DOI: 10.1029/2018JC013815
Scopus记录号: 2-s2.0-85052484613
论文题名: South Atlantic Subtropical Gyre Late Twentieth Century Changes
作者: Marcello F. ; Wainer I. ; Rodrigues R.R.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 8 起始页码: 5194
结束页码: 5209
语种: 英语
英文关键词: Atlantic Meridional Overturning Circulation
; South Atlantic Ocean
; South Equatorial Current bifurcation
; subtropical gyre circulation
英文摘要: This study builds upon existing research suggesting recent changes in the circulation of global subtropical gyres with respect to the South Atlantic Ocean using simulation results from the ocean component of the Community Earth System Model version 1—the Parallel Ocean Program version 2. The results point to an intensification of the total anticyclonic circulation of the subtropical gyre and a southward displacement of the system, as revealed by the wind stress curl, sea surface height, and barotropic stream function fields. Increased values of these variables were found within the dynamical limits of the South Atlantic Subtropical Gyre (SASG), while their basin-scale structure seemed to be concurrently drifting poleward. The southern branch of the South Equatorial Current (sSEC) marks the northern boundary of the SASG. When reaching the South American coast, it bifurcates into the North Brazil Undercurrent to the north and the Brazil Current to the south. The sSEC bifurcation latitude (SBL) dictates the partition between the waters flowing poleward to recirculate within the SASG and those flowing toward the equatorial region and the Northern Hemisphere. A southward migration of the SBL at a rate of −0.11°± 0.03°/year was observed, associated with a substantial increase in the equatorward advection of waters within the sSEC-SBL-North Brazil Undercurrent system. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113364
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Physical Oceanography, Oceanographic Institute of the University of São Paulo, São Paulo, SP, Brazil; Department of Geosciences, Federal University of Santa Catarina, Florianópolis, SC, Brazil
Recommended Citation:
Marcello F.,Wainer I.,Rodrigues R.R.. South Atlantic Subtropical Gyre Late Twentieth Century Changes[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(8)