EESA09H3 Lecture 6: Lecture 6
19 Jan 2012
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Document Summary
Part iv research: long range transport of saharan dust. Poleward of the polar front, the division between cold, polar air and warm, tropical air, storms can form. Sometimes, due to some similarities to hurricanes, they have been called polar hurricanes or arctic hurricanes. Polar lows form when bitterly cold arctic air, which forms over sea ice or. 1. 2 how do they form? continental land surface, moves over to much warmer ocean water. This substantial change in surface properties is sometimes referred to as the arctic front. The contrast in temperature between the air mass and the ocean surface beneath is quite large. By tropical standards, the polar ocean is quite cold, perhaps only a few degrees above freezing. Nevertheless, the ocean waters can be 20 to 40oc warmer than the arctic air mass, a stronger temperature difference than experienced by tropical cyclones.
