DOI: 10.1029/2012JD018218
论文题名: Modeling aerosols and their interactions with shallow cumuli during the 2007 CHAPS field study
作者: Shrivastava M. ; Berg L.K. ; Fast J.D. ; Easter R.C. ; Laskin A. ; Chapman E.G. ; Gustafson Jr. W.I. ; Liu Y. ; Berkowitz C.M.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 3 起始页码: 1343
结束页码: 1360
语种: 英语
英文关键词: aerosol
; CHAPS
; clouds
; modeling
; shallow cumuli
; WRF-Chem
Scopus关键词: Clouds
; Drops
; Models
; Nitrates
; Vapors
; Weather forecasting
; Aerosol mass spectrometers
; Aerosol optical property
; CHAPS
; Cloud droplet number concentrations
; Shallow cumulus
; Single scattering albedo
; Weather research and forecasting models
; WRF-Chem
; Aerosols
; aerosol
; chemical composition
; field method
; nitrate
; numerical model
; optical property
; plume
; pollution monitoring
; regional pattern
; simulation
; Illinois
; Oklahoma [United States]
; United States
; Urbana
英文摘要: The Weather Research and Forecasting model coupled with chemistry, using 2 km horizontal grid spacing, is used to simulate two important relationships between aerosols and clouds in the vicinity of Oklahoma City during the June 2007 Cumulus Humilis Aerosol Processing Study (CHAPS). First, the model reproduces the trends of higher nitrate volume fractions in cloud droplet residuals compared to interstitial nonactivated aerosols, as measured using an aerosol mass spectrometer. Comparing simulations with cloud chemistry turned on and off, we show that nitric acid vapor uptake by cloud droplets explains the higher nitrate content of cloud droplet residuals. Second, the model reasonably represents the observations of the first aerosol indirect effect where pollutants in the vicinity of Oklahoma City increase cloud droplet number concentrations and decrease the droplet effective radius. In addition, as documented using an offline optical code, simulated aerosol optical properties depend on several compensating effects including aerosol water content, size-resolved chemical composition, and refractory index of various particle chemical species. All of our four sensitivity test cases clearly show an increase in simulated absorption and a decrease in single scattering albedo within the Oklahoma City plume relative to conditions outside the plume. While previous studies have often focused on cloud-aerosol interactions in stratiform and deep convective clouds, this study highlights the ability of regional-scale models to represent some of the important aspects of cloud-aerosol interactions associated with fields of short-lived shallow cumuli. ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63938
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99352, United States; W. R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, United States
Recommended Citation:
Shrivastava M.,Berg L.K.,Fast J.D.,et al. Modeling aerosols and their interactions with shallow cumuli during the 2007 CHAPS field study[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(3)