mrbeast |
08-29-08 01:17 PM |
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Originally Posted by SUBMAN1
Hardly wrong. Antartica has seen the biggest increase in modern times. The ice has been shown to do this too.
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Subman, the article has a postscript in which Steve Goddard (the author) admits, after a rebutal from Walt Meier of the NSIDC, that the data he challeneged from the NSIDC was afteral correct, effectively de-bunking the major point in the article. Goddard writes
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"Dr. Walt Meier at NSIDC has convinced me this week that their ice extent numbers are solid. So why the large discrepancy between their graphs and the UIUC maps? I went back and compared UIUC maps vs. NASA satellite photos from the same dates last summer. It turns out that the older UIUC maps had underrepresented the amount of low concentration ice in several regions of the Arctic. This summer, their maps do not have that same error. As a result, UIUC maps show a much greater increase in the amount of ice this year than does NSIDC. And thus the explanation of the discrepancy."it is clear that the NSIDC graph is correct, and that 2008 Arctic ice is barely 10% above last year - just as NSIDC had stated."
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As to the increases in Antarctic sea ice, I'll let the experts at the NSIDC do the talking:
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What about wintertime Antarctic sea ice—is it increasing or decreasing?
Wintertime Antarctic sea ice is increasing at a small rate and with substantial natural year-to-year variability in the time series. While Antarctic sea ice reached a record annual maximum in March 2008, this does not indicate a significant long-term trend. To borrow an analogy from sports, one high day, month, or even year of sea ice is no more significant than one early-season win would be in predicting whether the hometown team will win the Super Bowl ten seasons from now.
Another important point is that the increase in Antarctic sea ice extent is not surprising to climate scientists. When scientists refer to global warming, they don’t mean warming will occur everywhere on the planet at the same rate. In some places, temporary cooling may even occur. Antarctica is an example of regional cooling. Even our earliest climate models projected that Antarctica would be much slower in responding to rising greenhouse gas concentrations than the Arctic. In large part, this reflects the nature of the ocean structure in Antarctica, in which water warmed at the surface quickly mixes downward, making it harder to melt ice.
In terms of sea ice, climate model projections of Antarctic sea ice extent are in reasonable agreement with the observations to date. It also appears that atmospheric greenhouse gases, as well as the loss of ozone, have acted to increase the winds around Antarctica. Perhaps counterintuitively, this has further protected the Antarctic from warming and has fostered more ice growth.
The one region of Antarctica that is strongly warming is the Antarctic Peninsula, which juts out into the Atlantic Ocean and is thus less protected by the altered wind pattern. The Antarctic Peninsula is experiencing ice shelf collapse and strongly reduced sea ice.
Finally, even if wintertime Antarctic sea ice were to increase or decrease significantly in the future, it would not have a huge impact on the climate system. This is because during the Antarctic winter energy from the sun is at its weakest point; its ability or inability to reflect the sun’s energy back into space has little affect on regulating the planet’s temperature.
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BTW I thought you said the ice was down just now in the Antarctic
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Originally Posted by SUBMAN1
....It is just down in Antarctica right now.
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So you did!
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Also, if my article is wrong, how come the the sat data agrees with it?
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So apart from the fact that the author of the article has effectively retracted his thesis, which data is this, post it.
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I guess I could tell you the moon is made out of rock, but if you believe it cheese, by god, Mr Beast says its made of cheese! :p
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Since you bring it up; mainly Cheddar in the northern hemisphere, with a band of Feta around the Lunar Equator changing to Gorgonzola in the South with outcrops of Rochefort. Unfortunately the predictions of vast deposits of Parmasan lying just under the surface proved to be incorrect. :D
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I'm done arguing with you (Besides, it just ticks Neal off when we bicker). Just post relevant links to current data.
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Come on Subman that just sounds like a cop out! :)
I've posted links to data and given a couple of fairly detailed answers, if anyone is bickering here then I'm afraid it isn't me.
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