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2 hottest years: 2005 & 2010
Temperature change for the time period 1990 to 2010 from the NASA GISS and HadCRUT datasets. The GISS dataset has global coverage and therefore well represents the global average temperature, while the HadCRUT dataset has poor coverage in the Arctic where global warming is happening much faster than the global average. Both datasets clearly show the increasing temperature trend over the 30-year period that underlies the variability caused by such factors as El Nino/La Nina, the solar cycle, and volcanic eruptions.
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