DOI: 10.1175/JCLI-D-12-00120.1
Scopus记录号: 2-s2.0-84878968248
论文题名: The mean and the time variability of the shallow meridional overturning circulation in the tropical south pacific ocean
作者: Zilberman N.V. ; Roemmich D.H. ; Gille S.T.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 12 起始页码: 4069
结束页码: 4087
语种: 英语
Scopus关键词: Atmosphere-ocean interactions
; ENSO
; Mass fluxes/transport
; Meridional overturning circulations
; Ocean circulation
; Atmospheric pressure
; Cells
; Cytology
; Heat transfer
; Heating
; Hydrographic surveys
; Oceanography
; Tropics
; Atmospheric movements
; air-sea interaction
; Ekman transport
; El Nino-Southern Oscillation
; geostrophic flow
; heat budget
; heating
; La Nina
; mass transport
; meridional circulation
; oceanic circulation
; overturn
; salinity
; sea surface temperature
; surface wind
; throughflow
; Pacific Ocean
; Pacific Ocean (Subtropical)
英文摘要: The meridional transport in the Pacific Ocean subtropical cell is studied for the period from 2004 to 2011 using gridded Argo temperature and salinity profiles and atmospheric reanalysis surface winds. The poleward Ekman and equatorward geostrophic branches of the subtropical cell exhibit an El Niño-Southern Oscillation signature with strong meridional transport occurring during La Niña and weak meridional transport during El Niño. At 7.58°, mean basinwide geostrophic transport above 1000 dbar is 48.5±62.5 Sv (Sv≡ 106 m3 s-1) of which 30.3-38.4 Sv return to the subtropics in the surface Ekman layer, whereas 10.2-18.3 Sv flow northward, feeding the Indonesian Throughflow. Geostrophic transport within the subtropical cell is stronger in the ocean interior and weaker in the western boundary during LaNiña, with changes in the interior dominating basinwide transport. Using atmospheric reanalyses, only half of the mean heat gain by the Pacific north of 7.58°is compensated by oceanic heat transport out of the region. The National Oceanography Centre at Southampton air-sea flux climatology is more consistent for closing the oceanic heat budget. In summary, the use of Argo data for studying the Pacific subtropical cell provides an improved estimate of basinwide mean geostrophic transport, includes both interior and western boundary contributions, quantifies El Niño/La Niña transport variability, and illustrates how the meridional overturning cell dominates ocean heat transport at 7.58 °. © 2013 American Meteorological Society. 资助项目: NOAA, National Oceanic and Atmospheric Administration
; NASA, National Aeronautics and Space Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51837
Appears in Collections: 气候变化事实与影响
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作者单位: Scripps Institution of Oceanography, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0230, United States
Recommended Citation:
Zilberman N.V.,Roemmich D.H.,Gille S.T.. The mean and the time variability of the shallow meridional overturning circulation in the tropical south pacific ocean[J]. Journal of Climate,2013-01-01,26(12)