Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-16-0325.1 |
Understanding the Revival of the Indian Summer Monsoon after Breaks | |
Govardhan, Dandu1; Rao, Vadlamudi Brahmananda2; Ashok, Karumuri1 | |
2017-05-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2017 |
卷号 | 74期号:5 |
文章类型 | Article |
语种 | 英语 |
国家 | India; Brazil |
英文摘要 | In this paper, the authors suggest a dynamical mechanism involved in the revival of the summer monsoon after breaks. In this context, the authors carry out a diagnostic analysis using the datasets from National Centers for Environmental Prediction Reanalysis 2 for the period 1979-2007 to identify a robust mechanism that typifies breaks and subsequent revival of monsoon. The authors find during the peak of significant breaks an anomalous southward shift of the subtropical westerly jet stream, which is invariably accompanied by an anomalous northward shift of a stronger-than-normal easterly jet. These major changes during a break facilitate an instability mechanism, which apparently leads to formation of a synoptic disturbance. Formation of such a disturbance is critical to the subsequent revival of the summer monsoon in 61% of the observed break-to- active revivals. Computations of energetics and correlation analysis carried out suggest an increase in the eddy kinetic energy at the expense of the mean kinetic energy during the breaks, in agreement with the formation of the synoptic disturbance. This demonstrates that barotropic instability in the presence of a monsoon basic flow is the primary physical mechanism that controls the revival of the summer monsoon subsequent to the break events. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000400730900005 |
WOS关键词 | BAROTROPIC-BAROCLINIC INSTABILITY ; INTRASEASONAL OSCILLATIONS ; RAINFALL ; PATTERNS ; JET ; DEPRESSIONS ; VARIABILITY ; SATELLITE ; DROUGHTS ; GROWTH |
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/29552 |
专题 | 地球科学 |
作者单位 | 1.Univ Hyderabad, Univ Ctr Earth & Space Sci, Hyderabad, Andhra Prades, India; 2.Natl Inst Space Res, Sao Paulo, Brazil |
推荐引用方式 GB/T 7714 | Govardhan, Dandu,Rao, Vadlamudi Brahmananda,Ashok, Karumuri. Understanding the Revival of the Indian Summer Monsoon after Breaks[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(5). |
APA | Govardhan, Dandu,Rao, Vadlamudi Brahmananda,&Ashok, Karumuri.(2017).Understanding the Revival of the Indian Summer Monsoon after Breaks.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(5). |
MLA | Govardhan, Dandu,et al."Understanding the Revival of the Indian Summer Monsoon after Breaks".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.5(2017). |
条目包含的文件 | 条目无相关文件。 |
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