DOI: 10.1029/2017JD027865
Scopus记录号: 2-s2.0-85052944271
论文题名: CCN Spectral Shape and Stratus Cloud and Drizzle Microphysics
作者: Hudson J.G. ; Noble S. ; Tabor S.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 17 起始页码: 9635
结束页码: 9651
语种: 英语
英文关键词: CCN
; clouds
; drizzle
英文摘要: The shapes of high-resolution cloud condensation nucleus (CCN) spectra are compared with cloud and precipitation characteristics observed in the Marine Stratus/Stratocumulus Experiment. These high-resolution spectra often revealed bimodality that is usually caused by in-cloud processing. Bimodal CCN spectra were associated with clouds that had as much as double the concentrations of droplets with narrower distributions and as much as an order of magnitude less drizzle than clouds associated with the most extreme unimodal CCN spectra. We introduce objective CCN spectral metrics: (1) CCN concentration differences between the two modes, unprocessed (Aitken, Nu) and processed (accumulation, Np), and (2) slopes of cumulative CCN spectra. Both of these CCN spectral shape classifications show similar cloud droplet concentration (Nc) trends to that of an earlier subjective modal rating system. When there are two modes, they are separated either by minimal concentrations or concentration inflections. Enhancement of Nc is traced to greater CCN bimodality that causes narrower droplet spectra that suppress drizzle. These effects could augment indirect aerosol effects and can only be revealed by high-resolution CCN spectral shape comparisons with cloud and drizzle microphysics. ©2018. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113166
Appears in Collections: 气候减缓与适应
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作者单位: Desert Research Institute, Reno, NV, United States; Savannah River National Laboratory, Aitken, SC, United States; Fleet Numerical Meteorology and Oceanography Center (FNMOC), Monterey, CA, United States
Recommended Citation:
Hudson J.G.,Noble S.,Tabor S.. CCN Spectral Shape and Stratus Cloud and Drizzle Microphysics[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(17)