drought

Overdrafting California’s Groundwater Resources–A Chronic Condition

A recently issued study by a University of Texas-led group of research scientists confirm a discomforting fact: groundwater resources in California’s Central Valley are being depleted at an alarming rate.  As reported in the Sacramento Bee, the study warns that current groundwater extraction rates from the Central Valley aquifer–which is primarily mined to serve agricultural …

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Heat Waves, Droughts, and the Energy System

According to the IPCC,  it “is very likely that hot extremes, heat waves, and heavy precipitation events will continue to become more frequent.” For instance, by midcentury, the number of heat wave days in Los Angeles is expected to at least double over the late twentieth century, and quadrupling is expected by the end of …

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Dry as Dust

A new literature survey and synthesis has some grim news about drought: Dry periods lasting for years to decades have occurred many times during the last millennium over, for example, North America, West Africa, and East Asia. . . . Climate models project increased aridity in the 21st century over most of Africa, southern Europe …

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Tell Your Reverend To Go Jump In The Lake

Dan, your post is thoroughly persuasive to me, but I’m not sure that it would persuade many climate skeptics.  There are two reasons for this: 1)  You assume that there is at least a 50/50 chance of climate change occurring.  That is a highly conservative assumption — except for climate skeptics.  Most climate skeptics are …

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The Reverend Bayes Visits Lake Mead

Land Letter reports that Lake Mead has continued to recede in the face of an 11-year drought, as we are apparently heading into a La Nina period that will probably continue the drought.  This will put some pressure on adaptation measures, particular in terms of Las Vegas: For Las Vegas, which draws 90 percent of …

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Delta news roundup

It’s been a busy and discouraging ten days for those interested in the Sacramento-San Joaquin Delta as either an ecosystem or a water source. The San Francisco Chronicle reported that the return of fall chinook salmon to the Sacramento River hit a record low last year. The Pacific Fishery Management Council released a gloomy preseason …

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Preview of a long dry summer

It’s still the rainy season, but California’s drought is already beginning to affect operation of the state and federal water projects that divert water from the Sacramento and San Joaquin watersheds to serve cities and farms from the Bay Area to Southern California.  Yesterday the California Department of Water Resources and U.S. Bureau of Reclamation, …

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Dust Bowl Redux

[youtube=http://www.youtube.com/watch?v=zqiblXFlZuk]According to a story in Tuesday’s New York Times: The new study, published in the Proceedings of the National Academy of Sciences, projects that if carbon dioxide concentrations peak at 600 ppm, several regions of the world — including southwestern North America, the Mediterranean and southern Africa — will face major droughts as bad or …

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