Applications) (Published March 24, 2014)
Source: University of California, Davis
Climate Change Topics: California: Statewide / Streamflow /
(Posted June 4, 2014)

 

Good possibility of El Niño, but no guarantees for rain

News article Good possibility of El Niño, but no guarantees for rain (Published June 3, 2014)
Source: KCBX radio
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted June 3, 2014)

 

Historic EPA global warming rules: How will they affect California?

News article Historic EPA global warming rules: How will they affect California? (Published June 3, 2014)
Source: San Jose Mercury News
Climate Change Topics: California: Statewide / Greenhouse gas (GHG) reduction, mitigation /
(Posted June 3, 2014)

 

Disappearing Arctic sea ice reduces available water in the American west

Report Disappearing Arctic sea ice reduces available water in the American west - "Recent decreases in Arctic sea ice cover and the probability of continued decreases have raised the question of how reduced Arctic sea ice cover will influence extrapolar climate. Using a fully coupled earth system model, we generate one possible future Arctic sea ice distribution. We use this “future” sea ice distribution and the corresponding sea surface temperatures (SSTs) to run a fixed SST and ice concentration experiment with the goal of determining direct climate responses to the reduction in Arctic sea ice that is projected to occur in the next 50 years. Our results indicate that future reductions in Arctic sea ice cover could significantly reduce available water in the American west and highlight the fact that the most severe impacts of future climate change will likely be at a regional scale." (Sewall, J. O. and L. C. Sloan, 2004, Geophysical Research Letters) (Published March 24, 2004)
Source: University of California, Santa Cruz
Climate Change Topics: Sea and Polar ice / Water supply, changes in supply, snowpack /
(Posted June 3, 2014)

 

Counting Each Drop: Corporate Concern Mounts About Water Supplies

News article Counting Each Drop: Corporate Concern Mounts About Water Supplies (Published June 2, 2014)
Source: New York Times
Climate Change Topics: Water-Supply Related Risks: Insurance Industry Responses /
(Posted June 2, 2014)

 

EPA proposes rule to cut carbon emissions

News article EPA proposes rule to cut carbon emissions (Published June 2, 2014)
Source: American Water Works Association
Climate Change Topics: Greenhouse gas (GHG) reduction, mitigation /
(Posted June 2, 2014)

 

EPA unveils far-reaching climate plan targeting power plants

News article EPA unveils far-reaching climate plan targeting power plants (Published June 2, 2014)
Source: Los Angeles Times
Climate Change Topics: Greenhouse gas (GHG) reduction, mitigation /
(Posted June 2, 2014)

 

EPA Proposes First Guidelines to Cut Carbon Pollution from Existing Power Plants; Clean Power Plan is flexible proposal to ensure a healthier environment, spur innovation and strengthen the economy

News article EPA Proposes First Guidelines to Cut Carbon Pollution from Existing Power Plants; Clean Power Plan is flexible proposal to ensure a healthier environment, spur innovation and strengthen the economy (Published June 2, 2014)
Source: U.S. Environmental Protection Agency
Climate Change Topics: Greenhouse gas (GHG) reduction, mitigation /
(Posted June 2, 2014)

 

How did Australian drylands cause record land carbon sink in 2011?

News article How did Australian drylands cause record land carbon sink in 2011? (Published May 27, 2014)
Source: Environmental Research Web
Climate Change Topics: Greenhouse gas (GHG) reduction, mitigation /
(Posted May 30, 2014)

 

Sunnyvale City Council adopts 222-page Climate Action Plan

News article Sunnyvale City Council adopts 222-page Climate Action Plan
Related Link: http://horizon2035.insunnyvale.com/
(Published May 29, 2014)
Source: Sunnyvale Sun
Climate Change Topics: California: Bay Area and Delta / Sample Climate Action Plans /
(Posted May 29, 2014)

 

