globalchange  > 过去全球变化的重建
DOI: 10.1029/2018JD029574
WOS记录号: WOS:000469175600010
论文题名:
How Will a Warming Climate Affect the Benguela Coastal Low-Level Wind Jet?
作者: Lima, Daniela C. A.1; Soares, Pedro M. M.1; Semedo, Alvaro1,2; Cardoso, Rita M.1; Cabos, William3; Sein, Dmitry V.4,5
通讯作者: Lima, Daniela C. A.
刊名: JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN: 2169-897X
EISSN: 2169-8996
出版年: 2019
卷: 124, 期:9, 页码:5010-5028
语种: 英语
WOS关键词: HIGH-RESOLUTION PROJECTIONS ; MARINE BOUNDARY-LAYER ; SURFACE-TEMPERATURE ; NORTHERN CALIFORNIA ; MODEL ; INTENSIFICATION ; PRECIPITATION ; AFRICA ; IMPACT
WOS学科分类: Meteorology & Atmospheric Sciences
WOS研究方向: Meteorology & Atmospheric Sciences
英文摘要:

The strong coastal upwelling associated to the Benguela eastern boundary upwelling system makes the ocean along coast of this current one of the most productive ecosystems in the world. The Benguela Coastal Low-Level Jet (BCLLJ) is one of the most important mesoscale feature that shape the climate of this region. The main synoptic forcing of the BCLLJ is the Angola thermal low over land and the St. Helen anticyclone over the ocean, resulting in southwesterly winds along the coast. This study investigates how the BCLLJ might change due to climate warming, with the help of uncoupled and coupled simulations from a 25-km horizontal resolution regional climate model (ROM). In general, the coupled simulation displays the best performance in representing the present time near-surface wind speed, with a decrease on the known warm bias of sea surface temperature in the Benguela eastern boundary upwelling system region. The analysis of the projected changes of the BCLLJ climate toward the end of the 21st century (2070-2099), following the RCP8.5 emissions scenario, shows an increase in the frequency of the BCLLJ occurrence along the southern area with higher changes in the coupled simulation (between 6% and 8%). These changes are related to a southerly shift of the St. Helen High, which intensifies the flow offshore the west coast of South Africa and causes a sharpening of the land-sea thermal contrasts. However, during spring, associated with the decrease in near-surface wind speed due to higher sea surface temperatures, the future frequency and intensity of the BCLLJ are lower.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/138449
Appears in Collections:过去全球变化的重建

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作者单位: 1.Univ Lisbon, Inst Dom Luiz, Fac Ciencias, Lisbon, Portugal
2.IHE Delft, Dept Water Sci & Engn, Delft, Netherlands
3.Univ Alcala De Henares, Dept Phys & Math, Madrid, Spain
4.Alfred Wegener Inst Polar & Marine Res, Bremerhaven, Germany
5.Russian Acad Sci, Shirshov Inst Oceanol, Moscow, Russia

Recommended Citation:
Lima, Daniela C. A.,Soares, Pedro M. M.,Semedo, Alvaro,et al. How Will a Warming Climate Affect the Benguela Coastal Low-Level Wind Jet?[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019-01-01,124(9):5010-5028
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