DOI: 10.1175/JCLI-D-18-0116.1
Scopus记录号: 2-s2.0-85053067803
论文题名: Multidecadal changes of the upper Indian ocean heat content during 1965-2016
作者: Li Y. ; Han W. ; Hu A. ; Meehl G.A. ; Wang F.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 19 起始页码: 7863
结束页码: 7884
语种: 英语
英文关键词: Indian ocean
; Multidecadal variability
; Ocean circulation
; Pacific decadal oscillation
; Wind stress
Scopus关键词: Enthalpy
; Greenhouse gases
; Heat flux
; Heat transfer
; Wind stress
; Indian ocean
; Meridional heat transports
; Multidecadal variability
; Multidecadal variations
; Ocean circulation
; Ocean general circulation models
; Pacific decadal oscillation
; Western boundary currents
; Oceanography
英文摘要: Ocean heat uptake is the primary heat sink of the globe and modulates its surface warming rate. In situ observations during the past half century documented obvious multidecadal variations in the upper-ocean heat content (0-400 m; OHC400) of the Indian Ocean (IO). The observed OHC400 showed an increase of (5.9 ± 2.5) × 1021 J decade-1 during 1965-79, followed by a decrease of (-5.2 ± 2.5) × 1021 J decade-1 during 1980-96, and a rapid increase of (13.6 ± 1.1) × 1021 J decade-1 during 2000-14. These variations are faithfully reproduced by an Indo-Pacific simulation of an ocean general circulation model (OGCM), and insights into the underlying mechanisms are gained through OGCM experiments. The Pacific wind forcing through the Indonesian Throughflow (ITF) was the leading driver of the basin-integrated OHC400 increase during 1965-79 and the decrease during 1980-96, whereas after 2000 local wind and heat flux forcing within the IO made a larger contribution. The ITF heat transport is primarily dictated by Pacific trade winds. It directly affects the south IO, after which the signatures can enter the north IO through the meridional heat transport of the western boundary current. The prevailing warming of the western-to-central IO for 2000-14 was largely induced by equatorial easterly wind trends, Ekman downwelling off the equator, and northeasterly wind trends over the west Asia-East Africa coastal region. The increasing downward longwave radiation, probably reflecting anthropogenic greenhouse gas forcing, overcame the decreasing surface shortwave radiation and also made a significant contribution to the rapid upper-IO warming after 2000. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110675
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Department of Atmospheric and Oceanic Sciences, University of Colorado Boulder, Boulder, CO, United States; Function Laboratory for Ocean Dynamics and Climate, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; National Center for Atmospheric Research, Boulder, CO, United States; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China
Recommended Citation:
Li Y.,Han W.,Hu A.,et al. Multidecadal changes of the upper Indian ocean heat content during 1965-2016[J]. Journal of Climate,2018-01-01,31(19)