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DOI | 10.1029/2018GL078804 |
MJO Affects the Monsoon Onset Timing Over the Indian Region | |
Taraphdar, Sourav1,2,3; Zhang, Fuqing1,2; Leung, L. Ruby4; Chen, Xingchao1,2; Pauluis, Olivier M.3,5 | |
2018-09-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:18页码:10011-10018 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; U Arab Emirates |
英文摘要 | This study examines the linkage between the Madden-Julian oscillation (MJO) and the South Asian summer monsoon onset through spatiotemporal wave-filtering and composite analyses of observational data sets during 1979-2016. We identify two major factors in determining the summer monsoon onset timing: the background conditions associated with seasonal transitions and the intraseasonal variations associated with an active MJO. The background conditions undergo sharp seasonal transition over the western Indian Ocean two to three pentads before the onset dates, while a typical monsoon onset is often associated with the arrival of the wet phase of the tropical MJO over the Indian Ocean, likely due to the promotion by the MJO-initiated eastward propagating westerly wind anomaly. Conversely, the atmospheric circulation associated with the leading dry phase of a strong MJO during the climatological mean onset dates may lead to a delayed monsoon onset. Plain Language Summary The Madden-Julian oscillation (MJO) is one of the dominant modes of intraseasonal variabilities in the tropical atmosphere, while the Asian summer monsoon represents one of the most significant transitions in the large-scale atmospheric and oceanic circulations in the Indo-Pacific regions and beyond. This study examines the linkage between MJO and the South Asian summer monsoon onset through composite analysis of decades of observational data sets along with a global space-time wave-filtering technique. We identify two major factors in determining the summer monsoon onset timing: the background conditions associated with seasonal transitions and the intraseasonal variations associated with an active MJO. The onset of the Indian summer monsoon is often associated with the arrival of the wet phase of the tropical MJO over the Indian Ocean, while a delayed monsoon onset is likely caused by the dry phase of a strong MJO that suppresses background changes associated with seasonal transition during the climatological mean onset dates. |
英文关键词 | MJO monsoon monsoon onset Indian monsoon Asian monsoon |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000447761300074 |
WOS关键词 | 40-50 DAY OSCILLATION ; SUMMER MONSOON ; EQUATORIAL WAVES ; EL-NINO ; TEMPERATURE ; VARIABILITY ; FEATURES ; KERALA |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/25560 |
专题 | 气候变化 |
作者单位 | 1.Penn State Univ, Dept Meteorol & Atmospher Sci, University Pk, PA 16802 USA; 2.Penn State Univ, Ctr Adv Data Assimilat & Predictabil Tech, University Pk, PA 16802 USA; 3.New York Univ Abu Dhabi, Ctr Prototype Climate Modeling, Abu Dhabi, U Arab Emirates; 4.Pacific Northwest Natl Lab, Atmospher Sci & Global Change Div, Richland, WA USA; 5.NYU, Courant Inst Math Sci, New York, NY USA |
推荐引用方式 GB/T 7714 | Taraphdar, Sourav,Zhang, Fuqing,Leung, L. Ruby,et al. MJO Affects the Monsoon Onset Timing Over the Indian Region[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(18):10011-10018. |
APA | Taraphdar, Sourav,Zhang, Fuqing,Leung, L. Ruby,Chen, Xingchao,&Pauluis, Olivier M..(2018).MJO Affects the Monsoon Onset Timing Over the Indian Region.GEOPHYSICAL RESEARCH LETTERS,45(18),10011-10018. |
MLA | Taraphdar, Sourav,et al."MJO Affects the Monsoon Onset Timing Over the Indian Region".GEOPHYSICAL RESEARCH LETTERS 45.18(2018):10011-10018. |
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