Summer/winter stratification variability in the central part of the South Brazil Bight

被引:58
作者
Castro, Belmiro M. [1 ]
机构
[1] Univ Sao Paulo, Oceanog Inst, BR-05508120 Sao Paulo, Brazil
关键词
South Brazil Bight; Stratification; Hydrography; South Atlantic Central Water; Summer/winter variability; Physical processes; SOUTHEASTERN UNITED-STATES; CONTINENTAL-SHELF; RIVER DISCHARGE; SEA; ATLANTIC; AMERICA; FRONTS; WINDS; CYCLE; FATE;
D O I
10.1016/j.csr.2013.12.002
中图分类号
P7 [海洋学];
学科分类号
0707 ;
摘要
Analysis of the hydrographic data collected during seven consecutive high resolution summer/winter cruises in the central part of the South Brazil Bight off the coastal city of Ubatuba confirmed an observable summer/winter stratification variability of the shelf waters. The maximum bulk stratification occurred at mean distances of 85.6 km and 39.1 km from the coast in the austral winter and summer cruises, respectively. Estimates of the equivalent mixing power of the physical processes that increase or decrease the stratification in the inner and middle shelves showed that both shelf regions would be vertically well mixed were it not for buoyancy advection. In the inner shelf, buoyancy advection was associated with the along-shelf transport of low salinity waters originating from river runoff. In the middle shelf, buoyancy advection was due to the oceanic South Atlantic Central Water intrusions toward the coast. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码:15 / 23
页数:9
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