globalchange  > 科学计划与规划
DOI: 10.1002/2015GL063897
论文题名:
Evolution of brown carbon in wildfire plumes
作者: Forrister H.; Liu J.; Scheuer E.; Dibb J.; Ziemba L.; Thornhill K.L.; Anderson B.; Diskin G.; Perring A.E.; Schwarz J.P.; Campuzano-Jost P.; Day D.A.; Palm B.B.; Jimenez J.L.; Nenes A.; Weber R.J.
刊名: Geophysical Research Letters
ISSN: 0094-9585
EISSN: 1944-9316
出版年: 2015
卷: 42, 期:11
起始页码: 4623
结束页码: 4630
语种: 英语
英文关键词: biomass burning ; bleaching ; brown carbon ; lifetime ; photooxidation ; plume evolution
Scopus关键词: Aerosols ; Bleaching ; Electromagnetic wave absorption ; Fires ; Light absorption ; NASA ; Photooxidation ; Thickness measurement ; Aerosol light absorption ; Atmospheric stability ; Biomass-burning ; Brown carbons ; Coating thickness ; Lifetime ; Mass concentration ; Plume evolution ; Atmospheric movements
英文摘要: Particulate brown carbon (BrC) in the atmosphere absorbs light at subvisible wavelengths and has poorly constrained but potentially large climate forcing impacts. BrC from biomass burning has virtually unknown lifecycle and atmospheric stability. Here, BrC emitted from intense wildfires was measured in plumes transported over 2 days from two main fires, during the 2013 NASA SEAC4RS mission. Concurrent measurements of organic aerosol (OA) and black carbon (BC) mass concentration, BC coating thickness, absorption Ångström exponent, and OA oxidation state reveal that the initial BrC emitted from the fires was largely unstable. Using back trajectories to estimate the transport time indicates that BrC aerosol light absorption decayed in the plumes with a half-life of 9 to 15 h, measured over day and night. Although most BrC was lost within a day, possibly through chemical loss and/or evaporation, the remaining persistent fraction likely determines the background BrC levels most relevant for climate forcing. ©2015. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84934441835&doi=10.1002%2f2015GL063897&partnerID=40&md5=40dbd64ff03b5936255d1fd5a0af52e4
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9200
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States

Recommended Citation:
Forrister H.,Liu J.,Scheuer E.,et al. Evolution of brown carbon in wildfire plumes[J]. Geophysical Research Letters,2015-01-01,42(11).
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