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Climate Change Blog

 

NOAA establishes 'tipping points' for sea level rise

News article NOAA establishes 'tipping points' for sea level rise
Related Link: http://onlinelibrary.wiley.com/enhanced/doi/10.1002/2014EF000272/
(Published December 18, 2014)
Source: U.S. National Oceanic and Atmospheric Administration
Climate Change Topics: Flooding / Sea level rise /
(Posted December 19, 2014)

 

Reclamation Seeks Comments on Proposed Climate Change Adaptation Policy

News article Reclamation Seeks Comments on Proposed Climate Change Adaptation Policy (Published December 17, 2014)
Source: U.S. Bureau of Reclamation
Climate Change Topics: Adaptation /
(Posted December 19, 2014)

 

Flood, drought risks must be managed, with or without climate change (Opinion)

News article Flood, drought risks must be managed, with or without climate change (Opinion) (Published December 19, 2014)
Source: Los Angeles Times
Climate Change Topics: Drought / Flooding /
(Posted December 19, 2014)

 

'Tipping points' for sea level rise related flooding determined

News article 'Tipping points' for sea level rise related flooding determined (Published December 18, 2014)
Source: Science Daily
Climate Change Topics: Flooding / Sea level rise /
(Posted December 19, 2014)

 

Regional Monitoring Networks to Detect Climate Change Effects in Stream Ecosystems (External Review Draft)

Report Regional Monitoring Networks to Detect Climate Change Effects in Stream Ecosystems (External Review Draft) - "The United States Environmental Protection Agency (U.S. EPA) is working with its regional offices, states, tribes, and other entities to establish Regional Monitoring Networks (RMNs) at which biological, thermal, and hydrologic data will be collected from freshwater wadeable streams to quantify and monitor changes in baseline condition, including climate change effects. RMNs have been established in the Northeast, Mid-Atlantic, and Southeast, and efforts are expanding into other regions. The need for RMNs stems from the lack of long-term, contemporaneous biological, thermal, and hydrologic data, particularly at minimally disturbed sites. Data collected at RMNs will be used to: detect temporal trends; investigate relationships between biological, thermal, and hydrologic data; explore ecosystem responses and recovery from extreme weather events; test hypotheses and predictive models related to climate change; and quantify natural variability. RMN surveys build on existing bioassessment efforts, with the goal of collecting comparable data that can be pooled efficiently at a regional level. This document describes the development of the current RMNs for riffle-dominated, freshwater wadeable streams." (Published November 28, 2014)
Source: United States. Environmental Protection Agency
Climate Change Topics: Ecosystems, Habitat, Threatened Species /
(Posted December 19, 2014)

 

From the extreme to the mean: Acceleration and tipping points of coastal inundation from sea level rise

Report From the extreme to the mean: Acceleration and tipping points of coastal inundation from sea level rise - "Relative sea level rise (RSLR) has driven large increases in annual water level exceedances (duration and frequency) above minor (nuisance level) coastal flooding elevation thresholds established by the National Weather Service (NWS) at U.S. tide gauges over the last half-century. . . . Along the U.S. West Coast, annual exceedance rates are linearly increasing, complicated by sharp punctuations in RSLR anomalies during El Nino Southern Oscillation (ENSO) phases, and we account for annual exceedance variability along the U.S. West and East Coasts from ENSO forcing. Projections of annual exceedances above local NWS nuisance levels at U.S. tide gauges are estimated by shifting probability estimates of daily maximum water levels over a contemporary 5-year period following probabilistic RSLR projections of Kopp et al. (2014) for representative concentration pathways (RCP) 2.6, 4.5, and 8.5. We suggest a tipping point for coastal inundation (30?days/per year with a threshold exceedance) based on the evolution of exceedance probabilities. Under forcing associated with the local-median projections of RSLR, the majority of locations surpass the tipping point over the next several decades regardless of specific RCP." (Sweet, W. V. and J. Park, 2014, Earth's Future) (Published December 18, 2014)
Source: United States. National Oceanic and Atmospheric Administration
Climate Change Topics: Flooding / Sea level rise /
(Posted December 19, 2014)

 

Twenty-First-Century Precipitation Changes over the Los Angeles Region

Report Twenty-First-Century Precipitation Changes over the Los Angeles Region - "A new hybrid statistical-dynamical downscaling technique is described to project mid- and end-of-21st century local precipitation changes associated with 36 global climate models (GCMs) in phase 5 of the Coupled Model Intercomparison Project archive over the greater Los Angeles region. Land-averaged precipitation changes, ensemble-mean changes, and the spread of those changes for both time slices are presented. It is demonstrated that the results are similar to what would be produced if expensive dynamical downscaling techniques were instead applied to all GCMs. Changes in land-averaged ensemble-mean precipitation are near zero for both time slices, reflecting the region's typical position in the models at the node of oppositely-signed large-scale precipitation changes. For both time slices, the inter-model spread of changes is only about 0.2-0.4 times as large as natural interannual variability in the baseline period. A caveat to these conclusions is that interannual variability in the tropical Pacific is generally regarded as a weakness of the GCMs. As a result, there is some chance the GCM responses in the tropical Pacific to a changing climate and associated impacts on Southern California precipitation are not credible. It is subjectively judged that this GCM weakness increases the uncertainty of regional precipitation change, perhaps by as much as 25%. Thus it cannot be excluded that the possibility that significant regional adaptation challenges related to either a precipitation increase or decrease would arise. However, the most likely downscaled outcome is a small change in local mean precipitation compared to natural variability, with large uncertainty on the sign of the change." (Berg, N., et al., 2014, Journal of Climate) (Published December 11, 2014)
Source: University of California, Los Angeles
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted December 19, 2014)

 

Sea Level Rise and Nuisance Flood Frequency Changes around the United States

Report Sea Level Rise and Nuisance Flood Frequency Changes around the United States - "In this report, we show that water level exceedances above the elevation threshold for 'minor' coastal flooding (nuisance level) impacts established locally by the National Weather Service (NWS) have been increasing in time. More importantly, we document that event frequencies are accelerating at many U.S. East and Gulf Coast gauges, and many other locations will soon follow regardless of whether there is an acceleration of SLRrel. Lastly, we show a regional pattern of increasingly greater event-rate acceleration as the height between MSL and a location’s nuisance flood threshold elevation decreases" (June 2014) (Published June 30, 2014)
Source: United States. National Oceanic and Atmospheric Administration
Climate Change Topics: Flooding / Sea level rise /
(Posted December 19, 2014)

