Subpolar Low-Pressure Belt

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subpolar low-pressure belt [¦səb′pō·lər ¦lō ′presh·ər ‚belt]

(meteorology)

A belt of low pressure located, in the mean, between 50 and 70° latitude; in the Northern Hemisphere, this belt consists of the Aleutian low and the Icelandic low; in the Southern Hemisphere, it is supposed to exist around the periphery of the Antarctic continent.

an area of low atmospheric pressure in the subpolar regions of the northern and southern hemispheres. Subpolar low-pressure belts are mainly encountered above oceans, usually in the regions between 50° and 70° N and S lat. On long-term mean climatic maps, the subpolar low-pressure belts of the northern hemisphere are grouped into two centers of atmospheric activity: the Iceland low and the Aleutian depression (Aleutian low). Such belts in the southern hemisphere surround Antarctica and are not as well differentiated. Subpolar low-pressure belts are characterized by the frequent occurrence of deep cyclones.

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