DOI: 10.1007/s00382-014-2243-0
Scopus记录号: 2-s2.0-84939878558
论文题名: Interannual variability of the Arabian Sea Warm Pool: observations and governing mechanisms
作者: Rao R.R. ; Jitendra V. ; GirishKumar M.S. ; Ravichandran M. ; Ramakrishna S.S.V.S.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 44, 期: 2017-07-08 起始页码: 2119
结束页码: 2136
语种: 英语
英文关键词: Arabian Sea Warm Pool
; Dynamic pre-conditioning
; El Nino and La Nina
; Haline pre-conditioning
; Interannual variability
; Surface net heat flux
; Thermal pre-conditioning
英文摘要: The near-surface layers in the Arabian Sea progressively warm up from February to early May resulting in the formation of pool of warm waters popularly known as the Arabian Sea Warm Pool (ASWP). The availability of high quality TMI sea surface temperature (SST) data for the years 1998–2010 is exploited to describe the evolution of the ASWP on seasonal and interannual time scales and to explain the associated mechanisms. The multi-year (1998–2010) averaged TMI SSTs during April–May show peak values of the ASWP in excess of 30 °C with its core >30.5 °C extending offshore as a well-marked southwestward tongue stretching from the southwest coast of India. The ASWP shows both seasonal and interannual variability in the evolution of spatio-temporal characteristics such as amplitude, phase and spatial extent. Among these 13 years, the ASWP was most (least) pronounced during 1998, 2003 and 2010 (1999, 2000, 2001 and 2008). The mechanisms that govern the observed interannual variability of the ASWP are examined addressing the most relevant issues such as—(1) dynamic pre-conditioning: background pycnocline topography influenced by the westward propagating Rossby waves during October–May, (2) thermal pre-conditioning: background SST/heat content signal during October–January influenced by the strength of the preceding year’s summer monsoon and the post-monsoon cyclones during October–December, (3) haline pre-conditioning: near-surface vertical salinity stratification during November–February influenced by the advection of low saline waters from the Bay of Bengal, (4) influence of surface net heat flux forcing during February–May, and (5) influence of El Nino/La Nina. © 2014, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54176
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Meteorology and Oceanography, Andhra University, Visakhapatnam, India; Indian National Centre for Ocean Information Services, Hyderabad, India
Recommended Citation:
Rao R.R.,Jitendra V.,GirishKumar M.S.,et al. Interannual variability of the Arabian Sea Warm Pool: observations and governing mechanisms[J]. Climate Dynamics,2015-01-01,44(2017-07-08)