globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2015JD024595
论文题名:
Meteorological and aerosol effects on marine cloud microphysical properties
作者: Sanchez K.J.; Russell L.M.; Modini R.L.; Frossard A.A.; Ahlm L.; Corrigan C.E.; Roberts G.C.; Hawkins L.N.; Schroder J.C.; Bertram A.K.; Zhao R.; Lee A.K.Y.; Lin J.J.; Nenes A.; Wang Z.; Wonaschütz A.; Sorooshian A.; Noone K.J.; Jonsson H.; Toom D.; Macdonald A.M.; Leaitch W.R.; Seinfeld J.H.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2016
卷: 121, 期:8
起始页码: 4142
结束页码: 4161
语种: 英语
英文关键词: aerosol ; cloud reflectivity ; hygroscopicity ; lapse rate ; spectral width
英文摘要: Meteorology and microphysics affect cloud formation, cloud droplet distributions, and shortwave reflectance. The Eastern Pacific Emitted Aerosol Cloud Experiment and the Stratocumulus Observations of Los-Angeles Emissions Derived Aerosol-Droplets studies provided measurements in six case studies of cloud thermodynamic properties, initial particle number distribution and composition, and cloud drop distribution. In this study, we use simulations from a chemical and microphysical aerosol-cloud parcel (ACP) model with explicit kinetic drop activation to reproduce observed cloud droplet distributions of the case studies. Four cases had subadiabatic lapse rates, resulting in fewer activated droplets, lower liquid water content, and higher cloud base height than an adiabatic lapse rate. A weighted ensemble of simulations that reflect measured variation in updraft velocity and cloud base height was used to reproduce observed droplet distributions. Simulations show that organic hygroscopicity in internally mixed cases causes small effects on cloud reflectivity (CR) (<0.01), except for cargo ship and smoke plumes, which increased CR by 0.02 and 0.07, respectively, owing to their high organic mass fraction. Organic hygroscopicity had larger effects on droplet concentrations for cases with higher aerosol concentrations near the critical diameter (namely, polluted cases with a modal peak near 0.1 μm). Differences in simulated droplet spectral widths (k) caused larger differences in CR than organic hygroscopicity in cases with organic mass fractions of 60% or less for the cases shown. Finally, simulations from a numerical parameterization of cloud droplet activation suitable for general circulation models compared well with the ACP model, except under high organic mass fraction. ©2016. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62908
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Scripps Institution of Oceanography, University of California, San Diego, San Diego, CA, United States; École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland; Now at Department of Chemistry, University of California, Berkeley, CA, United States; Centre National de la Recherche Scientifique-Groupe d'Etudes de l'Atmosphere Meteorologique, Toulouse, France; Department of Chemistry, Harvey Mudd College, Claremont, CA, United States; Department of Chemistry, University of British Columbia, Vancouver, BC, Canada; Department of Chemistry and Biochemistry, CIRES, University of Colorado Boulder, Boulder, CO, United States; Department of Chemistry, University of Toronto, Toronto, ON, Canada; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States; School of Earth and Atmospheric Sciences, School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, United States; Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, United States; Faculty of Physics, University of Vienna, Vienna, Austria; Department of Environmental Science and Analytical Chemistry, Stockholm University, Stockholm, Sweden; Center for Interdisciplinary Remotely-Piloted Aerosol Studies, Marina, CA, United States; Science and Technology Branch, Environment Canada, Toronto, ON, Canada; Department of Chemical Engineering, California Institute of Technology, Pasadena, CA, United States

Recommended Citation:
Sanchez K.J.,Russell L.M.,Modini R.L.,et al. Meteorological and aerosol effects on marine cloud microphysical properties[J]. Journal of Geophysical Research: Atmospheres,2016-01-01,121(8)
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