DOI: 10.1175/JCLI-D-11-00637.1
Scopus记录号: 2-s2.0-84870039716
论文题名: The Indian monsoon circulation response to El Niño diabatic heating
作者: Jang Y. ; Straus D.M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 21 起始页码: 7487
结束页码: 7508
语种: 英语
Scopus关键词: Atmosphere-ocean interactions
; Atmospheric circulation
; Diabatic heating
; EL Nino
; ENSO
; Atmospheric temperature
; Atmospheric thermodynamics
; Climatology
; Experiments
; Nickel compounds
; Oceanography
; Heating
; air-sea interaction
; anticyclone
; atmosphere-ocean coupling
; atmospheric circulation
; atmospheric general circulation model
; boundary condition
; diabatic process
; El Nino
; El Nino-Southern Oscillation
; monsoon
; numerical model
; oceanic general circulation model
; Indian Ocean
; Pacific Ocean
; Pacific Ocean (West)
英文摘要: The response of the boreal summer mean tropical circulation to anomalies in diabatic heating during the strong El Nĩo events of 1972, 1987, and 1997 is studied, with particular focus on the Indian region. In experiments with theatmospheric general circulation model of the National Center for Atmospheric Research, anomalous diabatic heating fieldsareadded to the full temperature tendency of the Community Atmosphere Model, version 3 (CAM3). The boundary conditions are specified climatological sea surface temperatures everywhere but over the Indian and western Pacific Oceans, where a slab-ocean model is used. The vertical structure of the added heating is idealized with a single maximum at 600 hPa. Theadded heating in the experiments was chosen on the basis of the 1972, 1987, and 1997 diabatic heating anomalies in the Pacific and Indian Oceans diagnosed from reanalyses. Integrations extended from May to August with 20 different initial conditions. The 1972 and 1987 experiments produced an anomalous anticyclonic circulation extending westward toward the Indian region, accompanied by negative total (added plus CAM3 produced) diabatic heating anomalies over India. A similar result was obtained for 1997 when only the Pacific Ocean diabatic heating was added. The heating over the central Pacificis shown to be more important than the western Pacific cooling. When the added heating also took into account anomalies over the Indian Ocean, the anomalous anticyclonic circulation weakens, while the total Indian heating anomaly is quite small. These results suggest the importance of the Indian Ocean heating for the 1997 monsoon circulation, but do not constitute a complete explanation since the Indian Ocean heating was given a priori. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52144
Appears in Collections: 气候变化事实与影响
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作者单位: Center for Ocean-Land-Atmosphere Studies, 4041 Powder Mill Rd., Suite 302, Calverton, MD 20705, United States; Department of Atmospheric, Oceanic, and Earth Sciences, George Mason University, Fairfax, VA, United States
Recommended Citation:
Jang Y.,Straus D.M.. The Indian monsoon circulation response to El Niño diabatic heating[J]. Journal of Climate,2012-01-01,25(21)