Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-17-0188.1 |
Low-Level Cool Air over the Midlatitude Oceans in Summer | |
Shimada, Teruhisa1; Kanno, Yuki2; Iwasaki, Toshiki2 | |
2018-03-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:5页码:2075-2090 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan |
英文摘要 | The climatology of low-level cool air over the midlatitude oceans in summer is presented based on an isentropic analysis. This study focuses on isentropic surfaces of 296K to analyze an adiabatic invariant referred to as the negative heat content representing the coldness of the air layer below the threshold isentropic surface. This approach allows a systematic analysis and a quantitative comparison of the cool air distribution and a diagnosis of diabatic heating of the air mass. The cool air covers most of the subarctic oceans and extends equatorward over the coastal upwelling regions in the east of the ocean basins. In these regions, the genesis of the cool air is diagnosed. The loss of the cool air occurs over land and the subtropical oceans, particularly on the offshore side of the coastal upwelling regions. In the Pacific sector and the Indian Ocean sector of the Southern Ocean, another large loss of the cool air occurs along the oceanic frontal zone including the Agulhas Return Current. Over the zonally extended region where the cool air is generated in the Southern Hemisphere and the coastal upwelling regions, it is suggested that diabatic cooling associated with low-level clouds overcome heating by turbulent surface heat fluxes. The genesis of the cool air over the subarctic oceans in the Northern Hemisphere in the warm season switches into the loss of the cold air in the cool season on a basin scale. Meanwhile, over the oceans in the Southern Hemisphere, there is no basin-scale seasonal switch. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000427438100021 |
WOS关键词 | ISENTROPIC ANALYSIS ; SOUTHERN-OCEAN ; ERA-INTERIM ; NORTHERN ; PACIFIC ; CLOUDS ; TEMPERATURE ; CIRCULATION ; AIRMASS ; FRONTS |
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/19746 |
专题 | 气候变化 |
作者单位 | 1.Hirosaki Univ, Grad Sch Sci & Technol, Hirosaki, Aomori, Japan; 2.Tohoku Univ, Grad Sch Sci, Sendai, Miyagi, Japan |
推荐引用方式 GB/T 7714 | Shimada, Teruhisa,Kanno, Yuki,Iwasaki, Toshiki. Low-Level Cool Air over the Midlatitude Oceans in Summer[J]. JOURNAL OF CLIMATE,2018,31(5):2075-2090. |
APA | Shimada, Teruhisa,Kanno, Yuki,&Iwasaki, Toshiki.(2018).Low-Level Cool Air over the Midlatitude Oceans in Summer.JOURNAL OF CLIMATE,31(5),2075-2090. |
MLA | Shimada, Teruhisa,et al."Low-Level Cool Air over the Midlatitude Oceans in Summer".JOURNAL OF CLIMATE 31.5(2018):2075-2090. |
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