 

Secretary Jewell Announces New Wildlife and Climate Studies at the Southwest Climate Science Center

News article Secretary Jewell Announces New Wildlife and Climate Studies at the Southwest Climate Science Center (Published December 18, 2014)
Source: U.S. Geological Survey
Climate Change Topics: Drought / Ecosystems, Habitat, Threatened Species / Precipitation, Extreme Weather / Sea level rise / Water supply, changes in supply, snowpack /
(Posted December 18, 2014)

 

Unleashing Climate Data and Innovation for more Resilient Ecosystems

News article Unleashing Climate Data and Innovation for more Resilient Ecosystems
Related Link: http://www.climate.data.gov/
(Published December 9, 2014)
Source: White House
Climate Change Topics: Ecosystems, Habitat, Threatened Species /
(Posted December 15, 2014)

 

Climate change won't dry up Southern California, study finds

News article Climate change won't dry up Southern California, study finds
Related Link: http://journals.ametsoc.org/doi/abs/10.1175/JCLI-D-14-00316.1
(Published December 11, 2014)
Source: Los Angeles Times
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted December 11, 2014)

 

Water Governance and Climate Change: Drought in California as a Lens on Our Climate Future

News article Water Governance and Climate Change: Drought in California as a Lens on Our Climate Future
Related Link: http://waterinthewest.stanford.edu/sites/default/files/Water%20Governance%20and%20Climate%20Change_final2.pdf
(Published December 9, 2014)
Source: Water in the West (Stanford University)
Climate Change Topics: California: Statewide / Drought / Water supply, changes in supply, snowpack /
(Posted December 10, 2014)

 

Wetlands more vulnerable to invasives as climate changes

News article Wetlands more vulnerable to invasives as climate changes (Published December 10, 2014)
Source: Science Daily
Climate Change Topics: Ecosystems, Habitat, Threatened Species /
(Posted December 10, 2014)

 

Water Governance and Climate Change: Drought in California as a Lens on Our Climate Future

Report Water Governance and Climate Change: Drought in California as a Lens on Our Climate Future - Water officials from California and Australia discussed what's known about drought and climate change and how to prepare for the future. (Published December 9, 2014)
Source: Stanford University
Climate Change Topics: California: Statewide / Drought /
(Posted December 10, 2014)

 

Atmosphere and Ocean Origins of North American Droughts

Report Atmosphere and Ocean Origins of North American Droughts - "During the early twenty-first century, natural decadal swings in tropical Pacific and North Atlantic SSTs have contributed to a dry regime for the United States. Long-term changes caused by increasing trace gas concentrations are now contributing to a modest signal of soil moisture depletion, mainly over the U.S. Southwest, thereby prolonging the duration and severity of naturally occurring droughts." (Seager, R. and M. Hoerling, 2014, Journal of Climate) (Published March 3, 2014)
Climate Change Topics: Drought /
(Posted December 10, 2014)

 

Probable causes of the abnormal ridge accompanying the 2013-2014 California drought: ENSO precursor and anthropogenic warming footprint

Report Probable causes of the abnormal ridge accompanying the 2013-2014 California drought: ENSO precursor and anthropogenic warming footprint - "The dipole and associated circulation pattern is not linked directly with either El Niño-Southern Oscillation (ENSO) or Pacific Decadal Oscillation; instead, it is correlated with a type of ENSO precursor. The connection between the dipole and ENSO precursor has become stronger since the 1970s, and this is attributed to increased greenhouse gas loading as simulated by the CESM. Therefore, there is a traceable anthropogenic warming footprint in the enormous intensity of the anomalous ridge during winter 2013-2014 and the associated drought." (Wang, S.-Y., et al., 2014, Geophysical Research Letters) Open access article. (Published June 2, 2014)
Climate Change Topics: California: Statewide / Drought /
(Posted December 10, 2014)

 

Global Warming and Changes in Risk of Concurrent Climate Extremes: Insights from the 2014 California Drought

Report Global Warming and Changes in Risk of Concurrent Climate Extremes: Insights from the 2014 California Drought - "Global warming and the associated rise in extreme temperatures substantially increase the chance of concurrent droughts and heatwaves. The 2014 California drought is an archetype of an event characterized by not only low precipitation but also extreme high temperatures. From the raging wildfires, to record low storage levels and snowpack conditions, the impacts of this event can be felt throughout California. Wintertime water shortages worry decision-makers the most because it is the season to build up water supplies for the rest of the year. Here we show that the traditional univariate risk assessment methods based on precipitation condition may substantially underestimate the risk of extreme events such as the 2014 California drought because of ignoring the effects of temperature. We argue that a multivariate viewpoint is necessary for assessing risk of extreme events, especially in a warming climate. This study discusses a methodology for assessing the risk of concurrent extremes such as droughts and extreme temperatures." (AghaKouchak, A. L., et al., 2014, Geophysical Research Letters) (Published December 4, 2014)
Climate Change Topics: California: Statewide / Drought / Temperature / Water supply, changes in supply, snowpack / Wildfires /
(Posted December 10, 2014)

 

Feds: Don't blame California drought on warming

News article Feds: Don't blame California drought on warming (Published December 9, 2014)
Source: Associated Press
Climate Change Topics: California: Statewide / Drought /
(Posted December 9, 2014)

 

California drought: Natural patterns, not human-caused climate change, federal study finds

News article California drought: Natural patterns, not human-caused climate change, federal study finds
Related Link: http://cpo.noaa.gov/MAPP/californiadroughtreport
(Published December 9, 2014)
Source: San Jose Mercury News
Climate Change Topics: California: Statewide / Drought /
(Posted December 9, 2014)

 

California Drought Is Said to Have Natural Cause

News article California Drought Is Said to Have Natural Cause (Published December 9, 2014)
Source: New York Times
Climate Change Topics: California: Statewide / Drought /
(Posted December 9, 2014)

