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DOI | 10.1175/JCLI-D-16-0818.1 |
Coupling of Trade Winds with Ocean Circulation Damps ITCZ Shifts | |
Green, Brian; Marshall, John | |
2017-06-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The position of the intertropical convergence zone (ITCZ) is sensitive to the atmosphere's hemispheric energy balance, lying in the hemisphere most strongly heated by radiative and turbulent surface energy fluxes. This study examines how the ocean circulation, through its cross-equatorial energy transport and associated surface energy fluxes, affects the ITCZ's response to an imposed interhemispheric heating contrast in a coupled atmosphere-ocean general circulation model. Shifts of the ITCZ are strongly damped owing to a robust coupling between the atmosphere's Hadley cells and the ocean's subtropical cells by the trade winds and their associated surface stresses. An anomalous oceanic wind-driven cross-equatorial cell transports energy across the equator, strongly offsetting the imposed heating contrast. The circulation of this cell can be described by the combination of trade wind anomalies and the meridional gradient of sea surface temperature, which sets the temperature contrast between its upper and lower branches. The ability of the wind-driven ocean circulation to damp ITCZ shifts represents a previously unappreciated constraint on the atmosphere's energy budget and indicates that the position of the ITCZ may be much less sensitive to interhemispheric heating contrasts than previously thought. Climatic implications of this damping are discussed. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000402379600004 |
WOS关键词 | INTERTROPICAL CONVERGENCE ZONE ; HEAT-TRANSPORT ; OVERTURNING CIRCULATION ; ENERGY-TRANSPORT ; SUBTROPICAL CELL ; INDIAN-OCEAN ; ATMOSPHERE ; DYNAMICS ; POSITION ; MODEL |
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/20974 |
专题 | 气候变化 |
作者单位 | MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA |
推荐引用方式 GB/T 7714 | Green, Brian,Marshall, John. Coupling of Trade Winds with Ocean Circulation Damps ITCZ Shifts[J]. JOURNAL OF CLIMATE,2017,30(12). |
APA | Green, Brian,&Marshall, John.(2017).Coupling of Trade Winds with Ocean Circulation Damps ITCZ Shifts.JOURNAL OF CLIMATE,30(12). |
MLA | Green, Brian,et al."Coupling of Trade Winds with Ocean Circulation Damps ITCZ Shifts".JOURNAL OF CLIMATE 30.12(2017). |
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