DOI: 10.1002/jgrd.50242
论文题名: Thermodynamic structure and evolution of the atmospheric mixed layer over the western North Pacific during the summer monsoon onset
作者: Geng B. ; Yoneyama K. ; Shirooka R.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 11 起始页码: 5655
结束页码: 5666
语种: 英语
英文关键词: atmospheric mixed layer
; monsoon onset
Scopus关键词: Atmospheric structure
; Buoyancy
; Ships
; Subsidence
; Mixed layer
; Monsoon onset
; Positive correlations
; Research vessels
; Surface buoyancy flux
; Thermodynamic structures
; Western North Pacific
; Western north pacific summer monsoons
; Atmospheric thermodynamics
; buoyancy
; correlation
; data acquisition
; mixed layer
; monsoon
; sea surface
; subsidence
; summer
; surface water
; thermodynamics
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: This study examined the thermodynamic structure of the atmospheric mixed layer and its evolution in different periods during the onset of the western North Pacific summer monsoon by using data observed on board the research vessel Mirai at 12°N and 135°E during 6-24 June 2008. The overall mean depth of the mixed layer was 482 m, and the mixed layer tended to shrink after the monsoon onset. The mixed layer was relatively warm and moist during the early onset period. However, the mixed layer became very cool and dry during the latter onset period, when intense and sustained rainfall was observed. The surface buoyancy flux, environmental subsidence over the mixed layer, and upward motion at cloud base intensified after the monsoon onset. All of these factors were negatively correlated with the depth of the mixed layer, which implies that the upward motion at cloud base and compensating environmental subsidence act to suppress the growth of the mixed layer driven by buoyancy forcing and to shrink the mixed layer after the monsoon onset. A significant positive correlation existed between the surface buoyancy flux and the upward motion at cloud base after the monsoon onset. Such positive feedback between the sea surface and cumulus clouds facilitates the formation of the warmer and moister mixed layer during the early onset period, thereby benefiting the further development of the monsoon onset. © 2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63699
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology, 2-15 Natsushima, Yokosuka 237-0061, Japan
Recommended Citation:
Geng B.,Yoneyama K.,Shirooka R.. Thermodynamic structure and evolution of the atmospheric mixed layer over the western North Pacific during the summer monsoon onset[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(11)