 

New insights into predicting future droughts in California: Natural cycles, sea surface temperatures found to be main drivers in ongoing event

News article New insights into predicting future droughts in California: Natural cycles, sea surface temperatures found to be main drivers in ongoing event (Published December 8, 2014)
Source: Science Daily
Climate Change Topics: California: Statewide / Drought /
(Posted December 9, 2014)

 

New Study Links Ocean Temperatures to California Drought

News article New Study Links Ocean Temperatures to California Drought (Published December 8, 2014)
Source: Association of California Water Agencies
Climate Change Topics: California: Statewide / Drought /
(Posted December 9, 2014)

 

The Growing Influence of Climate Change on the California Drought (Column, Peter Gleick)

News article The Growing Influence of Climate Change on the California Drought (Column, Peter Gleick) (Published December 8, 2014)
Source: National Geographic
Climate Change Topics: California: Statewide / Drought /
(Posted December 9, 2014)

 

California's Drought: Is it Global Warming?

News article California's Drought: Is it Global Warming? (Published December 8, 2014)
Source: KQED Radio
Climate Change Topics: California: Statewide / Drought /
(Posted December 9, 2014)

 

Causes and Predictability of the 2011-2014 California Drought: Assessment Report

Report Causes and Predictability of the 2011-2014 California Drought: Assessment Report - "The severe drought in California over the last 3 years (2011-14) is primarily due to natural climate variability, key features of which appear to be predictable from knowledge of how California precipitation reacts to tropical ocean temperatures. There has been no long-term trend in California precipitation; however, California temperatures have been rising and record high temperatures during the drought were likely made more extreme due to human-induced climate change. . . . The 2011-14 California drought was primarily caused by natural climate variability. A prolonged, enhanced high-pressure ridge off the West Coast prevailed during the last three winters, which is typical of the state’s historical droughts. West Coast high pressure was rendered more likely during 2011-14 by effects of sea surface temperature patterns over the world oceans. The drought’s first year (2011/12) was likely the most predictable, when La Niña effects largely explained high pressure off the West Coast. Climate model simulations indicate that high pressure continued to be favored due to ocean effects in the second and third years (2012/13 and 2013/14)." (Published December 8, 2014)
Source: United States. National Oceanic and Atmospheric Administration
Climate Change Topics: California: Statewide / Drought /
(Posted December 9, 2014)

 

Rising Tides at Our Doorstep

Report Rising Tides at Our Doorstep - The San Francisco Civil Grand Jury investigated "How and where will rising sea levels most likely affect the City of San Francisco and what is the City doing to address the issue." Response from the City (Published July 8, 2014)
Climate Change Topics: Adaptation / California: Bay Area and Delta / Flooding / Land Use, environmental management systems, and regulation / Sea level rise /
(Posted December 9, 2014)

 

Major deltas 'could be drowned'

News article Major deltas 'could be drowned' (Published December 3, 2014)
Source: BBC
Climate Change Topics: Sea level rise /
(Posted December 4, 2014)

 

Climate Change and California's Water: What Challenges Can We Anticipate?

Report Climate Change and California's Water: What Challenges Can We Anticipate? - "Dr. Dan Cayan is the director of the Climate Change Center at Scripps and also concurrently holds a research position in the USGS Water Resources division. At the November meeting of the Delta Stewardship Council, he gave an overview of California's climate variability and of the current state of knowledge of the potential impacts of climate change on the state’s water resources." Links to slides and video. (Published November 20, 2014)
Climate Change Topics: Drought / Water supply, changes in supply, snowpack /
(Posted December 4, 2014)

 

How unusual is the 2012-2014 California drought?

Report How unusual is the 2012-2014 California drought? - "For the past three years (2012-2014), California has experienced the most severe drought conditions in its last century. But how unusual is this event? Here we use two paleoclimate reconstructions of drought and precipitation for Central and Southern California to place this current event in the context of the last millennium. We demonstrate that while 3-year periods of persistent below-average soil moisture are not uncommon, the current event is the most severe drought in the last 1200 years, with single year (2014) and accumulated moisture deficits worse than any previous continuous span of dry years. Tree-ring chronologies extended through the 2014 growing season reveal that precipitation during the drought has been anomalously low but not outside the range of natural variability. The current California drought is exceptionally severe in the context of at least the last millennium and is driven by reduced though not unprecedented precipitation and record high temperatures." (Griffin, D. and K. J. Anchukaitis, 2014) (Published December 3, 2014)
Climate Change Topics: California: Statewide / Drought /
(Posted December 3, 2014)

 

Department of Defense 2014 Climate Change Adaptation Roadmap

Report Department of Defense 2014 Climate Change Adaptation Roadmap - "The Department has established three broad adaptation goals: Goal 1: Identify and assess the effects of climate change on the Department. Goal 2: Integrate climate change considerations across the Department and manage associated risks. Goal 3: Collaborate with internal and external stakeholders on climate change challenges." (Published October 10, 2014)
Climate Change Topics: Adaptation / Temperature / Precipitation, Extreme Weather / Sea level rise /
(Posted December 2, 2014)

 

In metro Houston, an uphill fight to build a Texas-size defense against the next big storm

News article In metro Houston, an uphill fight to build a Texas-size defense against the next big storm (Published November 24, 2014)
Source: Reuters
Climate Change Topics: Flooding / Sea level rise /
(Posted December 1, 2014)

 

Water supply ebbs, flows with climate

News article Water supply ebbs, flows with climate (Published November 29, 2014)
Source: San Diego Union Tribune
Climate Change Topics: California: Statewide / Drought / Water supply, changes in supply, snowpack /
(Posted December 1, 2014)

 

Benefits of greenhouse gas mitigation on the supply, management, and use of water resources in the United States

