气候变化领域集成服务门户(CCPortal): Characterization and Evolution of Organized Shallow Convection in the Downstream North Atlantic Trades

CCPortal

DOI	10.1029/2021JD034575
	Characterization and Evolution of Organized Shallow Convection in the Downstream North Atlantic Trades
	Schulz H.; Eastman R.; Stevens B.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:17
英文摘要	Four previously identified patterns of meso-scale cloud organization in the trades — called Sugar, Gravel, Flowers, and Fish — are studied using long-term records of ground-based measurements, satellite observations and reanalyzes. A deep neural network trained to detect these patterns is applied to satellite imagery to identify periods during which a particular pattern is observed over the Barbados Cloud Observatory. Surface-based remote sensing at the observatory is composited and shows that the patterns can be distinguished by differences in cloud geometry. Variations in total cloudiness among the patterns are dominated by variations in cloud-top cloudiness. Cloud amount near cloud base varies little. Each pattern is associated with a distinct atmospheric environment whose characteristics are traced back to origins that are not solely within the trades. Sugar air-masses are characterized by weak winds and of tropical origin. Fish are driven by convergence lines originating from synoptical disturbances. Gravel and Flowers are most native to the trades, but distinguish themselves with slightly stronger winds and stronger subsidence in the first case and greater stability in the latter. The patterns with the higher cloud amounts and more negative cloud-radiative effects, Flowers and Fish, are selected by conditions expected to occur less frequently with greenhouse warming. © 2021. The Authors.
英文关键词	air-mass evolution; atmospheric thermodynamic structure; marine boundary layer; organization of shallow convection; remote sensing; trade wind cumuli
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237029
作者单位	Max Planck Institute for Meteorology, Hamburg, Germany; University of Washington, Seattle, WA, United States
推荐引用方式 GB/T 7714	Schulz H.,Eastman R.,Stevens B.. Characterization and Evolution of Organized Shallow Convection in the Downstream North Atlantic Trades[J],2021,126(17).
APA	Schulz H.,Eastman R.,&Stevens B..(2021).Characterization and Evolution of Organized Shallow Convection in the Downstream North Atlantic Trades.Journal of Geophysical Research: Atmospheres,126(17).
MLA	Schulz H.,et al."Characterization and Evolution of Organized Shallow Convection in the Downstream North Atlantic Trades".Journal of Geophysical Research: Atmospheres 126.17(2021).