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Snowmaggeddon - Arctic Oscillation not AGW
the eastern seaboard's harsh winter is neither a sign of global warming nor is it denier evidence, it is an Arctic Oscillation
Date: 2/26/2010 8:17:51 PM ( 14 y ) ... viewed 2462 times
If you have been thinking about how the snowstorms on the USA's eastern seaboard relates to global warming, please stop. Those snowstorms are a local and current event [one season of one year] and global warming is long term - only the average temperature of the entire world is what counts, the "global average temperature".
Please, keep this quote in mind:
"The 2009 global temperature analysis released by NASA's Goddard Institute for Space Studies (GISS) shows that, globally, 2009 was tied for the second hottest year on record."
There was a lot of unusual snow this winter in America and in Europe, and even Korea. Some people say that it means global warming is not happening.
I think I can show that it is not true, and that these freaky snowstorms are more or less normal - for one thing, if it is a "once in a 100 year event", they snows like this SHOULD happen every 100 years, so we were due for it, like with earthquakes.
As an even better explanation, the exact mechanism that brought cold air from the Arctic to clash with the moist air from the Pacific is known as the "Arctic Oscillation", which creates high air pressure patterns in the Arctic and that high air pressure pushed the cold Arctic air south to the eastern seaboard.
Also, as concerns global warming, as the atmosphere warms the air holds more moisture, and when it does fall as rain or snow there will be more of the rain or snow than there would be in a cooler atmosphere [which may or may not be a factor in the snowstorms of this winter]. These kind of weather events fall in line with climate change theory, and so they could be evidence of global warming and climate change.
What we should keep in mind is that local and current events are not good evidence to form an opinion from about something that is global and occurs over many decades, such as global warming.
Link to article that explain the European and America snowfalls of this winter:
http://tinyurl.com/yh9qowx
Quotes from that link:
KEY POINTS
* Climate change is not proven nor disproven by individual warming or cooling spells. It's the longer-term trends, of a decade or more, which place less emphasis on single-year variability, that count.
* The past few months have seen a particularly cold winter in parts of the U.S. and elsewhere.
* This has been the result of the "Arctic oscillation" — a see-sawing pressure system over the North pole — that has driven cold air into more southern latitudes.
* These cold spells, and other weather changes that are a result of naturally occurring patterns, are still consistent with a globally warming world.
* The 2009 global temperature analysis released by NASA's Goddard Institute for Space Studies (GISS) shows that, globally, 2009 was tied for the second hottest year on record.
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