Report Benefits of greenhouse gas mitigation on the supply, management, and use of water resources in the United States - "This paper estimates impacts and damages from five water resource-related models addressing runoff, drought risk, economics of water supply/demand, water stress, and flooding damages. The models differ in the water system assessed, spatial scale, and unit of assessment, but together provide a quantitative and descriptive richness in characterizing water sector effects that no single model can capture. The results, driven by a consistent set of greenhouse gas (GHG) emission and climate scenarios, examine uncertainty from emissions, climate sensitivity, and climate model selection. While calculating the net impact of climate change on the water sector as a whole may be impractical, broad conclusions can be drawn regarding patterns of change and benefits of GHG mitigation. Four key findings emerge: 1) GHG mitigation substantially reduces hydro-climatic impacts on the water sector; 2) GHG mitigation provides substantial national economic benefits in water resources related sectors; 3) the models show a strong signal of wetting for the Eastern US and a strong signal of drying in the Southwest; and 4) unmanaged hydrologic systems impacts show strong correlation with the change in magnitude and direction of precipitation and temperature from climate models, but managed water resource systems and regional economic systems show lower correlation with changes in climate variables due to non-linearities created by water infrastructure and the socio-economic changes in non-climate driven water demand." (Strzepek, K., et al., 2014, Climatic Change) Open access paper. (Published November 29, 2014)
Climate Change Topics: Drought / Water supply, changes in supply, snowpack /
(Posted December 1, 2014)

 

Neither rain nor snow nor heat sways views on climate science

News article Neither rain nor snow nor heat sways views on climate science (Published November 25, 2014)
Source: Los Angeles Times
Climate Change Topics: Politics, laws, United Nations, etc. /
(Posted November 25, 2014)

 

U.S. EPA Helps Redwood Valley County Water District Prepare for Climate Change

News article U.S. EPA Helps Redwood Valley County Water District Prepare for Climate Change (Published November 21, 2014)
Source: Association of California Water Agencies
Climate Change Topics: Adaptation / California: Water/Flood Protection Districts /
(Posted November 24, 2014)

 

Scenario-Based Projected Changes Map

Report Scenario-Based Projected Changes Map - Zoom in on an area to get projected changes in annual total precipitation, annual average temperature, precipitation intensity for the 100-year storm, and sea-level rise under three different scenarios (hotter-drier, warmer-wetter, and middle-distribution) for 2035 and 2060. (Published )
Source: United States. Environmental Protection Agency
Climate Change Topics: Models and Tools / Precipitation, Extreme Weather / Sea level rise / Temperature /
(Posted November 24, 2014)

 

President's State, Local, and Tribal Leaders Task Force on Climate Preparedness and Resilience: Recommendations to the President

Report President's State, Local, and Tribal Leaders Task Force on Climate Preparedness and Resilience: Recommendations to the President - "The recommendations offer guidance on how the Federal Government should modernize programs and policies to incorporate climate change, incentivize and remove barriers to community resilience, and provide useful, actionable information and tools. The Task Force organized its report across seven cross-cutting themes: building resilient communities; improving resilience in the Nation's infrastructure; ensuring resilience of natural resources; preserving human health and supporting resilient populations; supporting climate-smart hazard mitigation and disaster preparedness and recovery; understanding and acting on the economics of resilience; and building capacity." (Nov. 2014) (Published November 17, 2014)
Source: United States. White House Council on Environmental Quality
Climate Change Topics: Adaptation / Ecosystems, Habitat, Threatened Species / Energy management and conservation / Greenhouse gas (GHG) reduction, mitigation / Sea level rise / Water quality / Water supply, changes in supply, snowpack /
(Posted November 24, 2014)

 

FetchClimate

Report FetchClimate - "FetchClimate provides ready access to complex geographical information including, but not limited to, climatological information. On accessing the FetchClimate Azure web service, you simply need to perform four steps to find what you are looking for: 1.Draw the location on the Earth via points or grids (Where?) 2.Specify the data of interest (What?) 3.Set the timeframe, including future predictions, and a combination of averages over -- or steps through -- years, days, and hours (When?) 4.Fetch and view your results." (Microsoft Research) Requires IE 10 or higher, Chrome, or Firefox. (Published )
Climate Change Topics: Models and Tools / Precipitation, Extreme Weather / Sea level rise / Temperature / Water supply, changes in supply, snowpack /
(Posted November 24, 2014)

 

2014 warmest year: California, world set to break records

News article 2014 warmest year: California, world set to break records (Published November 22, 2014)
Source: Los Angeles Times
Climate Change Topics: California: Statewide / Temperature /
(Posted November 21, 2014)

 

Utilities using EPA climate-risk asessment tool

News article Utilities using EPA climate-risk asessment tool (Published November 20, 2014)
Source: American Water Works Association
Climate Change Topics: Water utilities guidance /
(Posted November 21, 2014)

 

Salinity counts when it comes to sea level

News article Salinity counts when it comes to sea level (Published November 20, 2014)
Source: Science Daily
Climate Change Topics: Sea level rise /
(Posted November 21, 2014)

 

Climate Ready Water Utilities (CRWU)

Report Climate Ready Water Utilities (CRWU) - Many tools, reports, and training opportunities. "EPA's Climate Ready Water Utilities (CRWU) initiative assists the water sector, which includes drinking water, wastewater, and stormwater utilities, in addressing climate change impacts. Through the development of practical and easy-to-use tools, EPA promotes a clear understanding of climate science and adaptation options by translating complex climate projections into accessible formats. This information helps utility owners and operators better prepare their systems for the impacts of climate change. Extreme weather events, sea level rise, shifting precipitation patterns and temperature variability, all intensified by climate change, have significant implications for the sustainability of the water sector. By planning for, assessing and adapting to these challenges, the water sector can fulfill their public health and environmental missions and begin the process of becoming climate ready." (Published )
Source: United States. Environmental Protection Agency
Climate Change Topics: Precipitation, Extreme Weather / Sea level rise / Water supply, changes in supply, snowpack / Water utilities guidance /
(Posted November 21, 2014)

 

DWR announces climate science service

News article DWR announces climate science service (Published November 20, 2014)
Source: California Dept. of Water Resources
Climate Change Topics: Adaptation / California: Statewide / Water supply, changes in supply, snowpack /
(Posted November 20, 2014)

 

A Toolkit to Help Communities Respond to a Changing Climate

News article A Toolkit to Help Communities Respond to a Changing Climate
Related Link: http://toolkit.climate.gov/
(Published November 17, 2014)
Source: White House
Climate Change Topics: Flooding / Models and Tools / Sea level rise / Ecosystems, Habitat, Threatened Species /
(Posted November 18, 2014)

