气候变化领域集成服务门户(CCPortal): Land–atmosphere–ocean interactions in the southeastern Atlantic: interannual variability

CCPortal

DOI	10.1007/s00382-018-4155-x
	Land–atmosphere–ocean interactions in the southeastern Atlantic: interannual variability
	Sun X.; Vizy E.K.; Cook K.H.
发表日期	2019
ISSN	0930-7575
起始页码	539
结束页码	561
卷号	52 期号:2020-01-02
英文摘要	Land–atmosphere–ocean interactions in the southeastern South Atlantic and their connections to interannual variability are examined using a regional climate model coupled with an intermediate-level ocean model. In austral summer, zonal displacements of the South Atlantic subtropical high (SASH) can induce variations of mixed-layer currents in the Benguela upwelling region through surface wind stress curl anomalies near the Namibian coast, and an eastward shifted SASH is related to the first Pacific–South American mode. When the SASH is meridionally displaced, mixed layer vertically-integrated Ekman transport anomalies are mainly a response to the change of alongshore surface wind stress. The latitudinal shift of the SASH tends to dampen the anomalous alongshore wind by modulating the land-sea thermal contrast, while opposed by oceanic diffusion. Although the position of the SASH is closely linked to the phase of El Niño–Southern Oscillation (ENSO) and the southern annular mode (SAM) in austral summer, an overall relationship between Benguela upwelling strength and ENSO or SAM is absent. During austral winter, variations of the mixed layer Ekman transport in the Benguela upwelling region are connected to the strength of the SASH through its impact on both coastal wind stress curl and alongshore surface wind stress. Compared with austral summer, low-level cloud cover change plays a more important role. Although wintertime sea surface temperature fluctuations in the equatorial Atlantic are strong and may act to influence variability over the northern Benguela area, the surface heat budget analysis suggests that local air-sea interactions dominate. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
语种	英语
scopus关键词	air-sea interaction; annual variation; land-sea interaction; seasonal variation; surface wind; wind stress; Atlantic Ocean; Benguela Basin
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146630
作者单位	Department of Geological Sciences, Jackson School of Geosciences, The University of Texas at Austin, 2275 Speedway, Stop C9000, Austin, TX 78712, United States
推荐引用方式 GB/T 7714	Sun X.,Vizy E.K.,Cook K.H.. Land–atmosphere–ocean interactions in the southeastern Atlantic: interannual variability[J],2019,52(2020-01-02).
APA	Sun X.,Vizy E.K.,&Cook K.H..(2019).Land–atmosphere–ocean interactions in the southeastern Atlantic: interannual variability.Climate Dynamics,52(2020-01-02).
MLA	Sun X.,et al."Land–atmosphere–ocean interactions in the southeastern Atlantic: interannual variability".Climate Dynamics 52.2020-01-02(2019).