Sunday, March 21, 2010

Late Season Snow And Cold Prove No Global Warming

"It's cold. So there's no Climate Change"

Facts From The National Snow
And Ice Data Center
Get ready to hear climate change deniers point to the unusual late season late snow storm and cold weather as evidence that global warming isn’t really happening.

North Texas had one of the snowiest winter seasons on record. The National Weather Service in Fort Worth reported today that North Texas got 17.1 inches of snow this cold season, ranking it No. 2 behind the 1977-78 season which got 17.6 inches.

Dallas/Fort Worth Airport recorded 1.2 inches of snow on Saturday, which shattered the old record of 0.4 inches established on March 20, 1970. An additional 0.1 inches of snow earlier today brought the weekend total to 1.3 inches. The last time an inch or more fell on North Texas was March 29, 1937, when 2 inches fell.

Union of Concerned Scientists:

There is a significant difference between weather and climate. Weather is what we experience on any given day or even over a couple weeks. Climate describes a region’s prevailing conditions — including such things as temperature, rainfall, wind, humidity and atmospheric pressure — over long periods of time. Climate is a good indicator of what to expect. For example, in the Midwest, one would expect cold winters. Whereas, in a Mediterranean climate, one would expect a generally milder winter.

Climate change refers to shifts in prevailing conditions observed over decades. One such shift is a long-term rise in global average temperatures. The current cold spells are occurring against this backdrop.

Putting aside the difference between weather and climate, climate change projections show that a warming planet generates more precipitation in areas that typically experience rain or snow. Rising ocean surface temperatures already have increased the temperature and moisture content of the air passing over the United States, setting the stage for heavier snow and rain storms.
An Intergovernmental Panel on Climate Change report found that global warming has increased the frequency of storms that dump heavy precipitation over most land regions that experience storms. Most deserts, conversely, are getting drier.
“Climate scientists aren’t at all surprised that there are more drenching rain or blizzards in certain parts of the country,” said Dr. Brenda Ekwurzel, a climate scientist with the Union of Concerned Scientists (UCS). “That’s consistent with well-documented climate change trends over the past several decades. Unless we take some dramatic steps to curb global warming, we likely will see a lot more regional precipitation over the next few decades.”

Precipitation in the Northeast has increased markedly over the last century, according to the Northeast Climate Impact Assessment, a collaboration between UCS and a team of more than 50 scientists and economists. Over the past few decades, winter precipitation in the Northeast has increased 0.15 inch per decade.

The Northeast is not alone. According to Global Climate Change Impacts in the United States, released last year by 13 federal agencies, Great Lakes states are experiencing more precipitation because the lakes have less ice and more open water in the winter. The maximum seasonal coverage of Great Lakes ice decreased approximately 30 percent from 1973 through 2008. That means more lake water is likely to evaporate into the atmosphere, resulting in heavier snowstorms.

The current decade likely ranks as the hottest since temperature records began in the 1850s, the U.N. World Meteorological Organization announced in December 2009. On December 8th 2009, at the Climate Change Conference in Copenhagen, Michel Jarraud, Secretary-General of the World Meteorological Organization (WMO), reported that 2009 was likely to rank in the top 10 warmest years since 1850. He added that since 1980 every decade has been warmer than the previous one. He also stressed that greenhouse concentrations were highest now than at any time over the last 800,000 years.

While conservative Republican lawmaker continue to strongly deny all evidence of climate change, Military planners in the Pentagon have concluded that “global warming is now officially considered a threat to U.S. national security.” In its upcoming 2010 Quadrennial Defense Review, Pentagon planners will report that climate change could result in food and water scarcity, pandemics, population displacement, and other destabilizing events that could create conflict.
“The American people expect the military to plan for the worst,” says retired Vice Adm. Lee Gunn, a 35-year Navy veteran now serving as president of the American Security Project. “It’s that sort of mindset, I think, that has convinced, in my view, the vast majority of military leaders that climate change is a real threat and that the military plays an important role in confronting it.”

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