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The Freat Arctic Cyclone of 2012

Anonymous Coward
User ID: 21632597
08/10/2012 09:53 AM
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The Freat Arctic Cyclone of 2012
Two smaller systems merged on August 5 to form the storm, which at the time occupied much of the Beaufort-Chukchi Sea and Canadian Basin. On average, Arctic cyclones last about 40 hours; as of August 9, 2012, this storm had lasted more than five days. An unusually strong area of low pressure moved northward into the Arctic Ocean and intensified during the 05 August 08 August 2012 time period a storm this deep (965 hPa central pressure) is exceptional for the Arctic Ocean region, especially during the summer month of August.

The storm was moving poleward during the 05 August 08 August time period. Barrow, Alaska was in the warm sector of the storm on 05 August, and recorded a daily high temperature of 15,5ºC or 60º F (with a peak wind gust from the southwest at 66 km/h or 41 mph). Two days later, strong cold air advection in the wake of the storm (with a peak westerly wind gust of 53 km/h or 33 mph) kept the daily high temperature at Barrow down to 3,8ºC or 39º F according to CIMSS satellite blog.

This storm formed and intensified near the Beaufort Sea and moved to the central Arctic Ocean where it will slowly lose its intensity over the next several days. Ordinarily, the Beaufort Sea and the Arctic Ocean are dominated by high pressure, so having a low pressure system form and intensify here is quite uncommon. Although, it has been happening with more frequency over the past few decades as pressures have dropped significantly in the Arctic during this time and are projected to drop even more during the next century by the global climate models.

[link to thewatchers.adorraeli.com]
Anonymous Coward
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08/10/2012 04:41 PM
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Re: The Freat Arctic Cyclone of 2012
bump for more info