. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder. Oceanography Bering 164° 160° I56°W Figure 2-7. Barry's (1978) dominant winter Type 1 sea-level pressure weather pattern. and bring warm air with larger amounts of cloudiness. Barry states that in summer there is a great variety of types, with both cyclonic and anticyclonic types apparent. Type 3 (Fig. 2-8) is the most common in July and is closest to the mean monthly SLP charts for summer given by Brower et al. (1977); one interpretation is that atmospheric circulation in the south
. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder. Oceanography Bering 164° 160° I56°W Figure 2-7. Barry's (1978) dominant winter Type 1 sea-level pressure weather pattern. and bring warm air with larger amounts of cloudiness. Barry states that in summer there is a great variety of types, with both cyclonic and anticyclonic types apparent. Type 3 (Fig. 2-8) is the most common in July and is closest to the mean monthly SLP charts for summer given by Brower et al. (1977); one interpretation is that atmospheric circulation in the southern Bering Sea can be more readily charac- terized by mean storm tracks or the presence of low-pressure centers in certain sectors of the region than by static weather types. Fig. 2-9 plots the average number of low-pressure centers observed in a 10° X 10° latitude-longitude area during the nine-year period of record 1966-74. These areas are NW (60°-70°N, 170°-180°W), NE (60°-70°N, 160°- 170°W), SW (50°-60°N, 170°-180°W), and SE (50°-60°N, 160°-170°W). It is apparent that southern sectors have two to three times more storms than the northern sectors. However, the monthly variability is high, suggesting that the period of record is too short to make comparisons between months. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 6 I - - I 1 . ..-4- (>. ''%. ^ 1 >-^^^ 1966-1974 MEAN NUMBER OF LOW CENTERS OBSERVED WITHIN 60°-70°N and 170°-|80°W 1966-1974 MEAN NUMBER OF LOW CENTERS OBSERVED WITHIN 60°-70°N and I60°-|70°W 1966-1974 MEAN NUMBER OF LOW CENTERS OBSERVED WITHIN 50°-60°N and I70''-I80''W 1966-1974 MEAN NUMBER OF LOW CENTERS OBSERVED WITHIN 50°-60°N and I60''-I70°W 64° N ~? Chukolsk \ Bering ^ ^->-Peninsulaj^5/Aa///>^g„g^j Peninsula. 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
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