DOI: 10.1007/s00382-014-2136-2
Scopus记录号: 2-s2.0-84939893683
论文题名: Zonal structure and seasonal variability of the Atlantic Equatorial Undercurrent
作者: Johns W.E. ; Brandt P. ; Bourlès B. ; Tantet A. ; Papapostolou A. ; Houk A.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 43, 期: 11 起始页码: 3047
结束页码: 3069
语种: 英语
英文摘要: Simultaneous mooring arrays were maintained along the path of the Equatorial Undercurrent (EUC) at three longitudes (23°W, 10°W, and 0°E), from October 2007 to June 2011, as part of the CLIVAR Tropical Atlantic Climate Experiment. The measurements allow for the first time a description of the seasonal cycle and interannual variability of the EUC across the Atlantic basin. The mean transport of the EUC at 23°W is 14.3 ± 0.6 Sv, decreasing to 12.1 ± 0.9 and 9.4 ± 0.6 Sv at 10°W and 0°E, respectively. The EUC shows a changing seasonal cycle across the basin: at 23°W, the strongest EUC transport occurs in boreal fall in association with maximum easterly wind stress, at 10°W the EUC transport shows a semiannual cycle with a maximum in boreal spring and fall, while at 0°E the EUC has a single spring maximum. At all locations the EUC core exhibits a similar seasonal vertical migration, with shallowest core depths occurring in boreal spring and deepest core depths in boreal fall. The maximum core intensity occurs in boreal spring all across the basin, when the EUC is shallow, during the annual wind relaxation. The weakest EUC core intensity occurs during the boreal summer cold tongue phase, especially in the eastern part of the basin. At both 23°W and 10°W, a deep extension of the EUC occurs in boreal summer, which increases the transport in the lower thermocline and partially offsets the weaker upper EUC transport during boreal summer. No clear linkage could be established between the interannual variability of the EUC in the eastern part of the basin and the intensity of the summer cold tongue, despite evidence for such a linkage in the western part of the basin. © 2014, Springer-Verlag Berlin Heidelberg. 资助项目: BMBF, Bundesministerium für Bildung und Forschung
; DFG, Bundesministerium für Bildung und Forschung
; NSF, Bundesministerium für Bildung und Forschung
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54648
Appears in Collections: 过去全球变化的重建
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作者单位: Division of Meteorology and Physical Oceanography, Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL, United States; GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, Germany; IRD/LEGOS, Brest, France; Institute for Marine and Atmospheric Research, Utrecht University, Utrecht, Netherlands
Recommended Citation:
Johns W.E.,Brandt P.,Bourlès B.,et al. Zonal structure and seasonal variability of the Atlantic Equatorial Undercurrent[J]. Climate Dynamics,2014-01-01,43(11)