Climate Change

Global Warming

What is the global average temperature?

Data on temperatures for the twentieth century, which includes both land and ocean surface temperatures, averaged to 53.6°F (12°C). A 2007 assessment showed that, during the early years of the twenty-first century, average temperatures were already up 1.28°F (0.71°C) compared to the previous century averages. This data includes a very warm year in 2002 (though 1998 was actually the warmest year since 1990), and the fact that, taken by themselves, land-surface temperatures have been particularly warmer: 3.4°F (1.89°C). Ocean surface temperatures in 2007 were the fourth warmest in a record database spanning 128 years.


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