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学科主题: 地理学::自然地理学
题名: Impact of springtime Himalayan-Tibetan Plateau snowpack on the onset of the Indian summer monsoon in coupled seasonal forecasts
作者: Senan, R (Senan, Retish)1, 2; Orsolini, YJ (Orsolini, Yvan J.)3, 4; Weisheimer, A (Weisheimer, Antje)5, 6; Vitart, F (Vitart, Frederic)5; Balsamo, G (Balsamo, Gianpaolo)5; Stockdale, TN (Stockdale, Timothy N.)5; Dutra, E (Dutra, Emanuel)5; Doblas-Reyes, FJ (Doblas-Reyes, Francisco J.)7, 8, 9; Basang, D (Basang, Droma)10, 11
通讯作者: Senan, R
关键词: DATA ASSIMILATION SYSTEM ; OBJECTIVE DEFINITION ; EL-NINO ; COVER ; VARIABILITY ; RAINFALL ; PREDICTION ; ENSO ; PREDICTABILITY ; TELECONNECTION
刊名: CLIMATE DYNAMICS
发表日期: 2016
DOI: 10.1007/s00382-016-2993-y
卷: 47, 期:9-10, 页:2709-2725
收录类别: SCI
合作性质: 国际
文章类型: Article
部门归属: 环境
英文摘要: The springtime snowpack over the Himalayan-Tibetan Plateau (HTP) region and Eurasia has long been suggested to be an influential factor on the onset of the Indian summer monsoon. To assess the impact of realistic initialization of springtime snow over HTP on the onset of the Indian summer monsoon, we examine a suite of coupled ocean-atmosphere 4-month ensemble reforecasts made at the European Centre for Medium-Range Weather Forecasts, using their Seasonal Forecasting System 4. The reforecasts were initialized on 1 April every year for the period 1981-2010. In these seasonal reforecasts, the snow is initialized "realistically" with ERA-Interim/Land Reanalysis. In addition, we carried out an additional set of forecasts, identical in all aspects except that initial conditions for snow-related land surface variables over the HTP region are randomized. We show that high snow depth over HTP influences the meridional tropospheric temperature gradient reversal that marks the monsoon onset. Composite difference based on a normalized HTP snow index reveal that, in high snow years, (1) the onset is delayed by about 8 days, and (2) negative precipitation anomalies and warm surface conditions prevail over India. We show that about half of this delay can be attributed to the realistic initialization of snow over the HTP region. We further demonstrate that high April snow depths over HTP are not uniquely influenced by El Nino-Southern Oscillation, the Indian Ocean Dipole or the North Atlantic Oscillation.
语种: 英语
WOS记录号: WOS:000386062000001
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7513
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Univ Oslo, Dept Geosci, POB 1022, N-0315 Oslo, Norway
2.European Ctr Medium Range Weather Forecasts, Reading, Berks, England
3.Norwegian Inst Air Res NILU, Kjeller, Norway
4.Bjerknes Ctr Climate Res, Bergen, Norway
5.European Ctr Medium Range Weather Forecasts, Reading, Berks, England
6.Univ Oxford, Dept Phys, UK Natl Ctr Atmospher Sci NCAS, Oxford, England
7.CREA, Barcelona, Spain
8.BSC CNS, Barcelona, Spain
9.Inst Catala Ciencies Clima IC3, Barcelona, Spain
10.Univ Bergen, Inst Geophys, Bergen, Norway
11.Inst Tibetan Plateau Atmospher & Environm Sci Res, Lhasa, Tibet, Peoples R China

Recommended Citation:
Senan, R ,Orsolini, YJ ,Weisheimer, A ,et al. Impact of springtime Himalayan-Tibetan Plateau snowpack on the onset of the Indian summer monsoon in coupled seasonal forecasts[J]. CLIMATE DYNAMICS,2016,47(9-10):2709-2725.
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