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Critical Global Water Questions
Recent intense heatwaves in India and widespread U.S. droughts have highlighted the need for a global approach to tackling chronic water shortages. The problem is that most governments are not equipped to deal with these challenges of water scarcity, sanitation and climate dynamics.
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Add-on Benefits of Natural Defenses Against Sea-Level Rise
Researchers modeled how investing in environmental conservation and protection can help San Mateo County, California, adapt to rising seas. The findings provide incentives for policymakers to prioritize nature-based approaches when planning for sea-level rise.
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Groundwater Depletion Causes California Farmland to Sink
A new study simulates 65 years of land subsidence, or sinking, caused by groundwater depletion in California’s San Joaquin Valley. The results suggest significant sinking may continue for centuries after water levels stop declining but could slow within a few years if aquifers recover.
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California Hydropower Could Be Cut in Half This Summer: Report
A third year of drought spells less hydropower, more natural gas, and higher electricity prices. The U.S. Energy Information Administration, or EIA, reported last week that as reservoir levels dip far below their historic averages, electricity generation from California’s hydroelectric dams could be cut in half this summer.
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Challenges to Tidal Flats Pose Risks to 41M Americans Living in Coastal Counties
About 29 percent of the United States’ population live in coastline counties – more than 41 million are in Atlantic counties. This high population density poses a critical challenge to sustainable developments in coastal areas.
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Hydropower’s Future Is Clouded by Droughts, Floods and Climate Change – It’s Also Essential to the U.S. Electric Grid
The United States has over 2,100 operational hydroelectric dams, with locations in nearly every state. They play essential roles in their regional power grids. But most were built in the past century under a different climate than they face today. As global temperatures rise and the climate continues to change, competition for water will increase, and the way hydropower supply is managed within regions and across the power grid in the U.S. will have to evolve.
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Diminishing Snowmelt to Make Colorado, Utah, Wyoming Resemble the Arid Southwest
New research predicts that changes in mountain snowmelt will shift peak stream flows to much earlier in the year for the vast Colorado River Basin, altering reservoir management and irrigation across the entire region. As a result, upper basin in Colorado, Utah, and Wyoming may more closely resemble the arid Southwest.
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Climate Change Could Spark the Next Pandemic
As the Earth’s climate continues to warm, researchers predict wild animals will be forced to relocate their habitats — likely to regions with large human populations — dramatically increasing the risk of a viral jump to humans that could lead to the next pandemic.
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Droughts Self-Propagate, Just Like Wildfires
Unlike other weather extremes such as hurricanes or winter storms, droughts affect humans in most climatic zones around the world; from the arid steppes of the Sahel to the humid rainforests of Amazonia. Moreover, droughts are expected to intensify in many regions following global warming.
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Scientists Identify the Most Extreme Heatwaves Ever Recorded Globally
Heatwaves are one of the most devastating extreme weather events. The western North America heatwave was the deadliest weather event ever in Canada, resulting in hundreds of fatalities. The associated raging wildfires also led to extensive infrastructure damage and loss of crops.
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Water Scarcity Predicted to Worsen in More than 80% of Croplands Globally
Global warming is inexorably leading to water scarcity, and more than 80 percent of the world’s croplands will be affected by this scarcity by 2050. One way to mitigate the effects of growing scarcity is improving irrigation infrastructure and irrigation efficiency.
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Western River Compacts Were Innovative in the 1920s but Couldn’t Foresee Today’s Water Challenges
The Western U.S. is in a water crisis, from California to Nebraska. An ongoing drought is predicted to last at least through July 2022. Recent research suggests that these conditions may be better labeled aridification – meaning that warming and drying are long-term trends.
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As Lake Powell Dries Up, the U.S. Turns to Creative Accounting for a Short-Term Fix
A new agreement calls for Western states to leave their drinking water in the reservoir — and act as if they didn’t.
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What Choices Does the World Need to Make to Keep Global Warming Below 2 C?
A new modeling strategy, which explores hundreds of potential future development pathways, provides new insights on the energy and technology choices needed for the world to meet that target.
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To Reduce Growing Climate Dangers, the World Needs to Consider Sunlight Reflection
Nothing about the present climate crisis or its implications is natural. Perhaps how the world deals with a warming planet shouldn’t be either.
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The long view
Huge Areas May Face Possibly Fatal Heat Waves if Warming Continues
A new assessment warns that if Earth’s average temperature reaches 2 degrees C over the preindustrial average, widespread areas may become too hot during extreme heat events for many people to survive without artificial cooling.