globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2016JD025688
论文题名:
In situ measurements of water uptake by black carbon-containing aerosol in wildfire plumes
作者: Perring A.E.; Schwarz J.P.; Markovic M.Z.; Fahey D.W.; Jimenez J.L.; Campuzano-Jost P.; Palm B.D.; Wisthaler A.; Mikoviny T.; Diskin G.; Sachse G.; Ziemba L.; Anderson B.; Shingler T.; Crosbie E.; Sorooshian A.; Yokelson R.; Gao R.-S.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期:2
起始页码: 1086
结束页码: 1097
语种: 英语
英文关键词: aerosol ; biomass burning ; black carbon ; hygroscopicity ; SP2 ; water uptake
Scopus关键词: aerosol ; aerosol composition ; ammonium sulfate ; biomass burning ; black carbon ; cloud condensation nucleus ; hygroscopicity ; oxidation ; temporal evolution ; wildfire
英文摘要: Water uptake by black carbon (BC)-containing aerosol was quantified in North American wildfire plumes of varying age (1 to ~40 h old) sampled during the SEAC4RS mission (2013). A Humidified Dual SP2 (HD-SP2) is used to optically size BC-containing particles under dry and humid conditions from which we extract the hygroscopicity parameter, κ, of materials internally mixed with BC. Instrumental variability and the uncertainty of the technique are briefly discussed. An ensemble average κ of 0.04 is found for the set of plumes sampled, consistent with previous estimates of bulk aerosol hygroscopicity from biomass burning sources. The temporal evolution of κ in the Yosemite Rim Fire plume is explored to constrain the rate of conversion of BC-containing aerosol from hydrophobic to more hydrophilic modes in these emissions. A BC-specific κ increase of ~0.06 over 40 h is found, fit well with an exponential curve corresponding to a transition from a κ of 0 to a κ of ~0.09 with an e-folding time of 29 h. Although only a few percent of wildfire particles contain BC, a similar κ increase is estimated for bulk aerosol and the measured aerosol composition is used to infer that the observed κ change is driven by a combination of incorporation of ammonium sulfate and oxidation of existing organic materials. Finally, a substantial fraction of wildfire-generated BC-containing aerosol is calculated to be active as cloud condensation nuclei shortly after emission likely indicating efficient wet removal. These results can constrain model treatment of BC from wildfire sources. ©2016. American Geophysical Union. All Rights Reserved.
资助项目: NNX12AC03G ; NNX12AC10G ; NNX14AK79H ; NNX14AP75G ; NNX15AT96G
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62743
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: Chemical Sciences Division, NOAA Earth System Research Laboratory, Boulder, CO, United States; Cooperative Institute for Research in the Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; Now at Picarro Inc., Toronto, ON, Canada; Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, CO, United States; Department of Chemistry, University of Oslo, Oslo, Norway; Institute for Ion Physics and Applied Physics, University of Innsbruck, Innsbruck, Austria; NASA Langley Research Center, Hampton, VA, United States; Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, United States; Now at NASA Langley Research Center, Hampton, VA, United States; Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ, United States; Department of Chemistry, University of Montana, Missoula, MT, United States

Recommended Citation:
Perring A.E.,Schwarz J.P.,Markovic M.Z.,et al. In situ measurements of water uptake by black carbon-containing aerosol in wildfire plumes[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(2)
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