| DOI: | 10.1175/JCLI-D-17-0188.1
|
| Scopus记录号: | 2-s2.0-85041947872
|
| 论文题名: | Low-level cool air over the midlatitude oceans in summer |
| 作者: | Shimada T.; Kanno Y.; Iwasaki T.
|
| 刊名: | Journal of Climate
|
| ISSN: | 8948755
|
| 出版年: | 2018
|
| 卷: | 31, 期:5 | | 起始页码: | 2075
|
| 结束页码: | 2090
|
| 语种: | 英语
|
| 英文关键词: | Atmosphere-ocean interaction
; Atmosphere-ocean interaction
; Climatology
; Isentropic analysis
; Summer/warm season
|
| Scopus关键词: | Atmospheric thermodynamics
; Climatology
; Coastal engineering
; Heat flux
; Oceanography
; Adiabatic invariants
; Atmosphere-ocean interactions
; Isentropic analysis
; Northern Hemispheres
; Quantitative comparison
; Southern Hemisphere
; Summer/warm season
; Surface heat fluxes
; Air
; air mass
; air-sea interaction
; climatology
; cooling
; heating
; midlatitude environment
; quantitative analysis
; summer
; upwelling
; Indian Ocean
; Pacific Ocean
; Southern Ocean
|
| 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. © 2018 American Meteorological Society. |
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/111655
|
| Appears in Collections: | 气候减缓与适应
|
|
There are no files associated with this item.
|
|
作者单位: | Graduate School of Science and Technology, Hirosaki University, Hirosaki, Japan; Graduate School of Science, Tohoku University, Sendai, Japan
|
| Recommended Citation: | |
Shimada T.,Kanno Y.,Iwasaki T.. Low-level cool air over the midlatitude oceans in summer[J]. Journal of Climate,2018-01-01,31(5)
|
|
|