globalchange  > 影响、适应和脆弱性
DOI: 10.1002/jgrd.50484
论文题名:
Chemical characterization of individual particles and residuals of cloud droplets and ice crystals collected on board research aircraft in the ISDAC 2008 study
作者: Hiranuma N.; Brooks S.D.; Moffet R.C.; Glen A.; Laskin A.; Gilles M.K.; Liu P.; MacDonald A.M.; Strapp J.W.; McFarquhar G.M.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期:12
起始页码: 6564
结束页码: 6579
语种: 英语
英文关键词: aerosol ; cloud nuclei ; mixed phase ; residuals ; STXM
Scopus关键词: Carbonates ; Chemical industry ; Drops ; Research aircraft ; Scanning electron microscopy ; X ray absorption fine structure spectroscopy ; X rays ; Chemical characterization ; Computer controlled scanning electron microscopy ; Mixed phase ; Near edge x-ray absorption fine structure spectroscopies ; Organic carbon compounds ; residuals ; Scanning transmission x ray microscopy ; STXM ; Aerosols ; aerosol ; ambient air ; black carbon ; chemical composition ; cloud droplet ; episodic event ; experimental study ; ice crystal ; nucleation ; particle size ; physicochemical property ; sea salt ; Alaska ; Barrow ; United States
英文摘要: Ambient particles and the dry residuals of mixed-phase cloud droplets and ice crystals were collected during the Indirect and Semi-Direct Aerosol Campaign (ISDAC) near Barrow, Alaska, in spring of 2008. The collected particles were analyzed using Computer Controlled Scanning Electron Microscopy with Energy Dispersive X-ray analysis and Scanning Transmission X-ray Microscopy coupled with Near Edge X-ray Absorption Fine Structure spectroscopy to identify physico-chemical properties that differentiate cloud-nucleating particles from the total aerosol population. A wide range of individually mixed components was identified in the ambient particles and residuals including organic carbon compounds, inorganics, carbonates, and black carbon. Our results show that cloud droplet residuals differ from the ambient particles in both size and composition, suggesting that both properties may impact the cloud-nucleating ability of aerosols in mixed-phase clouds. The percentage of residual particles which contained carbonates (47%) was almost four times higher than those in ambient samples. Residual populations were also enhanced in sea salt and black carbon and reduced in organic compounds relative to the ambient particles. Further, our measurements suggest that chemical processing of aerosols may improve their cloud-nucleating ability. Comparison of results for various time periods within ISDAC suggests that the number and composition of cloud-nucleating particles over Alaska can be influenced by episodic events bringing aerosols from both the local vicinity and as far away as Siberia. Key Points Cloud droplet residuals differ from ambient particles in size and composition. Aerosol size and composition influence aerosol's ability to act as cloud nuclei. Sources of aerosol over Alaska include both local and long range sources. © 2013. 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/63621
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: Department of Atmospheric Sciences, Texas AandM University, 3150 TAMU, College Station, TX 77843-3150, United States; Institute for Meteorology and Climate Research, Atmospheric Aerosol Research, Karlsruhe Institute of Technology, Karlsruhe, Germany; Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Department of Chemistry, University of the Pacific, Stockton, CA, United States; W. R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, United States; Science and Technology Branch, Environment Canada, Toronto, CO, Canada; Department of Atmospheric Sciences, University of Illinois, Urbana, IL, United States

Recommended Citation:
Hiranuma N.,Brooks S.D.,Moffet R.C.,et al. Chemical characterization of individual particles and residuals of cloud droplets and ice crystals collected on board research aircraft in the ISDAC 2008 study[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(12)
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