It’s not easy to survive century after century, through droughts and storms and oscillations of the climate. So California’s majestic coastal redwoods have developed a few tricks, like their great height: The trees can grow to more than 350 feet high, allowing their treetops to pull in moisture from the fog to keep their water levels refreshed. But, according to a new study in the Proceedings of the National Academy of Sciences, the fog is on the decline, which could spell trouble for redwoods and other area species.
Fog often rolls ashore along the California coast from June through September. The hot, dry inland air rises and creates a vacuum that sucks in the cold, vaporous air from over the ocean [Wired.com]. While the small strip of land about 50 miles inland from the coast where the redwoods live is dry and hot, this influx of moisture keeps the giant trees hydrated.
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After 20 years in one spot, anyone can get restless. That goes for the famous sea lions of San Francisco’s Pier 39. They swelled to their largest population ever just a couple months ago and then almost totally disappeared this month, baffling local marine experts.
The animals have been a fixture on Pier 39 since 1990, when a big herring run lured the sea lions into San Francisco Bay. The Marine Mammal Center gets so many questions about the 1,000-pound creatures that the nonprofit staffs a small kiosk on Pier 39; the pier’s insignia includes the silhouette of a sea lion [San Francisco Chronicle]. In October more than 1,700 sea lions laid about on Fisherman’s Wharf. But the exodus began the day after Thanksgiving, and by yesterday only 10 remained hanging out near the docks.
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Groundwater levels around the country have been sinking as wells for drinking water and irrigation pull water out of aquifers faster than they can naturally recharge. Now, using gravity-measuring satellites, NASA and California researchers have documented the extent of water loss in California’s Central Valley, and the results aren’t good.
The measurements show the amount of water lost in the two main Central Valley river basins within the past six years could almost fill the nation’s largest reservoir, Lake Mead in Nevada [AP]. The total is about 30 cubic kilometer; one cubic km contains more than 264 billion gallons of water.
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In a central California area with a history of dramatic earthquakes, researchers have detected a worrisome amount of seismic activity deep underground. The researchers looked at data from 76 monitoring stations along the central California stretch of the San Andreas fault, and found that almost 2,200 “deep earth tremors” had shaken the earth since 2001, a span of time that included two earthquakes. Tremors increased around the time of those two quakes in 2003 and 2004, and rates have remained high since then. “What’s surprising is that the activity has not gone down to its old level” [Reuters], says study coauthor Robert Nadeau. It’s possible that the continuing tremors could presage another quake, researchers say.
Tremors vibrate quietly and can continue for days. Tremors also tend to happen in a deeper, softer part of the Earth’s crust, rather than in the upper part typically thought to generate earthquakes [Los Angeles Times]. Researchers don’t yet know whether tremors are accurate predictors of the larger earthquakes that can convulse the earth’s surface, but Nadeau says they may be a symptom of stress building up on a fault. “We’ve shown that earthquakes can stimulate tremors next to a locked (fault) zone, but we don’t yet have evidence that this tells us anything about future quakes,” Nadeau said…. “But if earthquakes trigger tremors, the pressure that stimulates tremors may also stimulate earthquakes” [San Francisco Chronicle].
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President Obama proposed new fuel efficiency standards today, establishing the first nationwide regulation for greenhouse gases [Washington Post]. The proposal is centered around the strictest plan ever for increasing fuel standards for passenger vehicles, sharply raising pressure on struggling automakers to make more efficient cars and trucks [Reuters]. Under the plan, cars would be required to reach an average efficiency of 35.5 miles per gallon (mpg) by 2016—four years earlier than the deadline imposed by the 2007 energy bill. Light trucks would be required to reach 30 mpg.
The new rules would pose a challenge for car manufacturers: the White House estimates the current average efficiency to be 25 mpg. The new standards would resolve the spat between California and auto manufacturers over implementing the state’s emissions regulations [ClimateWire]. In return for the strict national rules, California will drop its plans to impose strict state-wide standards for fuel efficiency, which had been bitterly resisted by both carmakers and President George Bush. In practice California’s rules tend to override milder national regulations, as it is cheaper to follow them than to produce different vehicles [The Economist].
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Before the end of the year, the backhoes are expected to dig into the dirt on a patch of coastal land in southern California, as construction begins on a massive plant that will draw fresh water from the salty sea. California regulators have given the green light for the construction of the largest desalination plant in the Western Hemisphere in Carlsbad, California, overriding environmental protests.
Some green groups are appealing the plant’s approval to a state water board, but officials with Poseidon Resources, the development company, seem confident that construction will begin on schedule. When the plant cranks up to high gear, engineers expect it to produce enough fresh water for 110,000 households in the San Diego area.
Advocates of desalination tout its potential for limiting strain on scarce water supplies, and easing the environmental consequences of diverting freshwater from rivers and streams and pumping it long distances to urban centers. But critics cite major environmental drawbacks — namely the harm to marine life from intake pipes that suck water into desalination plants and from the highly concentrated brine byproduct that gets discharged back into the ocean [Reuters]. In the environmental agreement hammered out between Poseidon and the San Diego Regional Water Quality Control Board, the company will create 55 acres of wetlands as breeding grounds for fish to offset those killed by the plant’s operations. The company has also pledged to keep brine concentrations below toxic levels.
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By the year 2100, ocean levels may have risen twice as much as was predicted just two years ago, researchers announced at the International Scientific Congress on Climate Change in Copenhagen. This means that the lives of some 600 million people living on low-lying islands, as well as those living in Southeast Asia’s populous delta areas, will be put at serious risk if climate change is not quickly and radically mitigated [The New York Times]. Meanwhile, a separate study has cataloged the damage that rising seas would do to the California coastline.