 

Modeling Sea-Level Rise in San Francisco Bay Estuary

Report Modeling Sea-Level Rise in San Francisco Bay Estuary - "It is the aim of our program to provide site specific sea-level rise predictions to land managers through the intensive collection of field data and innovative predictive modeling. In 2009 and 2010, thousands of elevation and vegetation survey points were collected in salt marsh at 12 sites surrounding San Francisco Bay. The elevation data was synthesized into a continuous elevation model for each site, providing land owners valuable baseline data. A new marsh accretion model, WARMER, (Swanson et al., submitted) was developed to assess the risk of sea-level rise to salt marsh parcels around San Francisco Bay. Additional sediment data was collected at four representative sites to provide inputs for the WARMER model. The results of WARMER were then extrapolated to the remaining study sites. WARMER indicates that most salt marsh around San Francisco Bay will transition from high to mid marsh by 2040, to low marsh by 2060 and to mudflat by 2080, however there is a great deal of variation around the bay. The rate of sea-level rise and local accretion rates may be very different than the parameters used for the model, thus WARMER results are best characterized as one possible scenario of how the salt marsh platform may respond to rising sea-levels." The project produced: "Final Report for Sea-Level Rise Response Modeling for San Francisco Bay Estuary Tidal Marshes" (2013) (Published April 17, 2013)
Source: United States. Geological Survey
Climate Change Topics: California: Bay Area and Delta / Ecosystems, Habitat, Threatened Species / Models and Tools / Sea level rise /
(Posted November 18, 2014)

 

U.S. Climate Resilience Toolkit

Report U.S. Climate Resilience Toolkit - Aggregates in one place tools, data, and maps from federal government agencies. Topics covered include coastal flood risk, ecosystem vulnerability, food resilience, and human health. (Published November 17, 2014)
Source: United States. National Oceanic and Atmospheric Administration
Climate Change Topics: Ecosystems, Habitat, Threatened Species / Flooding / Models and Tools / Sea level rise /
(Posted November 18, 2014)

 

Dynamic Reservoir Operations: Managing for Climate Variability and Change

Report Dynamic Reservoir Operations: Managing for Climate Variability and Change - "Increasing demand for water and potential shifts in availability of water due to climate change present challenges to water system operators, who are responsible for maintaining water supply reliability, both in terms of quantity and quality. One promising approach for addressing these challenges is through application of systems operations approaches to improve reservoir operations. Dynamic Reservoir Operations (DRO) are operating rules that change based on the present state of a system, such as storage levels, current inflow, and/or forecasted conditions. Dynamic operations tend to be effective because they depend on a diverse group of variables that result in a more robust operational framework, providing utilities more information for operating their system to meet objectives under varying conditions." (Published October 21, 2014)
Source: Water Research Foundation
Climate Change Topics: Water supply, changes in supply, snowpack / Water utilities guidance /
(Posted November 18, 2014)

 

The Hydrologic Fast Lane (Also: IPCC Reports 101)

News article The Hydrologic Fast Lane (Also: IPCC Reports 101) (Published November 13, 2014)
Source: Circle of Blue
Climate Change Topics: Groundwater / Precipitation, Extreme Weather / Water quality / Water supply, changes in supply, snowpack /
(Posted November 13, 2014)

 

Groundwater warming up in sync

News article Groundwater warming up in sync (Published November 11, 2014)
Source: Science Daily
Climate Change Topics: Groundwater /
(Posted November 12, 2014)

 

Report: International Panel on Climate Change Reiterates Three Urgent Water Concerns

News article Report: International Panel on Climate Change Reiterates Three Urgent Water Concerns (Published November 7, 2014)
Source: Circle of Blue
Climate Change Topics: Precipitation, Extreme Weather / Water quality / Water supply, changes in supply, snowpack /
(Posted November 12, 2014)

 

Obama, Chinese president agree to landmark climate deal

News article Obama, Chinese president agree to landmark climate deal (Published November 12, 2014)
Source: Los Angeles Times
Climate Change Topics: Greenhouse gas (GHG) reduction, mitigation / Politics, laws, United Nations, etc. /
(Posted November 12, 2014)

 

Understanding the Effects of Climate Change

Report Understanding the Effects of Climate Change - Abstracts of papers on climate change presented at the 2014 Bay-Delta Science Conference. Topics included severe storms (Dettinger, M., et al.), coastal flood maps for the San Francisco Bay (Barnard, P., et al.), the diminishing odds of 'normal' snowpacks (Cayan, D., et al.), implications of warmer temperatures for the Delta smelt (Brown, L., et al., and Morgan-King, T. et al.) (Published October 30, 2014)
Climate Change Topics: California: Bay Area and Delta / Ecosystems, Habitat, Threatened Species / Precipitation, Extreme Weather / Water supply, changes in supply, snowpack /
(Posted November 12, 2014)

 

Will 2014 Be California's Hottest Year in History?

News article Will 2014 Be California's Hottest Year in History? (Published November 6, 2014)
Source: Weather Channel
Climate Change Topics: California: Statewide / Temperature /
(Posted November 6, 2014)

 

Unusual warm ocean conditions off California, West Coast bringing odd species

News article Unusual warm ocean conditions off California, West Coast bringing odd species (Published November 2, 2014)
Source: Contra Costa Times
Climate Change Topics: California: Statewide / Ecosystems, Habitat, Threatened Species /
(Posted November 5, 2014)

 

Snow retreat will worsen California droughts

News article Snow retreat will worsen California droughts (Published November 4, 2014)
Source: New Scientist
Climate Change Topics: California: Statewide / Drought / Water supply, changes in supply, snowpack /
(Posted November 5, 2014)

 

Study says natural factors, not humans, behind West Coast warming

News article Study says natural factors, not humans, behind West Coast warming (Published November 4, 2014)
Source: Sacramento Bee
Climate Change Topics: Research /
(Posted November 4, 2014)

 

U.N. Panel Warns of 'Severe and Irreversible' Effects of Climate Change

News article U.N. Panel Warns of 'Severe and Irreversible' Effects of Climate Change (Published November 4, 2014)
Source: KQED Radio
Climate Change Topics: Global issues, human impacts / Greenhouse gas (GHG) increases / Greenhouse gas (GHG) reduction, mitigation /
(Posted November 4, 2014)

