By Mimikatz
The fog came in on big lion's paws last evening once the sun set, bringing some respite from the worst heat wave of my 63 years in California. Remember San Francisco is legendary for its cold summers. June and September are sometimes hot, but not July and August. Hence Mark Twain's famous comment that the coldest winter he ever spent was a summer in San Francisco. In fact, San Francisco is the only city in the Northernm Hemisphere where the mean temperature in July is lower than the mean temperature in October, as many an unsuspecting and shivering tourist has discovered. Usually the fog's influence extends to the East Bay and moderates temperatures in the inland valleys after a few days. But Saturday it was 102 degrees in Oakland at a bank I drove by, and in the interior valleys it went up to a high on Sunday of 116 in Danville--hotter even than Phoenix, and a friend said it was 117 in Ukiah. Normally hot Sacramento hit 111 on Sunday, hotter than normal. But, as we say here, at least it was dry heat.
For the first time in 5 years we had a threat of rolling blackouts, and the heat caused scattered power outages. At least 16 deaths were blamed on the heat, mostly among the elderly. Air conditioned senior centers were opened to provide respite in East and South Bay areas where most people do not have air conditioning.
The culprit was said to be a high pressure ridge over the Southwest, but some scientists were willing to discuss the impact of global warming. The first 6 months of 2006 are the hottest on record.
"I think there are very good reasons to believe that the current U.S. heat wave is at least partly caused by global warming," Kevin Trenberth, one of the nation's top global-warming computer modelers, wrote in an e-mail.
In recent years, studies by several scientific teams show that "the frequency of cold nights dropped everywhere, and warm nights increased everywhere" around the world, said Trenberth, a scientist for the Climate Analysis Section of the National Center for Atmospheric Research in Boulder, Colo. "Heat waves have also increased most places around the world."
A noted atmospheric scientist and climate modeler, Govindasamy Bala of Lawrence Livermore National Laboratory, agreed.
"It is true that the current heat wave could have occurred by chance. But I believe that the likelihood of such occurrences increases due to global warming," Bala said.
Note it was 113 degrees in Livermore on Sunday. Other scientists such as Florida's state climatologist James O'Brien, a skeptic about the impacts of global warming, "said the heat wave was caused by high sea-surface temperatures in the tropical Pacific." What caused the high sea-surface temperatures was not discussed. As with hurricanes, most scientists seem to believe that even if global warming doesn't "cause" heat waves, it can make those that do occur worse.
Chris Field, director of the Department of Global Ecology at the Carnegie Institution of Washington's branch at Stanford University, said scientists can't attribute singular weather events to global warming. But many studies conclude that heat waves tend to get hotter as the planet warms.
"This week's heat wave might or might not have occurred without global warming, but it is a good bet that heat waves will be hotter and more frequent in the warmer world," Field said.
Michael Mann, a leading global warming expert at Pennsylvania State University, agreed, saying climate change is "stacking the deck" and making heat waves more likely.
"As we see more and more such record-breaking extremes," Mann said, "we can increasingly implicate climate change for the shift. This holds for heat waves, droughts and intense tropical storms."
So is global warming a hoax as Senator James Inhofe (R-OK) claims? Or is Al Gore right? We are a lot more likely to find out in time if this man succeeds retiring Sherwood Boehlert as Chairman of the House Science Committee rather than turncoat former Dem Ralph Hall of Texas, in case you need one more reason to work for a Democratic House.