DOI: 10.1175/JCLI-D-13-00469.1
Scopus记录号: 2-s2.0-84902089849
论文题名: Low-level cloud response to the gulf stream front in winter using CALIPSO
作者: Liu J.-W. ; Xie S.-P. ; Norris J.R. ; Zhang S.-P.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 12 起始页码: 4421
结束页码: 4432
语种: 英语
Scopus关键词: Advection
; Boundary layers
; Sea level
; Wind
; Lidars/lidar observations
; Marine atmospheric boundary layer
; Marine boundary layers
; Near-surface instability
; Satellite observations
; Sea surface temperature fronts
; Secondary circulation
; Three-dimensional structure
; Ocean currents
; atmosphere-ocean coupling
; atmospheric circulation
; CALIPSO
; heat transfer
; satellite imagery
; sea level pressure
; sea surface temperature
; stream
; winter
; Atlantic Ocean
; Gulf Stream
英文摘要: A sharp sea surface temperature front develops between the warm water of the Gulf Stream and cold continental shelf water in boreal winter. This front has a substantial impact on the marine boundary layer. The present study analyzes and synthesizes satellite observations and reanalysis data to examine how the sea surface temperature front influences the three-dimensional structure of low-level clouds. The Cloud- Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite captures a sharp lowlevel cloud transition across the Gulf Stream front, a structure frequently observed under the northerly condition. Low-level cloud top (,4 km) increases by about 500m from the cold to the warm flank of the front. The sea surface temperature front induces a secondary low-level circulation through sea level pressure adjustment with ascending motion over the warm water and descending motion over cold water. The secondary circulation further contributes to the cross-frontal transition of low-level clouds. Composite analysis shows that surface meridional advection over the front plays an important role in the development of the marine atmospheric boundary layer and low-level clouds. Under cold northerly advection over the Gulf Stream front, strong near-surface instability leads to a well-mixed boundary layer over the Gulf Stream, causing southward deepening of low-level clouds across the sea surface temperature front. Moreover, the front affects the freezing level by transferring heat to the atmosphere and therefore influences the cross-frontal variation of the cloud phase. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51051
Appears in Collections: 气候变化事实与影响
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作者单位: Physical Oceanography Laboratory, and Ocean-Atmosphere Interaction and Climate Laboratory, Ocean University of China, 238, Songling Road, Qingdao 266100, China; Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States; International Pacific Research Center, Department of Meteorology, School of Ocean and Earth Science and Technology, University of Hawai'i at Manoa, Honolulu, United States
Recommended Citation:
Liu J.-W.,Xie S.-P.,Norris J.R.,et al. Low-level cloud response to the gulf stream front in winter using CALIPSO[J]. Journal of Climate,2014-01-01,27(12)