Previous estimates of sea level rise from the Intergovernmental Panel on Climate Change didn’t take full account of the rapid melting of mountain glaciers and Greenland and Antarctic ice sheets, researchers in Copenhagen said. Antarctica, in particular, was thought to be little affected by global warming until recent research proved definitively that the southern continent is heating up. Taking into account the new findings, the upper range in the rise of sea levels could be approximately 1 meter (3.28 feet), “possibly more,” by 2100. At the lower end of the spectrum, it appears increasingly unlikely, say the study’s authors, that sea level rise will be much less than a half-meter by 2100…. “Two or three years ago, those making this type of statement were seen as extremists” [The New York Times], says study coauthor Eric Rignot.
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To kick off the second week of his administration and signal his commitment to environmental and energy issues, President Barack Obama today asked the Environmental Protection Agency to consider allowing states to set their own strict standards for auto emissions. He also ordered the Department of Transportation to develop national standards for fuel efficiency. The moves are aimed at reversing decisions by [the] Bush administration, which he said had stood in the way of bold action by California and other states to limit greenhouse gas emissions from automobiles. “The days of Washington dragging its heels are over,” Obama said [Washington Post].
In 2007, the EPA administrator denied requests from California and 13 other states for waivers allowing them to set stricter standards for vehicles’ carbon dioxide emissions, despite the fact that the agency’s own staff scientists recommended granting the waivers. During a signing ceremony in the East Room at the White House, Obama made it clear that he sees a pressing need to address the United States’ dependence on foreign oil and the planet-wide threat of global warming caused by greenhouse gas emissions. “Year after year, decade after decade, we’ve chosen delay over decisive action. Rigid ideology has overruled sound science. Special interests have overshadowed common sense” [ABC News], he said.
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California is striking a blow against obesity and heart disease: On Friday, Governor Arnold Schwarzenegger signed a bill outlawing the use of trans fats in all restaurants and bakeries. The bill creates the first state-wide ban of trans fats, but follows the path set out by cities like New York City and Philadelphia, which have already evicted the substance from restaurants within city limits.
Trans fats are created by pumping hydrogen into liquid oil at high temperature, a process called partial hydrogenation. The process results in an inexpensive fat that prolongs the shelf life and appearance of packaged foods and that, many fast-food restaurants say, helps make cooked food crisp and flavorful [The New York Times]. The artificial fats have been shown to increase levels of “bad” cholesterol and decrease levels of “good” cholesterol, and are therefore linked to heart disease.
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A federal judge declared that California‘s water management system is jeopardizing the existence of the state’s salmon and steelhead, which have to navigate the complicated network on their journeys out to the ocean and back to their riverine spawning grounds. The judge’s ruling established that the canals and pumps that deliver water to 23 million Californians are causing “irreparable harm” to two salmon species, as well as the threatened Central Valley steelhead [AP].
The judge stopped short of ordering immediate remedies like storing more water behind Shasta Dam, which could be released later to help migrating fish. But the judge’s conclusions mean regulators will be forced to impose more protective conditions when they issue a new permit in March, lawyers said. “It’s a clear signal that business as usual in the Delta is not going to be acceptable,” said Kate Poole, a lawyer for the Natural Resources Defense Council [Contra Costa Times].
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Researchers working at California‘s San Andreas Fault say they detected subtle geological shifts that occurred hours before two small earthquakes, raising the possibility that scientists could eventually develop an early warning system to get people out of harms way well before the earth started to tremble.
“If you had 10 hours’ warning, from a practical point of view, you could evacuate populations, you could certainly get people out of buildings, you could get the fire department ready,” said co-author Paul Silver of the Carnegie Institution for Science, Washington. “Hurricane [warnings] give you an idea of what could be done” [BBC News].
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Just weeks after the U.S. Senate failed to pass a sweeping set of regulations to slow global warming, the state of California is pointing the way forward. California air regulators today announced a bold plan to slash greenhouse gas emissions that would alter the way utilities generate electricity, automakers build cars and developers construct buildings, and launch the nation’s broadest market in carbon-credit trading [Los Angeles Times].
The 99-page document really marks the beginning of negotiations over the finer policy details; that debate will continue until the end of 2010. One point of contention is the state’s proposal to force automakers to curb emissions of greenhouse gases from new California vehicles more quickly than required under federal mileage standards – a proposal currently blocked by the Bush administration [Sacramento Bee].
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They were starting to look like the next big thing in biotech. Personal genetics testing companies have been popping up in the last few years, offering regular citizens the chance to pay about a thousand bucks to see their own genomes. The companies say this service can give people insight into their chances of developing inherited diseases and can cast light upon their ancestry, and consumers have begun to plunk down their money.
But now there’s a hitch. Regulators in California sent “cease and desist” letters to 13 companies last week, ordering them to stop offering testing to California residents until they can prove that they have the proper clinical laboratory license, and, more importantly, that each genetics test was ordered by a doctor. The [Public Health Department] said it began investigating gene-testing companies after receiving complaints from consumers “about the accuracy and cost of genetic testing advertised on the Internet” [San Jose Mercury News].
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It’s official: California is in a state-wide drought, according to Governor Arnold Schwarzenegger. Following the driest spring in 88 years, the state’s reservoirs are low, its farmers are complaining, and its forests are tinder-dry, which may lead to more forest fires like the one that scorched the Santa Cruz mountains two weeks ago.
In giving the current dry spell the official “drought” stamp for the first time since 1991, the governor cleared the way for water transfers to stricken areas and a possible infusion of federal aid to speed water conservation projects. But Schwarzenegger stopped short of declaring a water emergency, which would permit water rationing.
Some researchers have wondered whether the state is already suffering the early effects of global warming, which is predicted to alter California ecosystems by raising temperatures, and thus allowing less snow to build up in the mountains of Northern California.
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