DOI: 10.1175/JCLI-D-16-0130.1
Scopus记录号: 2-s2.0-85000893400
论文题名: Interhemispheric SST gradient trends in the Indian ocean prior to and during the recent global warming hiatus
作者: Dong L. ; McPhaden M.J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 24 起始页码: 9077
结束页码: 9095
语种: 英语
Scopus关键词: Advection
; Atmospheric temperature
; Global warming
; Greenhouse gases
; Heat flux
; Stream flow
; Submarine geophysics
; Surface properties
; Surface waters
; Temperature distribution
; Wind stress
; Air sea interactions
; Decadal variability
; Greenhouse-gas forcing
; Indian ocean
; Indonesian throughflow
; Northern indian oceans
; Sea surface temperature (SST)
; Sea surface temperatures
; Oceanography
英文摘要: Sea surface temperatures (SSTs) have been rising for decades in the Indian Ocean in response to greenhouse gas forcing. However, this study shows that during the recent hiatus in global warming, a striking interhemispheric gradient in Indian Ocean SST trends developed around 2000, with relatively weak or little warming to the north of 10°S and accelerated warming to the south of 10°S. Evidence is presented from a wide variety of data sources showing that this interhemispheric gradient in SST trends is forced primarily by an increase of Indonesian Throughflow (ITF) transport from the Pacific into the Indian Ocean induced by stronger Pacific trade winds. This increased transport led to a depression of the thermocline that facilitated SST warming, presumably through a reduction in the vertical turbulent transport of heat in the southern Indian Ocean. Surface wind changes in the Indian Ocean linked to the enhanced Walker circulation also may have contributed to thermocline depth variations and associated SST changes, with downwelling-favorable wind stress curls between 10° and 20°S and upwelling-favorable wind stress curls between the equator and 10°S. In addition, the anomalous southwesterly wind stresses off the coast of Somalia favored intensified coastal upwelling and offshore advection of upwelled water, which would have led to reduced warming of the northern Indian Ocean. Although highly uncertain, lateral heat advection associated with the ITF and surface heat fluxes may also have played a role in forming the interhemispheric SST gradient change. © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50062
Appears in Collections: 气候变化事实与影响
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作者单位: NOAA/Pacific Marine Environmental Laboratory, Seattle, WA, United States
Recommended Citation:
Dong L.,McPhaden M.J.. Interhemispheric SST gradient trends in the Indian ocean prior to and during the recent global warming hiatus[J]. Journal of Climate,2016-01-01,29(24)