Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/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
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
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 | |
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 |
推荐引用方式 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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