Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-017-3865-9 |
The role of potential vorticity anomalies in the Somali Jet on Indian Summer Monsoon Intraseasonal Variability | |
Rai, P.1; Joshi, M.2,3; Dimri, A. P.1; Turner, A. G.4,5 | |
2018-06-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 50页码:4149-4169 |
文章类型 | Article |
语种 | 英语 |
国家 | India; England |
英文摘要 | The climate of the Indian subcontinent is dominated by rainfall arising from the Indian summer monsoon (ISM) during June to September. Intraseasonal variability during the monsoon is characterized by periods of heavy rainfall interspersed by drier periods, known as active and break events respectively. Understanding and predicting such events is of vital importance for forecasting human impacts such as water resources. The Somali Jet is a key regional feature of the monsoon circulation. In the present study, we find that the spatial structure of Somali Jet potential vorticity (PV) anomalies varies considerably during active and break periods. Analysis of these anomalies shows a mechanism whereby sea surface temperature (SST) anomalies propagate north/northwestwards through the Arabian Sea, caused by a positive feedback loop joining anomalies in SST, convection, modification of PV by diabatic heating and mixing in the atmospheric boundary layer, wind-stress curl, and ocean upwelling processes. The feedback mechanism is consistent with observed variability in the coupled ocean-atmosphere system on timescales of approximately 20 days. This research suggests that better understanding and prediction of monsoon intraseasonal variability in the South Asian monsoon may be gained by analysis of the day-to-day dynamical evolution of PV in the Somali Jet. |
英文关键词 | Indian Summer Monsoon (ISM) Somali Jet Potential vorticity Wind-stress curl Intraseasonal variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000432597400012 |
WOS关键词 | SEA-SURFACE TEMPERATURE ; MIXED-LAYER PROCESSES ; INTERANNUAL VARIABILITY ; ARABIAN SEA ; OCEAN ; RAINFALL ; BENGAL ; BREAKS ; BAY ; OSCILLATIONS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/35279 |
专题 | 气候变化 |
作者单位 | 1.Jawaharlal Nehru Univ, Sch Environm Sci, New Delhi 110067, India; 2.Univ East Anglia, Ctr Ocean & Atmospher Sci, Norwich, Norfolk, England; 3.Univ East Anglia, Climat Res Unit, Norwich, Norfolk, England; 4.Univ Reading, NCAS Climate, Reading, Berks, England; 5.Univ Reading, Dept Meteorol, Reading, Berks, England |
推荐引用方式 GB/T 7714 | Rai, P.,Joshi, M.,Dimri, A. P.,et al. The role of potential vorticity anomalies in the Somali Jet on Indian Summer Monsoon Intraseasonal Variability[J]. CLIMATE DYNAMICS,2018,50:4149-4169. |
APA | Rai, P.,Joshi, M.,Dimri, A. P.,&Turner, A. G..(2018).The role of potential vorticity anomalies in the Somali Jet on Indian Summer Monsoon Intraseasonal Variability.CLIMATE DYNAMICS,50,4149-4169. |
MLA | Rai, P.,et al."The role of potential vorticity anomalies in the Somali Jet on Indian Summer Monsoon Intraseasonal Variability".CLIMATE DYNAMICS 50(2018):4149-4169. |
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