MWD's Response to State's Drought and Challenges of Climate Change Adaptation

News article MWD's Response to State's Drought and Challenges of Climate Change Adaptation (Published May 28, 2014)
Source: Planning Report
Climate Change Topics: AB 32 / California: Statewide / Water supply, changes in supply, snowpack /
(Posted May 29, 2014)

 

Buying Insurance Against Climate Change (Opinion)

News article Buying Insurance Against Climate Change (Opinion) (Published May 25, 2014)
Source: New York Times
Climate Change Topics: Sea-Level and Flood Risks: FEMA or Insurance Industry Responses /
(Posted May 27, 2014)

 

Climate Change Accelerates Hybridization between Native and Invasive Species of Trout

News article Climate Change Accelerates Hybridization between Native and Invasive Species of Trout (Published May 25, 2014)
Source: U.S. Geological Survey
Climate Change Topics: Ecosystems, Habitat, Threatened Species /
(Posted May 27, 2014)

 

Green Works for Climate Resilience: A Community Guide to Climate Planning

Report Green Works for Climate Resilience: A Community Guide to Climate Planning - "Green Works for Climate Resilience outlines the nature-based approaches that communities can use to prepare for and respond to the following climate impacts: Coastal Impacts: Sea Level Rise, Coastal Flooding, and Erosion; Drought and Increasing Aridity; Extreme Heat/Urban Heat Island Effect; Inland Urban Flooding and Stormwater Management; Inland Wetland and Waterway Management; Landscape and Habitat Change." "Nature-based approaches rely on enhancing, protecting, and restoring natural infrastructure, such as coastal wetlands, parks, and tree canopies, as well as features that mimic natural processes, such as rain gardens or green roofs that are used in low-impact development (LID)." (National Wildlife Federation) (Published April 17, 2014)
Climate Change Topics: Adaptation / Drought / Ecosystem Services and Climate Change / Flooding / Sea level rise / Temperature /
(Posted May 27, 2014)

 

Different types of El Nino have different effects on global temperature: May explain slowdowns in global warming

News article Different types of El Nino have different effects on global temperature: May explain slowdowns in global warming (Published May 19, 2014)
Source: Science Daily
Climate Change Topics: Precipitation, Extreme Weather / Temperature /
(Posted May 22, 2014)

 

Rising sea levels demand Bay Area balance profit and the future of the waterfront

News article Rising sea levels demand Bay Area balance profit and the future of the waterfront (Published May 21, 2014)
Source: Oakland Tribune
Climate Change Topics: California: Bay Area and Delta / Sea level rise /
(Posted May 21, 2014)

 

Climate warming mediates negative impacts of rapid pond drying for three amphibian species

Report Climate warming mediates negative impacts of rapid pond drying for three amphibian species - "Anthropogenic climate change will present both opportunities and challenges for pool-breeding amphibians. Increased water temperature and accelerated drying may directly affect larval growth, development, and survival, yet the combined effects of these processes on larvae with future climate change remain poorly understood. Increased surface temperatures are projected to warm water and decrease water inputs, leading to earlier and faster wetland drying. So it is often assumed that larvae will experience negative synergistic impacts with combined warming and drying. However, an alternative hypothesis is that warming-induced increases in metabolic rate and aquatic resource availability might compensate for faster drying rates, generating antagonistic larval responses. … Warming and drying acted additively on time to and size at metamorphosis. These nonsynergistic impacts may result from cotolerance of larvae to warming and drying, as well as warming helping to offset negative impacts of drying. Our results indicate that combined pool warming and drying may not always be harmful for larval amphibians. However, they also demonstrate that antagonistic responses are difficult to predict, which poses a challenge to proactive conservation and management. Our study highlights the importance of considering the nature of multiple stressor interactions as amphibians are exposed to an increasing number of anthropogenic threats." (O'Regan, S. M., et al., 2014, Ecology) (Published April 10, 2014)
Climate Change Topics: Ecosystems, Habitat, Threatened Species /
(Posted May 21, 2014)

 

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