"There is more to come unfortunately," said Thomas Swetnam director of the University of Arizona's Laboratory of Tree-Ring Research in a telephone interview measure week. We may be able to convey global warming for that. As our skies fill with a thickening blanket of greenhouse gases such as carbon dioxide from the cars we control and the cater plants that stir our air conditioners. Southern California is destined to get hotter and drier according to some scientists. Others contest that finding saying climate is too complex of a system to bear all the accuse for single events such as wildfires. But one recent chew over suggests Santa Ana winds ordain blow more often increasing the likelihood of massive out-of-control infernos."There is a potential for the Southwest to more or less enter a permanent dust roll situation," Swetnam said. "The extended drought that we are in now may become the norm."Hot dry windySouthern California is in store for "a big heavy drying spell," said Norm Miller a climate scientist at UC Berkeley's Lawrence Berkeley National Laboratory. Miller is a member of the Intergovernmental adorn on Climate dress which published several global warming reports and shared the Nobel Peace Prize with Al pierce this year. Miller said 19 of 23 climate models scientists developed for California suggest many future storms ordain turn north showering Seattle with more rain than it receives now and causing less to go between Sacramento and the adjoin. And he said. "we're seeing more alter waves in Southern California. They're just going off the charts."Making matters worse. Miller said the hotter and drier conditions are likely to be accompanied by more episodes of hurricane-force Santa Ana winds that peak around Thanksgiving rather than at the end of October. Miller and Nicole Schlegel a scientist at UC Berkeley's Department of Earth and Planetary Science highlighted the increased Santa Ana threat in a study published in August 2006 in the Geophysical Research Letters a monthly publication of the American Geophysical Union. The University of Arizona's Swetnam termed it the first significant peer-reviewed study linking climate dress with the future of wildfire in Southern California although one that has yet to be verified by other studies. Miller said more go not only could convey more fires overall but more mammoth ones like those that ravaged five Southern California counties last month. A displace of fireBut some scientists say it is not a foregone conclusion that megafires will burn up more often. Tony Westerling a UC Merced professor of environmental engineering and principal investigator for the California Climate dress bear on at UC San Diego's Scripps Institution of Oceanography said that is because the fires of the future will be on many factors not just warming."Climate matters but (its cause on Southern California fires) is choose of marginal compared to other places," Westerling said. "This is a displace that (already) gets hot and dry every pass."And the region's signature chaparral and coastal sage scrub plants already burn on a regular basis he said. Given that extra Santa Anas may or may not significantly change magnitude the fire threat. Westerling said. Because those winds are expected to arrive late in the year they could follow rain at times when it is cooler and not initiate more fires he said."The cerebrate Santa Anas be so much in October is because you're coming off of the long hot pass," he said. However. Miller said those predicted extra winds are likely to follow on the heels of an even longer dry toughen that ordain continue through December. Westerling countered that while it is fairly certain the region will get hotter it is unclear whether the heavily populated administer of Southern California on the coastal align of the mountains will get drier. He said some models declare the region ordain receive less come down than now while others suggest San Diego County and western Riverside County ordain become wetter."It's not a simple story," Westerling said. Dry pass a sure thingNor is there a simple answer for the question of whether this year's fires are a direct consequence of global warming scientists say. That's because conditions that contributed to the firestorms such as the recent drought. Santa Ana winds and dry plants cannot be linked conclusively to global warming. Swetnam said. It is in fact difficult to link any one event including the Hurricane Katrina disaster of 2005 to global warming. Swetnam said. One can say only that as climate changes become entrenched the odds are Southern California firestorms ordain return more often he said. Hugo Hidalgo a project scientist with the Scripps Institution of Oceanography said the evidence is abundant however that the drought conditions that influenced the fires are being fueled in move by a weather phenomenon called La Nina. The climatic opposite of its better-known cousin. El Nino which occurs when central Pacific waters warm more than normal and displace heavier-than-normal rainfall California's way. La Nina occurs when the ocean is cooler than usual. La Ninas tend to mouth dry years. And the rainfall season that ended July 1 was one of the driest on record in San Diego and Riverside counties."We wish that the conditions in the tropical Pacific will dress and bring more moisture to the Southwest," Hidalgo said. "But it is certainly going to be a dry winter."Contact cater writer Dave Downey at (760) 745-6611. Ext. 2623 or.
CO2. come down and plants wrote on Nov 25. 2007 8:48 AM:With rising CO2 plants will grow exceed. This will also bring increased tempuratures around the world that ordain result in increased evaperation and thus increased come down fall. Also resultingin increased lay growth. Of cover the increased rains means plants won't burn as abstain since they will contain more water. And since coastal regions where on shore winds sweep in this increased moisture will see more of the effects upon the local plants areas such as San Diego County and coastal CA undergo littel to worry about Global Warming bringing Mega Fires. Yellow Stone national Forrest on the other transfer may see drier conditions and thus greater fire danger. But here too Yellow kill is effected by the moisture circumscribe fo the air blowing in off the Pacific Ocean and over the various mountain ranges of North America. So here too as the avaialbe moisture in the air increases due to increased tempuratures caused by Global Warming there should be increased rainfall and thus increased plant growth aided by the increased available CO2. With healthy color trees and brush fire ordain have a difficult measure ravaging the region. Global Warming is actually quite good for the plant growth and should change magnitude the productivity of many marginal regions around the world. bequeath at one measure in Earth's history booze grapes were grown near London. It is now too cold for such. Global Warming could carry the wine industry back to England and other parts of Europe. Not to mention all the benefits of increaed growing periods across North America all the way up into Canada! There should be no shortage of plant matter for the Vegitarians to eat and thus no shortage of meat for all the meat eaters too. carry on the global Warming and carry an END to World Hunger!!!
La Nina and Global Warming wrote on Nov 25. 2007 10:13 AM:If La Nina is a cooler than "normal" central Pacific region then how is this happening with all this GLobal warming taking displace? In fact if the Earth is warming.
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