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DOI | 10.1007/s00382-019-04712-5 |
Tropical intraseasonal oscillation at monthly time scale during boreal summer and winter | |
Krishnamurthy, V1; Hazra, Abheera2,3 | |
2019-09-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 53页码:3387-3407 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | This study describes the space-time structure of an intraseasonal oscillation with the time scale of a month over the South Asian monsoon region and the tropical Pacific for the boreal summer and winter seasons. These nonlinear oscillations were extracted by applying multichannel singular spectrum analysis on daily anomalies of three-dimensional diabatic heating separately during the summer and winter. The monthly oscillations (MOs) are distinct from the leading monsoon intraseasonal oscillation with a period of 45 days during the summer and the Madden-Julian Oscillation during the winter. The summer MO exhibits horizontal quadrupole structure predominantly in the Northern Hemisphere and propagates eastward over the Indian region and westward over the Pacific along with northward movement. The winter MO is confined to the equatorial region in the Southern Hemisphere and propagates eastward and southward. Both the summer and winter MOs consist of propagating deep vertical columns of heating and cooling anomalies. The associated fields of convection, precipitation and three-dimensional circulation show similar patterns and propagation. The corresponding specific humidity has revealed moisture preconditioning for horizontal propagation and co-located vertical advection. However, there is no clear pattern of ocean-atmosphere interaction associated with the MO as seen in the examination of sea surface temperature and latent heat flux. |
英文关键词 | Intraseasonal oscillation Diabatic heating Tropical climate Indian monsoon |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000483626900053 |
WOS关键词 | MJO ; VARIABILITY ; REANALYSES ; PATTERNS |
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/186381 |
专题 | 气候变化 |
作者单位 | 1.George Mason Univ, Ctr Ocean Land Atmosphere Studies, 4400 Univ Dr, Fairfax, VA 22030 USA; 2.Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA; 3.NASA, Goddard Space Flight Ctr, Hydrol Sci Lab, Greenbelt, MD USA |
推荐引用方式 GB/T 7714 | Krishnamurthy, V,Hazra, Abheera. Tropical intraseasonal oscillation at monthly time scale during boreal summer and winter[J]. CLIMATE DYNAMICS,2019,53:3387-3407. |
APA | Krishnamurthy, V,&Hazra, Abheera.(2019).Tropical intraseasonal oscillation at monthly time scale during boreal summer and winter.CLIMATE DYNAMICS,53,3387-3407. |
MLA | Krishnamurthy, V,et al."Tropical intraseasonal oscillation at monthly time scale during boreal summer and winter".CLIMATE DYNAMICS 53(2019):3387-3407. |
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