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DOI | 10.1007/s00382-019-04881-3 |
Understanding the interannual variations of the zonal mean Indian summer monsoon seasonal rainfall | |
Dubey, Sarvesh1,2; Misra, Vasubandhu2,3,4 | |
2019-11-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 53页码:5547-5559 |
文章类型 | Article |
语种 | 英语 |
国家 | India; USA |
英文摘要 | In this study, we seek to understand the variations of the zonal mean Indian summer monsoon (ISM). It is observed that the zonal mean precipitation anomalies explain about 20-30% of the total seasonal precipitation of the ISM. Additionally, we also show that the interannual anomalies of the ISM, at least for some of the most extreme seasons display significant zonal symmetry. Therefore, understanding the interannual variations of the zonal mean precipitation is quite relevant. Furthermore, the reduced and simplified dimensionality of the zonally symmetric framework is an additional attraction. Our study shows that the zonal mean precipitation anomalies of the ISM are significantly correlated with the corresponding anomalies of the vertically integrated moist static energy (H) at interannual scales. The forcing terms of the tendency of the zonal mean H of the ISM is dominated by the meridional flux of H by the Hadley cell followed by comparably smaller, yet, significant forcing terms of transverse boundary and vertical fluxes of H. We find that the individual correlations of the zonal mean precipitation anomalies of the ISM with each of these dominant terms of H are comparably weak in the core latitudes of the ISM. But some of the relatively weaker forcing terms of H like the radiative heating and the diffusion of the enthalpy fluxes display a very strong relationship with the corresponding zonal mean precipitation anomalies. These results suggest that although the description of the regional Hadley cell offers a heuristic model to describe the ISM variation, it belies the intricacies of the forcing terms that maintain it. Our study suggests that the challenge of the ISM seasonal rainfall anomaly prediction even in a reduced dimensional space of a zonally symmetric framework requires all the forcing terms of H with reasonable fidelity, irrespective of their contribution to the variations of H. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000493469900023 |
WOS关键词 | MERIDIONAL CIRCULATIONS ; HADLEY CIRCULATION ; VARIABILITY ; PREDICTABILITY ; PRECIPITATION ; REANALYSIS ; HEMISPHERE ; ENSO |
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/187911 |
专题 | 气候变化 |
作者单位 | 1.Indian Inst Technol Delhi, Ctr Atmospher Sci, New Delhi 110016, India; 2.Florida State Univ, Dept Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA; 3.Florida State Univ, Ctr Ocean Atmospher Predict Studies, Tallahassee, FL 32306 USA; 4.Florida State Univ, Florida Climate Inst, Tallahassee, FL 32306 USA |
推荐引用方式 GB/T 7714 | Dubey, Sarvesh,Misra, Vasubandhu. Understanding the interannual variations of the zonal mean Indian summer monsoon seasonal rainfall[J]. CLIMATE DYNAMICS,2019,53:5547-5559. |
APA | Dubey, Sarvesh,&Misra, Vasubandhu.(2019).Understanding the interannual variations of the zonal mean Indian summer monsoon seasonal rainfall.CLIMATE DYNAMICS,53,5547-5559. |
MLA | Dubey, Sarvesh,et al."Understanding the interannual variations of the zonal mean Indian summer monsoon seasonal rainfall".CLIMATE DYNAMICS 53(2019):5547-5559. |
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