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DOI | 10.1007/s00382-017-3750-6 |
Dynamical and thermodynamical coupling between the North Atlantic subtropical high and the marine boundary layer clouds in boreal summer | |
Wei, Wei1,2,5; Li, Wenhong2; Deng, Yi3; Yang, Song1,5; Jiang, Jonathan H.4; Huang, Lei4; Liu, W. Timothy4 | |
2018-04-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 50页码:2457-2469 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | This study investigates dynamical and thermodynamical coupling between the North Atlantic subtropical high (NASH), marine boundary layer (MBL) clouds, and the local sea surface temperatures (SSTs) over the North Atlantic in boreal summer for 1984-2009 using NCEP/DOE Reanalysis 2 dataset, various cloud data, and the Hadley Centre sea surface temperature. On interannual timescales, the summer mean subtropical MBL clouds to the southeast of the NASH is actively coupled with the NASH and local SSTs: a stronger (weaker) NASH is often accompanied with an increase (a decrease) of MBL clouds and abnormally cooler (warmer) SSTs along the southeast flank of the NASH. To understand the physical processes between the NASH and the MBL clouds, the authors conduct a data diagnostic analysis and implement a numerical modeling investigation using an idealized anomalous atmospheric general circulation model (AGCM). Results suggest that significant northeasterly anomalies in the southeast flank of the NASH associated with an intensified NASH tend to induce stronger cold advection and coastal upwelling in the MBL cloud region, reducing the boundary surface temperature. Meanwhile, warm advection associated with the easterly anomalies from the African continent leads to warming over the MBL cloud region at 700 hPa. Such warming and the surface cooling increase the atmospheric static stability, favoring growth of the MBL clouds. The anomalous diabatic cooling associated with the growth of the MBL clouds dynamically excites an anomalous anticyclone to its north and contributes to strengthening of the NASH circulation in its southeast flank. The dynamical and thermodynamical couplings and their associated variations in the NASH, MBL clouds, and SSTs constitute an important aspect of the summer climate variability over the North Atlantic. |
英文关键词 | North Atlantic subtropical high Marine boundary layer clouds Sea surface temperatures Dynamical and thermodynamical coupling processes |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000428600200009 |
WOS关键词 | SOUTHEASTERN UNITED-STATES ; SEA-SURFACE TEMPERATURE ; INTERANNUAL VARIABILITY ; WARMING CLIMATE ; SEASONAL CYCLE ; ANTICYCLONE ; HEMISPHERE ; PACIFIC ; OCEAN ; INTENSIFICATION |
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/36089 |
专题 | 气候变化 |
作者单位 | 1.Sun Yat Sen Univ, Sch Atmospher Sci, Guangzhou, Guangdong, Peoples R China; 2.Duke Univ, Nicholas Sch Environm, Earth & Ocean Sci, Durham, NC 27708 USA; 3.Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA; 4.CALTECH, Jet Prop Lab, Pasadena, CA USA; 5.Sun Yat Sen Univ, Guangdong Prov Key Lab Climate Change & Nat Disas, Guangzhou, Guangdong, Peoples R China |
推荐引用方式 GB/T 7714 | Wei, Wei,Li, Wenhong,Deng, Yi,et al. Dynamical and thermodynamical coupling between the North Atlantic subtropical high and the marine boundary layer clouds in boreal summer[J]. CLIMATE DYNAMICS,2018,50:2457-2469. |
APA | Wei, Wei.,Li, Wenhong.,Deng, Yi.,Yang, Song.,Jiang, Jonathan H..,...&Liu, W. Timothy.(2018).Dynamical and thermodynamical coupling between the North Atlantic subtropical high and the marine boundary layer clouds in boreal summer.CLIMATE DYNAMICS,50,2457-2469. |
MLA | Wei, Wei,et al."Dynamical and thermodynamical coupling between the North Atlantic subtropical high and the marine boundary layer clouds in boreal summer".CLIMATE DYNAMICS 50(2018):2457-2469. |
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