. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder . 160° I56°W Figure 2-8. A frequently occurring summer weather type, from Barry (1978). Figure 2-9. Frequency of low-pressure systems by month for the northern and southern Bering Sea. CLOUD STREETS The advection of cold air southward from the north and northeast Bering Sea in winter produces ideal conditions for convective cloud development over the relatively warm waters to the south. The air is virtually unimpeded as it flows south across the ice, and the ice edge forms a sharp line of
. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder . 160° I56°W Figure 2-8. A frequently occurring summer weather type, from Barry (1978). Figure 2-9. Frequency of low-pressure systems by month for the northern and southern Bering Sea. CLOUD STREETS The advection of cold air southward from the north and northeast Bering Sea in winter produces ideal conditions for convective cloud development over the relatively warm waters to the south. The air is virtually unimpeded as it flows south across the ice, and the ice edge forms a sharp line of demarcation where sea temperatures can be as much as 15 C warmer than the air. As the air continues to flow south it is progressively destabilized by the upward transfer of heat and moisture from the ocean. The most frequently observed patterns are of the type displayed in Fig. 2-10, which shows uniform cloud streets at intervals averaging 5-6 km forming 20-70 km to the south of the ice edge and aligned in the direction of the surface wind (Streten 1975). They extend some 200-300 km downstream, display- ing only a smaU increase in cloud element dimensions.
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