NEW YORK, USA, April 3, 2009: The year 2008 was cooler than 2007. Is that a good sign for global warming? A group of climate skeptics has even coined the term “ßlobal cooling”†since the 1998 peak in global temperature.br /br /But Scientists have verified that a relative drop in the average yearly temperature, as seen in the last few years, is expected as a normal climate pattern. br /br /Cooler periods, called “cool spells”–some ten years or more in length–recur at fairly regular intervals. The problem is, recent cool spells each tends to be warmer than the preceding cool spell. Moreover, they are followed by a warmer spell whose temperatures exceed those of the preceding warm spell. In summary, the average temperature goes up more than it goes down.br /br /In the simulation, global temperatures would continue to drop until 2010, and then raise quickly starting at 2011, to be warmer than at any point in recent history. The recent cool spell might be masking some effects of global warming, scientists say. br /br /The data shows a graph of temperatures since 1975 that demonstrates the fallacy of making any temperature projections based on short-term trends, such as a mere ten years. /phr /
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