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DOI | 10.1175/JCLI-D-18-0623.1 |
Modulation of Monsoon Circulations by Cross-Equatorial Ocean Heat Transport | |
Lutsko, Nicholas J.1; Marshall, John1; Green, Brian2 | |
2019-06-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:12页码:3471-3485 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Motivated by observations of southward ocean heat transport (OHT) in the northern Indian Ocean during summer, the role of the ocean in modulating monsoon circulations is explored by coupling an atmospheric model to a slab ocean with an interactive representation of OHT and an idealized subtropical continent. Southward OHT by the cross-equatorial cells is caused by Ekman flow driven by southwesterly monsoon winds in the summer months, cooling sea surface temperatures (SSTs) south of the continent. This increases the reversed meridional surface gradient of moist static energy, shifting the precipitation maximum over the land and strengthening the monsoonal circulation, in the sense of enhancing the vertical wind shear. However, the atmosphere's cross-equatorial meridional overturning circulation is also weakened by the presence of southward OHT, as the atmosphere is required to transport less energy across the equator. The sensitivity of these effects to varying the strength of the OHT, fixing the OHT at its annual-mean value, and to removing the land is explored. Comparisons with more realistic models suggest that the idealized model used in this study produces a reasonable representation of the effect of OHT on SSTs equatorward of subtropical continents, and hence can be used to study the role of OHT in shaping monsoon circulations on Earth. |
英文关键词 | Atmosphere-ocean interaction Energy transport Monsoons |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000468768100001 |
WOS关键词 | PART I ; DYNAMICS ; ATMOSPHERE ; IMPACT ; VARIABILITY ; PLATEAU ; FLUXES ; SYSTEM ; CYCLE |
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/183855 |
专题 | 气候变化 |
作者单位 | 1.MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA; 2.Univ Washington, Joint Inst Study Atmosphere & Ocean, Seattle, WA 98195 USA |
推荐引用方式 GB/T 7714 | Lutsko, Nicholas J.,Marshall, John,Green, Brian. Modulation of Monsoon Circulations by Cross-Equatorial Ocean Heat Transport[J]. JOURNAL OF CLIMATE,2019,32(12):3471-3485. |
APA | Lutsko, Nicholas J.,Marshall, John,&Green, Brian.(2019).Modulation of Monsoon Circulations by Cross-Equatorial Ocean Heat Transport.JOURNAL OF CLIMATE,32(12),3471-3485. |
MLA | Lutsko, Nicholas J.,et al."Modulation of Monsoon Circulations by Cross-Equatorial Ocean Heat Transport".JOURNAL OF CLIMATE 32.12(2019):3471-3485. |
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