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Category: Arctic

Cold air builds in Alaska

Very cold air was becoming established across the interior of Alaska during the last few days of December 2008. AWIPS images of the 4-km resolution GOES-11 10.7 µm IR channel (above) showed large areas exhibiting very cold IR brightness temperatures (colder than -40º C, darker blue color enhancement) which were... Read More

Cold temperatures in Alaska

A NOAA-16 AVHRR 11.0 µm IR image (above) showed cold brightness temperatures of -10º to -20º C (violet colors) across much of northwestern Alaska on 30 September 2008. The coldest IR brightness temperatures of around -27º C or -17º F (darker blue colors) corresponded to the higher elevations of the... Read More