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Global temperature record

The global temperature record shows the fluctuations of the temperature of the atmosphere and the oceans through various spans of time. The most detailed information exists since 1850, when methodical thermometer-based records began. There are numerous estimates of temperatures since the end of the Pleistocene glaciation, particularly during the current Holocene epoch. Older time periods are studied by paleoclimatology.

 
Note:   The above text is excerpted from the Wikipedia article Global temperature record, which has been released under the GNU Free Documentation License.
 

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