globalchange  > 过去全球变化的重建
DOI: 10.1007/s00382-014-2059-y
Scopus记录号: 2-s2.0-84893735938
论文题名:
Processes of interannual mixed layer temperature variability in the thermocline ridge of the Indian Ocean
作者: Praveen Kumar B.; Vialard J.; Lengaigne M.; Murty V.S.N.; Foltz G.R.; McPhaden M.J.; Pous S.; de Boyer Montégut C.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 43, 期:2017-09-10
起始页码: 2377
结束页码: 2397
语种: 英语
英文关键词: ENSO ; IOD ; Surface temperature interannual variability ; Thermocline ridge of the Indian Ocean
英文摘要: Sea-surface temperature interannual anomalies (SSTAs) in the thermocline ridge of the southwestern tropical Indian Ocean (TRIO) have several well-documented climate impacts. In this paper, we explore the physical processes responsible for SSTA evolution in the TRIO region using a combination of observational estimates and model-derived surface layer heat budget analyses. Vertical oceanic processes contribute most to SSTA variance from December to June, while lateral advection dominates from July to November. Atmospheric fluxes generally damp SSTA generation in the TRIO region. As a result of the phase opposition between the seasonal cycle of vertical processes and lateral advection, there is no obvious peak in SSTA amplitude in boreal winter, as previously noted for heat content anomalies. Positive Indian Ocean Dipole (IOD) events and the remote influence of El Niño induce comparable warming over the TRIO region, though IOD signals peak earlier (November–December) than those associated with El Niño (around March–May). Mechanisms controlling the SSTA growth in the TRIO region induced by these two climate modes differ strongly. While SSTA growth for the IOD mostly results from southward advection of warmer water, increased surface shortwave flux dominates the El Niño SSTA growth. In both cases, vertical oceanic processes do not contribute strongly to the initial SSTA growth, but rather maintain the SSTA by opposing the effect of atmospheric negative feedbacks during the decaying phase. © 2014, Springer-Verlag Berlin Heidelberg.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54374
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, Ministry of Earth Sciences, Govt. of India, Hyderabad, India; Laboratoire d’Océanographie Expérimentation et Approches Numériques, CNRS, UPMC, IRD, MNHN, Paris, France; CSIR-National Institute of Oceanography, Regional Centre, Vishakhapatnam, India; Atlantic Oceanographic and Meteorological Laboratory, NOAA, Miami, FL, United States; Pacific Marine Environmental Laboratory, NOAA, Seattle, WA, United States; LMI ICEMASA, IRD, Department of Oceanography, University of Cape Town, Cape Town, South Africa; IFREMER, Centre de Brest, Laboratoire d’Océanographie Spatiale, Pointe du Diable, B.P. 70, Plouzane, France

Recommended Citation:
Praveen Kumar B.,Vialard J.,Lengaigne M.,et al. Processes of interannual mixed layer temperature variability in the thermocline ridge of the Indian Ocean[J]. Climate Dynamics,2014-01-01,43(2017-09-10)
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