DOI: 10.1007/s00382-016-3322-1
Scopus记录号: 2-s2.0-84983386539
论文题名: Interannual variability of Indian Ocean subtropical mode water subduction rate
作者: Ma J. ; Lan J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2017
卷: 48, 期: 2017-11-12 起始页码: 4093
结束页码: 4107
语种: 英语
英文关键词: Mixed layer depth
; Southwest Indian Ocean
; Subduction rate
; Subtropical mode water
英文摘要: The interannual variation of Indian Ocean subtropical mode water (IOSTMW) subduction rate in the Southwest Indian Ocean from 1980 to 2007 is investigated in this paper based on Simple Ocean Data Assimilation (SODA) outputs. Climatology of subduction rate exceeds 75 m/year in the IOSTMW formation area. The renewal time of permanent pycnocline water mass based on the subduction rate is calculated for each density class: 3–6 years for IOSTMW (25.8 < σθ < 26.2 kg m−3). Subduction rate in the Southwest Indian Ocean subtropical gyre exhibits a great year-to-year variability. This interannual variations of the IOSTMW subduction rate is primarily dominated by the lateral induction term, associated with the interannual variations of strong meridional gradient of winter mixed layer depth (MLD). The slope of the mixed layer depth in the mode water is closely linked to the large variations of deep late winter MLD in the mid-latitudes and negligible variations of shallow winter MLD in lower latitudes. It is further identified that the interannual variation of late winter MLD in this area is largely controlled by the latent and sensible heat flux components. The water volume of the permanent pycnocline in the IOSTMW distribution area is also found to show a significant interannual variability, and it is well correlated with the interannual variation of subduction rate. © 2016, Springer-Verlag Berlin Heidelberg. 资助项目: NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53225
Appears in Collections: 过去全球变化的重建
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作者单位: Physical Oceanography Laboratory/CIMST, Ocean University of China, Qingdao, China; College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao, China
Recommended Citation:
Ma J.,Lan J.. Interannual variability of Indian Ocean subtropical mode water subduction rate[J]. Climate Dynamics,2017-01-01,48(2017-11-12)