 

The Global Groundwater Crisis

Report The Global Groundwater Crisis - "Groundwater depletion the world over poses a far greater threat to global water security than is currently acknowledged." (Famiglietti, J. S., 2014, Nature Climate Change) (Published October 29, 2014)
Climate Change Topics: Groundwater /
(Posted November 4, 2014)

 

EPA Releases Climate Plans on Fifth Anniversary of President Obamas Sustainability Initiative/Plan Builds Capacity to Protect Human Health and the Environment in a Changing Climate

News article EPA Releases Climate Plans on Fifth Anniversary of President Obamas Sustainability Initiative/Plan Builds Capacity to Protect Human Health and the Environment in a Changing Climate
Related Link: http://epa.gov/climatechange/impacts-adaptation/fed-programs/Final-EPA-Adaptation-plans.html
(Published October 31, 2014)
Source: U.S. Environmental Protection Agency
Climate Change Topics: Adaptation / Federal Regulations, EPA, Clean Air Act / Precipitation, Extreme Weather / Sea level rise / Water supply, changes in supply, snowpack /
(Posted November 3, 2014)

 

Despite California climate law, carbon emissions may be a shell game

News article Despite California climate law, carbon emissions may be a shell game (Published November 3, 2014)
Source: Sacramento Bee
Climate Change Topics: AB 32 / California: Statewide / Greenhouse gas (GHG) reduction, mitigation /
(Posted November 3, 2014)

 

Warning in climate change report is loudest yet by scientists

News article Warning in climate change report is loudest yet by scientists
Related Link: http://www.ipcc.ch/
(Published November 3, 2014)
Source: Sacramento Bee
Climate Change Topics: Global issues, human impacts / Greenhouse gas (GHG) reduction, mitigation /
(Posted November 3, 2014)

 

New research predicts California droughts will worsen

News article New research predicts California droughts will worsen (Published November 1, 2014)
Source: Sacramento Bee
Climate Change Topics: California: Statewide / Drought /
(Posted November 3, 2014)

 

Scientists sound the alarm in climate change report

News article Scientists sound the alarm in climate change report (Published November 2, 2014)
Source: Los Angeles Times
Climate Change Topics: Global issues, human impacts / Greenhouse gas (GHG) increases / Greenhouse gas (GHG) reduction, mitigation /
(Posted November 3, 2014)

 

Climate Change 2014: Synthesis Report

Report Climate Change 2014: Synthesis Report - Synthesis of the IPCC's 5th assessment. "Human influence on the climate is clear. The more we disrupt our climate, the more we risk severe, pervasive and irreversible impacts. We have the means to limit climate change and build a more prosperous, sustainable future." (Published November 2, 2014)
Source: Intergovernmental Panel on Climate Change (IPCC)
Climate Change Topics: Agriculture / Flooding / Global issues, human impacts / Greenhouse gas (GHG) increases / Greenhouse gas (GHG) reduction, mitigation / Precipitation, Extreme Weather / Sea level rise / Temperature /
(Posted November 3, 2014)

 

EPA Adaptation Implementation Plans

Report EPA Adaptation Implementation Plans - EPA's plans to adapt to climate change for different sectors (such as water) and all regions of the country. (Published October 31, 2014)
Source: United States. Environmental Protection Agency
Climate Change Topics: Adaptation / Federal Regulations, EPA, Clean Air Act / Precipitation, Extreme Weather / Sea level rise / Water quality / Water supply, changes in supply, snowpack /
(Posted November 3, 2014)

 

NASA scientist raises alarm on global groundwater decline

News article NASA scientist raises alarm on global groundwater decline (Published October 30, 2014)
Source: E&E Publishing LLC
Climate Change Topics: Groundwater /
(Posted October 30, 2014)

 

How Boston is rethinking its relationship with the sea

News article How Boston is rethinking its relationship with the sea (Published October 26, 2014)
Source: BBC
Climate Change Topics: Sea level rise /
(Posted October 27, 2014)

 

Here's How San Francisco is Bracing for Sea Level Rise Estimated to Impact $48 Billion in Assets

News article Here's How San Francisco is Bracing for Sea Level Rise Estimated to Impact $48 Billion in Assets (Published October 24, 2014)
Source: Vice News
Climate Change Topics: California: Bay Area and Delta / Sea level rise /
(Posted October 27, 2014)

 

San Francisco looks to adapt to sea-level rise, climate change impacts

News article San Francisco looks to adapt to sea-level rise, climate change impacts (Published October 26, 2014)
Source: Fierce Homeland Security
Climate Change Topics: California: Bay Area and Delta / Sea level rise /
(Posted October 27, 2014)

 

Climate change caused by ocean, not just atmosphere

News article Climate change caused by ocean, not just atmosphere (Published October 25, 2014)
Source: Science Daily
Climate Change Topics: Greenhouse gas (GHG) increases / Temperature /
(Posted October 27, 2014)

 

Mediterranean, semi-arid ecosystems prove resistant to climate change

News article Mediterranean, semi-arid ecosystems prove resistant to climate change (Published October 20, 2014)
Source: Science Daily
Climate Change Topics: Ecosystems, Habitat, Threatened Species /
(Posted October 23, 2014)

 

Stanford's own water depends on climate divestment (Opinion by Board director Brian Schmidt)

News article Stanford's own water depends on climate divestment (Opinion by Board director Brian Schmidt) (Published October 21, 2014)
Source: Stanford Daily
Climate Change Topics: Greenhouse gas (GHG) reduction, mitigation /
(Posted October 22, 2014)

 

Warming Earth heading for hottest year on record

News article Warming Earth heading for hottest year on record (Published October 21, 2014)
Source: Associated Press
Climate Change Topics: Temperature /
(Posted October 21, 2014)

 

Newly-Released Study Vastly Underestimates The 'Worst-Case Scenario' For Sea Level Rise

News article Newly-Released Study Vastly Underestimates The 'Worst-Case Scenario' For Sea Level Rise (Published October 16, 2014)
Source: Think Progress
Climate Change Topics: Sea level rise /
(Posted October 17, 2014)

