DOI: 10.1175/JCLI-D-14-00280.1
Scopus记录号: 2-s2.0-84926050473
论文题名: Space-time structure of diabatic heating in monsoon intraseasonal oscillation
作者: Hazra A. ; Krishnamurthy V.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 6 起始页码: 2234
结束页码: 2255
语种: 英语
Scopus关键词: Atmospheric thermodynamics
; Climate change
; Moisture
; Spectrum analysis
; Tropical engineering
; Weather forecasting
; Climate variability
; Diabatic heating
; European centre for medium-range weather forecasts
; Intraseasonal oscillations
; Intraseasonal variability
; Multichannel singular spectrum analysis
; Outgoing longwave radiation
; Tropical variability
; Heating
; climate oscillation
; climate variation
; diabatic process
; longwave radiation
; monsoon
; synoptic meteorology
; thermodynamics
; three-dimensional modeling
; Indian Ocean
; Indian Ocean (Equatorial)
; Pacific Ocean
; Pacific Ocean (Equatorial)
; South Asia
英文摘要: The space-time structure of the leading monsoon intraseasonal oscillation (MISO) in three-dimensional diabatic heating is studied. Using the ERA-Interim data of the European Centre for Medium-Range Weather Forecasts, the diabatic heating data were constructed by the residual method of the thermodynamic equation. The MISO was extracted by applying multichannel singular spectrum analysis on the daily anomalies of three-dimensional diabatic heating over the South Asian monsoon region for the period 1979-2011.The diabatic heating MISO has a period of 45 days, and exhibits eastward propagation in the equatorial Indian and Pacific Oceans and northward propagation over the entire monsoon region. The horizontal structure shows a long tilted band of heating anomalies propagating northeastward. The period, horizontal pattern, and propagation properties of the diabatic heating MISO are similar to those found in precipitation, outgoing longwave radiation, and circulation in earlier studies. The vertical structure of the diabatic heating MISO indicates deep columns, with maximum values at about 450 hPa, propagating northeastward. The vertical structure of the heating anomalies has good correspondence with that of the moisture anomalies but with a phase difference. The moisture anomalies lead the heating anomalies and may provide a preconditioning process for the propagation mechanism. The temperature anomalies also show oscillatory behavior corresponding to the diabatic heating MISO but the phase difference between the two varies from region to region. © 2015 American Meteorological Society. 资助项目: NOAA, National Aeronautics and Space Administration
; NSF, National Aeronautics and Space Administration
; NSF, National Aeronautics and Space Administration
; NASA, National Aeronautics and Space Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50438
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric, Oceanic and Earth Sciences, George Mason University, Fairfax, VA, United States; Department of Atmospheric, Oceanic and Earth Sciences, Center for Ocean-Land-Atmosphere Studies, George Mason University, Fairfax, VA, United States
Recommended Citation:
Hazra A.,Krishnamurthy V.. Space-time structure of diabatic heating in monsoon intraseasonal oscillation[J]. Journal of Climate,2015-01-01,28(6)