Shelfwater Response to the Cold Winters of 1977 and 1978 in the South Atlantic Bight (SAB)

Hydrographie data from winter and summer cruises during the 1976 to 1979 period were used to illustrate atypical oceanographie conditions in the SAB, especially during the cold winters of 1977 and 1978. During this period meteorological conditions resulted in unusually low water temperatures in near...

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Veröffentlicht in:Litoralia. - Van Nostrand Reihold Company Inc., 1984. - 1(1984), 1, Seite 41-58
1. Verfasser: Mathews, Thomas D. (VerfasserIn)
Weitere Verfasser: Pashuk, Oleg
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 1984
Zugriff auf das übergeordnete Werk:Litoralia
Schlagworte:Physical sciences Applied sciences Environmental studies
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520 |a Hydrographie data from winter and summer cruises during the 1976 to 1979 period were used to illustrate atypical oceanographie conditions in the SAB, especially during the cold winters of 1977 and 1978. During this period meteorological conditions resulted in unusually low water temperatures in nearshore regimes (< 6°C in South Carolina coastal waters in January 1977). During other winter cruises surface waters were cooler off Georgia than off South Carolina. Zones of upwelling were observed regularly near Cape Canaveral and off Charleston, while Gulf Stream intrusions were detected at many outer shelf locations. Salinities indicative of runoff occurred near the coast, from South Carolina to Florida during the winter cruises. High salinities (> 36 0/00) were also measured during the winter cruises in some coastal areas, indicating Gulf Stream intrusions. Surface salinities > 35 0/00 near river mouths were observed during the summers of 1977 and 1978, correlating well with drought conditions in the coastal states. Surface circulation, as derived from density distributions, was atypical throughout much of the period of this study. The cyclonic eddynormaliyin Long Bay (south of Cape Fear) was not well-defined or present during the summer cruises, but was quite distinct during winter 1977 in conjunction with three other cyclonic eddies at midshelf locations. In addition, a rather continuous coastal countercurrent was present during winter 1977 from Long Bay to Cape Canaveral. The summer 1976 circulation, however, did not have a Long Bay eddy as usual or it was displaced offshore. 
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