Here's a global picture to help usher in the new year. This image shows daytime land surface temperatures as observed by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Terra satellite in Nov 2007.
The land surface temperature image shows how the indirectness of sunlight at high latitudes affects temperature. The coldest areas, colored blue and white, lie to the north and south, while the warmest areas, yellow and red, lie on or near the Equator.
Arcs of cold blue appear in warm areas in Asia, Europe, and Africa. These contrasting cold areas indicate mountain ranges. Higher elevations have cooler temperatures than lower elevations because of adiabatic heating. When air moves up to higher elevations, it expands, owing to lower pressure. As the air expands, its temperature drops.
The land surface temperature image shows how the indirectness of sunlight at high latitudes affects temperature. The coldest areas, colored blue and white, lie to the north and south, while the warmest areas, yellow and red, lie on or near the Equator.
Arcs of cold blue appear in warm areas in Asia, Europe, and Africa. These contrasting cold areas indicate mountain ranges. Higher elevations have cooler temperatures than lower elevations because of adiabatic heating. When air moves up to higher elevations, it expands, owing to lower pressure. As the air expands, its temperature drops.
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