Observation of the marine atmospheric boundary layer in the Gulf of Guinea during the 2006 boreal spring
Observation of the marine atmospheric boundary layer in the Gulf of Guinea during the 2006 boreal spring
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2006年寒带春季几内亚湾海洋大气边界层观测
DOI：
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
G. de Coëtlogon
中科院分区：
文献类型：
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作者：
M. Leduc;L. Eymard;G. de Coëtlogon
2006 年 4 月至 7 月的现场卫星和模型分析数据被用来调查几内亚湾海面温度（SST）与海洋大气边界层（MABL）之间的联系。 10°W至6°E之间的研究区域分为三个具有不同特征的区域：北部区域（4.5°N至1°N），大气最潮湿，海温最温暖；上升流区域（1°N至4°S），海温下降最强；南部区域（4°S至8°S），大气较干燥，海温下降较上升区域更慢。该地区海气相互作用的关键区域似乎是北部区和上升流区之间的海温锋面。一方面，对锋面两侧的MABL的研究表明，在地表和约500 m高之间有一个充分混合的层，对地表变化敏感，当海表温度降低（增加）时，该层变得更浅（更深）。 MABL 高度（约 1500 m）遵循相同的变化，但与 SST 变化并不完全一致。另一方面，对跨海温锋面的 MABL 的观测显示，南部地区东南风增强，同时上升流区域海温急剧下降。在后者中，风在较冷的海温以上减弱。此外，北部地区海温偏暖以上风力增强。然而，4 月风加速度从赤道延伸至 2°N，6 月更远至 4°N。 4 月份在北纬 2°附近观察到一个辐合带，表明那里有对流活动，受到海温锋的青睐。版权所有 © 2011 英国皇家气象学会
In situ, satellite and model analyses data in April–July 2006 are used to investigate the links between sea surface temperature (SST) and the marine atmospheric boundary layer (MABL) in the Gulf of Guinea. The study region between 10°W and 6°E is divided into three areas with different characteristics: the North Area (4.5°N to 1°N) with the wettest atmosphere and the warmest SST, the Upwelling Area (1°N to 4°S) with the strongest SST decrease, and the South Area (4°S to 8°S) with a drier atmosphere and a more slowly decreasing SST than in the Upwelling Area. The key zone of the air‐sea interactions in this region seems to be the SST front between North and Upwelling Areas. On the one hand, the study of the MABL on either side of the front shows a well‐mixed layer between the surface and about 500 m high, sensitive to surface variations, which gets shallower (deeper) when the SST decreases (increases). The MABL height (about 1500 m) follows the same variations but is not exactly collocated with the SST variations. On the other hand, the observation of the MABL across the SST front shows a strengthening of southeasterlies in the South Area coinciding with a strong SST decrease in the Upwelling Area. In the latter, the wind weakens above the colder SST. Besides, in the North Area, the wind strengthens above the warmer SST. However, the wind acceleration spans from the equator to 2°N in April and as far as 4°N in June. A convergence zone is observed in the vicinity of 2°N in April, suggesting a convection activity there, favoured by the SST front. Copyright © 2011 Royal Meteorological Society
EGEE-3 活动期间 PIRATA 浮标赤道大西洋昼夜周期的一维建模研究
影响因子：
2.3
作者：
G. Caniaux;Y. DuPenhoat;M. Dengler;H. Giordani;R. Hummels
通讯作者：
R. Hummels