 

Sea level rise over past century unmatched in 6000 years, says study

News article Sea level rise over past century unmatched in 6000 years, says study (Published October 16, 2014)
Source: Environmental Research Web
Climate Change Topics: Sea level rise /
(Posted October 17, 2014)

 

Upper limit for sea level projections by 2100

Report Upper limit for sea level projections by 2100 - "We construct the probability density function of global sea level at 2100, estimating that sea level rises larger than 180 cm are less than 5% probable. An upper limit for global sea level rise of 190 cm is assembled by summing the highest estimates of individual sea level rise components simulated by process based models with the RCP8.5 scenario. The agreement between the methods may suggest more confidence than is warranted since large uncertainties remain due to the lack of scenario-dependent projections from ice sheet dynamical models, particularly for mass loss from marine-based fast flowing outlet glaciers in Antarctica. This leads to an intrinsically hard to quantify fat tail in the probability distribution for global mean sea level rise. Thus our low probability upper limit of sea level projections cannot be considered definitive. Nevertheless, our upper limit of 180 cm for sea level rise by 2100 is based on both expert opinion and process studies and hence indicates that other lines of evidence are needed to justify a larger sea level rise this century." (Jevejeva, S., et al., 2014, Environmental Research Letters) (Published October 10, 2014)
Climate Change Topics: Sea level rise /
(Posted October 15, 2014)

 

Rising sea levels of 1.8 meters in worst-case scenario, researchers calculate

News article Rising sea levels of 1.8 meters in worst-case scenario, researchers calculate
Related Link: http://iopscience.iop.org/1748-9326/9/10/104008/
(Published October 14, 2014)
Source: Science Daily
Climate Change Topics: Sea level rise /
(Posted October 14, 2014)

 

See just how much is left of San Francisco Bay's shrinking wetlands

News article See just how much is left of San Francisco Bay's shrinking wetlands (Published October 9, 2014)
Source: PBS NewsHour
Climate Change Topics: California: Bay Area and Delta / Ecosystems, Habitat, Threatened Species / Sea level rise /
(Posted October 10, 2014)

 

Restored wetlands welcome wildlife and protect against future floods in San Francisco Bay Area

News article Restored wetlands welcome wildlife and protect against future floods in San Francisco Bay Area (Published October 9, 2014)
Source: PBS NewsHour
Climate Change Topics: California: Bay Area and Delta / Ecosystems, Habitat, Threatened Species / Sea level rise /
(Posted October 10, 2014)

 

Climate Change and Sacramento Valley Water Operations

Report Climate Change and Sacramento Valley Water Operations - Presentations "from Sacramento Valley water leaders as they discuss the effects of climate change on water storage, transfers and forecasted operations. Presenters provide valuable insights into current and desired reservoir conditions and projects." (Published September 18, 2014)
Source: Association of California Water Agencies
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack / Water utilities guidance /
(Posted October 8, 2014)

 

National Fish, Wildlife and Plants Climate Adaptation Strategy: Taking Action, a Progress Report, 2014

Report National Fish, Wildlife and Plants Climate Adaptation Strategy: Taking Action, a Progress Report, 2014 - Case studies of work done around the country. (Published September 18, 2014)
Climate Change Topics: Adaptation / Ecosystems, Habitat, Threatened Species /
(Posted October 6, 2014)

 

Scientists speed up analysis of human link to wild weather

News article Scientists speed up analysis of human link to wild weather (Published October 2, 2014)
Source: Reuters
Climate Change Topics: Drought / Flooding / Precipitation, Extreme Weather /
(Posted October 2, 2014)

 

When Can A Big Storm Or Drought Be Blamed On Climate Change?

News article When Can A Big Storm Or Drought Be Blamed On Climate Change? (Published October 1, 2014)
Source: National Public Radio (NPR)
Climate Change Topics: Drought / Precipitation, Extreme Weather /
(Posted October 2, 2014)

 

Water politics must adapt to a warming world

News article Water politics must adapt to a warming world (Published September 30, 2014)
Source: Nature
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted September 30, 2014)

 

Climate change is increasing the chances of drought (Opinion)

News article Climate change is increasing the chances of drought (Opinion) (Published September 30, 2014)
Source: Sacramento Bee
Climate Change Topics: California: Statewide / Drought /
(Posted September 30, 2014)

 

The Connection Between California's Drought and Climate Change

News article The Connection Between California's Drought and Climate Change (Published September 29, 2014)
Source: KQED Radio
Climate Change Topics: California: Statewide / Drought /
(Posted September 30, 2014)

 

California's drought linked to greenhouse gases, climate change in Stanford study

News article California's drought linked to greenhouse gases, climate change in Stanford study
Related Link: http://www2.ametsoc.org/ams/index.cfm/publications/bulletin-of-the-american-meteorological-society-bams/explaining-extreme-events-of-2013-from-a-climate-perspective/
(Published September 30, 2014)
Source: San Jose Mercury News
Climate Change Topics: California: Statewide / Drought /
(Posted September 30, 2014)

 

California drought and climate warming: Studies find no clear link

News article California drought and climate warming: Studies find no clear link (Published September 30, 2014)
Source: Los Angeles Times
Climate Change Topics: California: Statewide /
(Posted September 29, 2014)

 

California drought tied to climate change? Maybe, maybe not

News article California drought tied to climate change? Maybe, maybe not (Published September 30, 2014)
Source: San Francisco Chronicle
Climate Change Topics: California: Statewide / Drought /
(Posted September 29, 2014)

 

Explaining Extreme Events of 2013 from a Climate Perspective

Report Explaining Extreme Events of 2013 from a Climate Perspective - "This BAMS [Bulletin of the American Meteorological Society] special report presents assessments of how climate change may have affected the strength and likelihood of individual extreme events." Includes "The Extraordinary California Drought of 2013/2014: Character, Context, and the Role of Climate Change" by D. L. Swain, et al.; "Causes of the Extreme Dry Conditions Over California During Early 2013" by H. Wang and S. Schubert; and "Examining the Contribution of the Observed Global Warming Trend to the California Droughts of 2012/13 and 2013/14" by C. Funk, et al. (Published September 29, 2014)
Climate Change Topics: Drought / Precipitation, Extreme Weather / Temperature / California: Statewide /
(Posted September 29, 2014)

