High aerosol optical depth biomass burning events: A comparison of optical properties for different source regions

被引:175
作者
Eck, TF
Holben, BN
Reid, JS
O'Neill, NT
Schafer, JS
Dubovik, O
Smirnov, A
Yamasoe, MA
Artaxo, P
机构
[1] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[2] Univ Maryland Baltimore Cty, Goddard Earth Sci & Technol Ctr, Baltimore, MD 21228 USA
[3] USN, Marine Meteorol Div, Res Lab, Monterey, CA 93943 USA
[4] Univ Sherbrooke, CARTEL, Sherbrooke, PQ J1K 2R1, Canada
[5] Sci Syst & Applicat Inc, Lanham, MD USA
[6] Univ Sao Paulo, Sao Paulo, Brazil
关键词
D O I
10.1029/2003GL017861
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
[1] The optical properties of aerosols such as smoke from biomass burning vary due to aging processes and these particles reach larger sizes at high concentrations. We compare the spectra of aerosol optical depth (tau(a)), column-integrated volume size distributions, refractive indices, and single scattering albedo retrieved from AERONET observations for four selected events of very high smoke optical depth (tau(a) similar to 2 at 500 nm). Two case studies are from tropical biomass burning regions ( Brazil and Zambia) and two are cases of boreal forest and peat fire smoke transported long distances to sites in the US and Moldova. Smoke properties for these extreme events can be significantly different from those reported in more typical plumes. In particular, large differences in smoke fine mode particle radius ( similar to 0.17 to 0.25 mum) and single scattering albedo ( similar to 0.88 to 0.99 at 440 nm) were observed as a result of differences in fuels burned, combustion phase, and aging.
引用
收藏
页码:ASC4 / 1
页数:4
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