. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder . 63 64 65 66 67 68 70 71 YEARS 72 73 74 75 76 77 78 Figure 9-3. Mean annual sea surface temperatures from the area of the Pribilof Islands and Bristol Bay and shelf bottom water temperatures (Coachman and Charnell 1979) for June for the Bering Sea (after Niebauer 1980). northerly flow). In fact, for the period 1974-76 there were only five months in which there was monthly mean southerly flow and these were all summer months. The second period (~ 1976-79) is characterized by a strong
. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder . 63 64 65 66 67 68 70 71 YEARS 72 73 74 75 76 77 78 Figure 9-3. Mean annual sea surface temperatures from the area of the Pribilof Islands and Bristol Bay and shelf bottom water temperatures (Coachman and Charnell 1979) for June for the Bering Sea (after Niebauer 1980). northerly flow). In fact, for the period 1974-76 there were only five months in which there was monthly mean southerly flow and these were all summer months. The second period (~ 1976-79) is characterized by a strong rise in SST (~1 C/yr) and a precipitous fall (~9-10 percent/yr) in ice (Niebauer 1980). These observations coincide and are probably a result of the abrupt swing of the upper air flow from northerly to southerly as reported by Niebauer (Chapter 3, this volume; 1980). Illustrated in Fig. 9-5 is an example of the strong flow from the south which probably caused the extreme below-normal (~35 percent below normal) ice extent in January 1979. This strong southerly flow persisted for most of the 1978-79 winter, resulting in over 40 percent below
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