DOI: 10.1175/JCLI-D-14-00648.1
Scopus记录号: 2-s2.0-84937020898
论文题名: Subdiurnal stratocumulus cloud fraction variability and sensitivity to precipitation
作者: Burleyson C.D. ; Yuter S.E.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 8 起始页码: 2968
结束页码: 2985
语种: 英语
Scopus关键词: Boundary layers
; Clouds
; Cloud cover
; Diurnal effects
; Drizzle
; Marine boundary layers
; Stratiform clouds
; Precipitation (meteorology)
; boundary layer
; cloud cover
; diurnal variation
; drizzle
; marine atmosphere
; precipitation (climatology)
; sensitivity analysis
; Southern Hemisphere
; stratiform cloud
; stratocumulus
; Atlantic Ocean
; Pacific Ocean
英文摘要: This paper presents an analysis of subtropical marine stratocumulus cloud fraction variability using a 30-min and 3° × 3° cloud fraction dataset from 2003 to 2010. Each of the three subtropical marine stratocumulus regions has distinct diurnal characteristics, but the southeast (SE) Pacific and SE Atlantic are more similar to each other than to the northeast (NE) Pacific. The amplitude and season-to-season diurnal cycle variations are larger in the Southern Hemisphere regions than in the NE Pacific. Net overnight changes in cloud fraction on 3° × 3° scales are either positive or neutral > 77% of the time in the NE Pacific and > 88% of the time in the SE Pacific and SE Atlantic. Cloud fraction often increases to 100% by dawn when cloud fraction at dusk is > 30%. In the SE Pacific and SE Atlantic, a typical decrease in cloud area (median ≤ -5.7 × 105 km2) during the day is equivalent to 25% or more of the annual-mean cloud deck area. Time series for 3° × 3° areas where cloud fraction was ≥90% sometime overnight and < 60% at dawn, such as would result from nocturnal formation of pockets of open cells (POCs), only occur 1.5%, 1.6%, and 3.3% of the time in the SE Pacific, SE Atlantic, and NE Pacific, respectively. Comparison of cloud fraction changes to ship-based radar and satellite-derived precipitation intensity and area measurements shows a lack of sensitivity of cloud fraction to drizzle on time scales of 1-3 h and spatial scales of 100-300 km. © 2015 American Meteorological Society. 资助项目: CPO, Climate Program Office
; NASA, National Aeronautics and Space Administration
; NOAA, National Oceanic and Atmospheric Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50402
Appears in Collections: 气候变化事实与影响
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作者单位: North Carolina State University, Raleigh, NC, United States; Pacific Northwest National Laboratory, Richland, WA, United States
Recommended Citation:
Burleyson C.D.,Yuter S.E.. Subdiurnal stratocumulus cloud fraction variability and sensitivity to precipitation[J]. Journal of Climate,2015-01-01,28(8)