GSTDTAP  > 气候变化
DOI10.1007/s00382-018-4155-x
Land-atmosphere-ocean interactions in the southeastern Atlantic: interannual variability
Sun, Xiaoming; Vizy, Edward K.; Cook, Kerry H.
2019
发表期刊CLIMATE DYNAMICS
ISSN0930-7575
EISSN1432-0894
出版年2019
卷号52页码:539-561
文章类型Article
语种英语
国家USA
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 Nino-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.


领域气候变化
收录类别SCI-E
WOS记录号WOS:000460619200032
WOS关键词SURFACE TEMPERATURE ANOMALIES ; BENGUELA UPWELLING SYSTEM ; SOUTHERN ANNULAR MODE ; WEST-AFRICAN MONSOON ; AIR-SEA INTERACTION ; TROPICAL ATLANTIC ; PART I ; RAINFALL VARIABILITY ; COUPLED VARIABILITY ; CIRCULATION
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/35990
专题气候变化
作者单位Univ Texas Austin, Dept Geol Sci, Jackson Sch Geosci, 2275 Speedway,Stop C9000, Austin, TX 78712 USA
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GB/T 7714
Sun, Xiaoming,Vizy, Edward K.,Cook, Kerry H.. Land-atmosphere-ocean interactions in the southeastern Atlantic: interannual variability[J]. CLIMATE DYNAMICS,2019,52:539-561.
APA Sun, Xiaoming,Vizy, Edward K.,&Cook, Kerry H..(2019).Land-atmosphere-ocean interactions in the southeastern Atlantic: interannual variability.CLIMATE DYNAMICS,52,539-561.
MLA Sun, Xiaoming,et al."Land-atmosphere-ocean interactions in the southeastern Atlantic: interannual variability".CLIMATE DYNAMICS 52(2019):539-561.
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