Thermal Equator

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Related to Thermal Equator: horse latitude, ITCZ, Heat equator

thermal equator

[′thər·məl i′kwād·ər]
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Thermal Equator


(also heat equator), the parallel of latitude having the highest mean air temperature at the earth’s surface over a period of many years. In January the thermal equator coincides with the geographic equator; the mean air temperature here for January is approximately 26°C. In July the thermal equator shifts to 20°–25° N lat., where the mean air temperature is approximately 28°C. The mean annual position of the thermal equator is near 10° N lat. The thermal equator shifts northward from the geographic equator because the tropical regions of the northern hemisphere have a larger land area than those of the southern hemisphere and land is more strongly heated than ocean water.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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