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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?


To: Land Shark who wrote (1101119)11/22/2018 11:39:27 AM
From: longnshort  Read Replies (2) | Respond to of 1584048
 
make the base line from 1998 The answer might lie in the fact that 1998 was arguably the warmest year on record. "The reason we had such a warm 1998 is that we had a very, very strong El Niño, probably one of the strongest El Niños of the twentieth century," explains David Easterling, Chief of the Scientific Services Division at NOAA's National Climatic Data Center. "If you have a very strong El Niño-an extensive swath of the ocean's surface with much-warmer-than-average temperatures-that tends to warm the globally averaged air surface temperature."


David Easterling of NOAA’s National Climatic Data Center.

If global temperatures from subsequent years are compared to those of 1998, warming since that time is certainly difficult to detect. Easterling himself pointed out in a 2009 paper that a linear trend line from 1998 to 2008 shows no statistically significant trend up or down. While a straight line drawn from 1998 to 2008 does indicate that 2008 was cooler, a line from 1999 to 2008 shows that the planet warmed, and a line from 1997 to 2008 is almost flat