 

Long-Range Forecast: Less Snow for Skiers, Less Water for California

News article Long-Range Forecast: Less Snow for Skiers, Less Water for California
Related Link: http://www.usbr.gov/WaterSMART/wcra/docs/ssjbia/ssjbia.pdf
(Published September 24, 2014)
Source: KQED Radio
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted September 26, 2014)

 

State to establish sea level rise database: Gov. Jerry Brown signs Assemblyman Rich Gordon's legislation to coordinate planning

News article State to establish sea level rise database: Gov. Jerry Brown signs Assemblyman Rich Gordon's legislation to coordinate planning (Published September 24, 2014)
Source: San Mateo Daily Journal
Climate Change Topics: California: Statewide / Sea level rise /
(Posted September 26, 2014)

 

Developing Robust Strategies for Climate Change and Other Risks : A Water Utility Framework

Report Developing Robust Strategies for Climate Change and Other Risks : A Water Utility Framework - "Identif[ies] the most likely vulnerabilities typically associated with climate change, provide[s] utilities with a tool to assess their own utility-specific vulnerabilities, and produce[s] a suite of risk management tools to assist utilities in identifying appropriate strategies and actions to respond to the vulnerabilities that are identified." (Published September 23, 2014)
Source: Water Research Foundation
Climate Change Topics: Water quality / Water supply, changes in supply, snowpack / Water utilities guidance /
(Posted September 26, 2014)

 

Climate Change Vulnerability of Freshwater Fishes of the San Francisco Bay Area

Report Climate Change Vulnerability of Freshwater Fishes of the San Francisco Bay Area - "Climate change is expected to progressively shift the freshwater environments of the San Francisco Bay Area (SFBA) to states that favor alien fishes over native species. Native species likely will have more limited istributions and some may be extirpated. Stream-dependent species may decline as portions of streams dry or become warmer due to lower flows and increased air temperatures. However, factors other than climate change may pose a more immediate threat to native fishes. Comparison of regional vs. statewide vulnerability (baseline and climate change) scores suggests that a higher proportion (56% vs. 50%) of SFBA native species, as compared to the state’s entire fish fauna, are vulnerable to existing anthropogenic threats that result in habitat degradation. In comparison, a smaller proportion of SFBA native species are vulnerable to predicted climate change effects (67% vs. 82%). In the SFBA, adverse effects from climate change likely come second to estuarine alteration, agriculture, and dams. However, the relative effect of climate change on species likely will grow in an increasingly warmer and drier California. Maintaining representative assemblages of native fishes may require providing flow regimes downstream from dams that reflect more natural hydrographs, extensive riparian, stream, and estuarine habitat restoration, and other management actions, such as modification of hatchery operations." (Quinones, R. M. and P. B. Moyle, 2014, San Francisco Estuary and Watershed Science) (Published September 23, 2014)
Climate Change Topics: California: Bay Area and Delta / Ecosystems, Habitat, Threatened Species /
(Posted September 24, 2014)

 

Study links changing winds to warming in Pacific

News article Study links changing winds to warming in Pacific (Published September 23, 2014)
Source: Sacramento Bee
Climate Change Topics: California: Statewide / Temperature /
(Posted September 23, 2014)

 

West Coast warming linked to naturally occurring changes

News article West Coast warming linked to naturally occurring changes
Related Link: http://www.pnas.org/content/early/2014/09/16/1318371111.abstract
(Published September 23, 2014)
Source: Los Angeles Times
Climate Change Topics: California: Statewide / Temperature /
(Posted September 23, 2014)

 

New Report Predicts Climate Change Will Significantly Impact California's Central Valley

News article New Report Predicts Climate Change Will Significantly Impact California's Central Valley
Related Link: http://www.usbr.gov/WaterSMART/wcra/docs/ssjbia/ssjbia.pdf
(Published September 22, 2014)
Source: Association of California Water Agencies
Climate Change Topics: California: Bay Area and Delta / Ecosystems, Habitat, Threatened Species / Water quality / Water supply, changes in supply, snowpack /
(Posted September 23, 2014)

 

Our Disappearing Snows: Climate Change and Water Resources (Opinion by Peter Gleick)

News article Our Disappearing Snows: Climate Change and Water Resources (Opinion by Peter Gleick) (Published September 19, 2014)
Source: Huffington Post
Climate Change Topics: California: Statewide / Water supply, changes in supply, snowpack /
(Posted September 23, 2014)

 

Atmospheric controls on northeast Pacific temperature variability and change, 1900-2012

Report Atmospheric controls on northeast Pacific temperature variability and change, 1900-2012 - "Northeast Pacific coastal warming since 1900 is often ascribed to anthropogenic greenhouse forcing, whereas multidecadal temperature changes are widely interpreted in the framework of the Pacific Decadal Oscillation (PDO), which responds to regional atmospheric dynamics. This study uses several independent data sources to demonstrate that century-long warming around the northeast Pacific margins, like multidecadal variability, can be primarily attributed to changes in atmospheric circulation. It presents a significant reinterpretation of the region's recent climate change origins, showing that atmospheric conditions have changed substantially over the last century, that these changes are not likely related to historical anthropogenic and natural radiative forcing, and that dynamical mechanisms of interannual and multidecadal temperature variability can also apply to observed century-long trends." (Johnstone, J. A. and N. J. Mantua, 2014, Proceedings of the National Academy of Sciences) (Published September 22, 2014)
Climate Change Topics: California: Statewide / Temperature /
(Posted September 23, 2014)

 

Sacramento and San Joaquin Basins Climate Impact Assessment

Report Sacramento and San Joaquin Basins Climate Impact Assessment - Projects impacts to water deliveries, salinity in the Delta, fish species, hydropower, and flood control. Technical Appendix Past of the "West-Wide Climate Risk Assessment." (Published September 22, 2014)
Source: United States. Bureau of Reclamation
Climate Change Topics: California: Bay Area and Delta / Ecosystems, Habitat, Threatened Species / Water quality / Water supply, changes in supply, snowpack /
(Posted September 23, 2014)

 

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