DOI: 10.1175/JCLI-D-14-00292.1
Scopus记录号: 2-s2.0-84926059666
论文题名: Regional structure of the Indian summer monsoon in observations, reanalysis, and simulation
作者: Cash B.A. ; Kinter J.L. ; Adams J. ; Altshuler E. ; Huang B. ; Jin E.K. ; Manganello J. ; Marx L. ; Jung T.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 5 起始页码: 1824
结束页码: 1841
语种: 英语
Scopus关键词: Atmospheric temperature
; Atmospheric thermodynamics
; Climate models
; Oceanography
; Precipitation (meteorology)
; Soil moisture
; Surface waters
; Weather forecasting
; Anticyclonic circulation
; Climate record
; European centre for medium-range weather forecasts
; Indian summer monsoon rainfall
; Interannual variability
; Satellite observations
; Sea surface temperature (SST)
; Surface observation
; Rain
; annual variation
; atmospheric circulation
; climate modeling
; monsoon
; precipitation (climatology)
; rainfall
; regional climate
; sea surface temperature
; summer
; Bangladesh
; Bay of Bengal
; Ganges Basin
; India
; Indian Ocean
; Western Ghats
英文摘要: Regional variations in seasonal mean Indian summer monsoon rainfall and circulation for the period 1979- 2009 are investigated using multiple data products. The focus is on four separate regions: the Western Ghats (WG), the Ganges basin (GB), the Bay of Bengal (BB), and Bangladesh-northeastern India (BD). Data reliability varies strongly by region, with particularly low correlations between different products for the BB and BD regions. Correlations between regions are generally not statistically significant, indicating rainfall varies independently in these four regions. The diagnosed associations between rainfall, circulation, and sea surface temperatures can be sensitive to the choice of rainfall product, and multiple precipitation products may need to be analyzed in this region to ensure that the results are robust. Enhanced precipitation in the BD region is associated with anomalous anticyclonic circulation at 850 mb and westerly anomalies along the foothills of the Tibetan Plateau, while precipitation in the other regions is associated with cyclonic flow and easterlies. These associations provide a dynamical explanation for previously reported weak, negative correlations between BD and the other regions. In addition to observed products, atmosphere-only simulations made using the European Centre for Medium-Range Weather Forecasts (ECMWF) Integrated Forecast System (IFS) during Project Athena are analyzed. While the simulations do not reproduce the observed interannual variations in rainfall, the fidelity of the simulated precipitation and circulation structure is comparable to or even outperforms the different state-of-the-art reanalysis products considered. Accuracy in representing interannual variability and regional structure thus appears to be independent. © 2015 American Meteorological Society. 资助项目: NSF, National Science Foundation
; NSF, National Science Foundation
; NOAA, National Science Foundation
; NASA, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50642
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, Fairfax, VA, United States; George Mason University, Fairfax, VA, United States; Korea Institute of Atmospheric Prediction Systems, Seoul, South Korea; Alfred-Wegener-Institute for Polar and Marine Research, Bremerhaven, Germany
Recommended Citation:
Cash B.A.,Kinter J.L.,Adams J.,et al. Regional structure of the Indian summer monsoon in observations, reanalysis, and simulation[J]. Journal of Climate,2015-01-01,28(5)