DOI: 10.1007/s00382-016-3359-1
Scopus记录号: 2-s2.0-84988700672
论文题名: Ocean atmosphere thermal decoupling in the eastern equatorial Indian ocean
作者: Joseph S. ; Ravichandran M. ; Kumar B.P. ; Jampana R.V. ; Han W.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2017
卷: 49, 期: 2017-01-02 起始页码: 575
结束页码: 594
语种: 英语
英文关键词: Air-temperature
; Indian ocean
; SST
; Thermal coupling
英文摘要: Eastern equatorial Indian ocean (EEIO) is one of the most climatically sensitive regions in the global ocean, which plays a vital role in modulating Indian ocean dipole (IOD) and El Niño southern oscillation (ENSO). Here we present evidences for a paradoxical and perpetual lower co-variability between sea-surface temperature (SST) and air-temperature (Tair) indicating instantaneous thermal decoupling in the same region, where signals of the strongly coupled variability of SST anomalies and zonal winds associated with IOD originate at inter-annual time scale. The correlation minimum between anomalies of Tair and SST occurs in the eastern equatorial Indian ocean warm pool region (≈70°E–100°E, 5°S–5°N), associated with lower wind speeds and lower sensible heat fluxes. At sub-monthly and Madden–Julian oscillation time scales, correlation of both variables becomes very low. In above frequencies, precipitation positively contributes to the low correlation by dropping Tair considerably while leaving SST without any substantial instant impact. Precipitation is led by positive build up of SST and post-facto drop in it. The strong semi-annual response of SST to mixed layer variability and equatorial waves, with the absence of the same in the Tair, contributes further to the weak correlation at the sub-annual scale. The limited correlation found in the EEIO is mainly related to the annual warming of the region and ENSO which is hard to segregate from the impacts of IOD. © 2016, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53151
Appears in Collections: 过去全球变化的重建
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作者单位: Indian National Centre for Ocean Information Services, Ocean Valley, Pragathi Nagar, Hyderabad, India; Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, CO, United States
Recommended Citation:
Joseph S.,Ravichandran M.,Kumar B.P.,et al. Ocean atmosphere thermal decoupling in the eastern equatorial Indian ocean[J]. Climate Dynamics,2017-01-01,49(2017-01-02)