DOI: 10.1175/JCLI-D-15-0768.1
Scopus记录号: 2-s2.0-84993995769
论文题名: What is the role of sea surface temperature in modulating cloud and precipitation properties over the Southern Ocean?
作者: Huang Y. ; Siems S.T. ; Manton M.J. ; Rosenfeld D. ; Marchand R. ; McFarquhar G.M. ; Protat A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 20 起始页码: 7453
结束页码: 7476
语种: 英语
Scopus关键词: Aerosols
; Atmospheric temperature
; Boundary layers
; Clouds
; Liquids
; Particle size
; Precipitation (meteorology)
; Submarine geophysics
; Supercooling
; Surface properties
; Surface waters
; Air sea interactions
; Cloud microphysics
; Cloud retrieval
; Precipitation characteristics
; Precipitation properties
; Satellite observations
; Sea surface temperature (SST)
; Supercooled liquid water
; Oceanography
; aerosol
; air-sea interaction
; boundary layer
; climate effect
; cloud cover
; cloud microphysics
; optical depth
; precipitation assessment
; satellite data
; sea surface temperature
; Southern Ocean
英文摘要: This study employs four years of spatiotemporally collocated A-Train satellite observations to investigate cloud and precipitation characteristics in relation to the underlying properties of the Southern Ocean (SO). Results show that liquid-phase cloud properties strongly correlate with the sea surface temperature (SST). In summer, ubiquitous supercooled liquid water (SLW) is observed over SSTs less than about 4°C. Cloud-top temperature (CTT) and effective radius of liquid-phase clouds generally decrease for colder SSTs, whereas the opposite trend is observed for cloud-top height, cloud optical thickness, and liquid water path. The deduced cloud depth is larger over the colder oceans. Notable differences are observed between "precipitating" and "nonprecipitating" clouds and between different ocean sectors. Using a novel joint SST-CTT histogram, two distinct liquid-phase cloud types are identified, where the retrieved particle size appears to increase with decreasing CTT over warmer water (SSTs >~7°C), while the opposite is true over colder water. A comparison with the Northern Hemisphere (NH) storm-track regions suggests that the ubiquitous SLW with markedly smaller droplet size is a unique feature for the cold SO (occurring where SSTs <~4°C), while the presence of this cloud type is much less frequent over the NH counterparts, where the SSTs are rarely colder than about 4°C at any time of the year. This study also suggests that precipitation, which has a profound influence on cloud properties, remains poorly observed over the SO with the current spaceborne sensors. Large uncertainties in precipitation properties are associated with the ubiquitous boundary layer clouds within the lowest kilometer of the atmosphere. © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50067
Appears in Collections: 气候变化事实与影响
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作者单位: School of Earth, Atmosphere and Environment, Monash University, Melbourne, VIC, Australia; Australian Research Council Centre of Excellence for Climate System Science, Monash University, Melbourne, VIC, Australia; Institute of Earth Sciences, Hebrew University, Jerusalem, Israel; Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Department of Atmospheric Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States; Australian Bureau of Meteorology, Melbourne, VIC, Australia
Recommended Citation:
Huang Y.,Siems S.T.,Manton M.J.,et al. What is the role of sea surface temperature in modulating cloud and precipitation properties over the Southern Ocean?[J]. Journal of Climate,2016-01-01,29(20)