DOI: 10.1007/s00382-013-1968-5
Scopus记录号: 2-s2.0-84886441022
论文题名: Mean meridional currents in the central and eastern equatorial Atlantic
作者: Perez R.C. ; Hormann V. ; Lumpkin R. ; Brandt P. ; Johns W.E. ; Hernandez F. ; Schmid C. ; Bourlès B.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2013
卷: 43, 期: 11 起始页码: 2943
结束页码: 2962
语种: 英语
英文关键词: Meridional currents
; Tropical Atlantic
; Tropical cells
英文摘要: Ship-based acoustic Doppler current profiler (ADCP) velocity measurements collected by several major field programs in the tropical Atlantic are averaged and combined with estimates of the mean near-surface velocity derived from drifters and Argo float surface drifts (ADCP+D) to describe the mean cross-equatorial and vertical structure of the meridional currents along 23°W and 10°W. Data from moored ADCPs and fixed-depth current meters, a satellite-derived velocity product, and a global ocean reanalysis were additionally used to evaluate the mean ADCP+D meridional velocity. The dominant circulation features in the long-term mean ADCP+D meridional velocity in the upper 100 m are the tropical cells (TCs) located approximately between 5°S and 5°N, with near-surface poleward flow and subsurface equatorward flow that is stronger and shallower in the northern cell compared to the southern cell. The thickness of the surface limb of the TCs decreases and the northern cell is found to shift further south of the equator from the central to eastern tropical Atlantic. Analysis of two-season means estimated from the ship-based ADCP, near-surface drift, and moored velocity data, as well as the simulated fields, indicates that the maximum poleward velocity in the surface limb of the TCs intensifies during December–May along 23°W largely due to seasonal compensation between the geostrophic and ageostrophic (or wind-driven) components of the meridional velocity, whereas the maximum equatorward flow in the subsurface limb of the northern cell intensifies during June–November along both 23°W and 10°W due to the seasonality of the geostrophic meridional velocity. © 2013, Springer-Verlag Berlin Heidelberg. 资助项目: BMBF, Bundesministerium für Bildung und Forschung
; NOAA, National Oceanic and Atmospheric Administration
; DFG, Deutsche Forschungsgemeinschaft
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55075
Appears in Collections: 过去全球变化的重建
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作者单位: Cooperative Institute for Marine and Atmospheric Studies, University of Miami, 4600 Rickenbacker Causeway, Miami, FL, United States; NOAA Atlantic Oceanographic and Meteorological Laboratory, Miami, FL, United States; Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States; GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, Germany; Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, United States; Institut de Recherche pour le Développement, Mercator-Océan, Toulouse, France; Institut de Recherche pour le Développement, LEGOS, Brest, France
Recommended Citation:
Perez R.C.,Hormann V.,Lumpkin R.,et al. Mean meridional currents in the central and eastern equatorial Atlantic[J]. Climate Dynamics,2013-01-01,43(11)