Further evidence for significant smoke transport from Africa to Amazonia

被引：57

作者：

Baars, H. ^{[1
]}

Ansmann, A. ^{[1
]}

Althausen, D. ^{[1
]}

Engelmann, R. ^{[1
]}

Artaxo, P. ^{[2
]}

Pauliquevis, T. ^{[3
]}

Souza, R. ^{[4
]}

机构：

[1] Leibniz Inst Tropospher Res, D-04318 Leipzig, Germany

[2] Univ Sao Paulo, Inst Phys, BR-05508090 Sao Paulo, Brazil

[3] Fed Univ Sao Paulo Diadema, Dept Earth & Nat Sci, BR-09972270 Diadema, SP, Brazil

[4] Univ State Amazonas, BR-69065020 Manaus, Amazonas, Brazil

来源：

GEOPHYSICAL RESEARCH LETTERS | 2011年 / 38卷

基金：

巴西圣保罗研究基金会;

关键词：

SAHARAN DUST; AEROSOL; OCEAN; BASIN;

D O I：

10.1029/2011GL049200

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Polarization-Raman-lidar observations of vertical aerosol profiles were performed 60 km north of Manaus, Brazil, in the Amazon rain forest during Amazonia's wet season from January to May 2008. Very clean background conditions with a mean AOD (532 nm) of 0.03 +/- 0.02 were frequently found. However, in about one third of all lidar measurements advection of smoke and dust aerosol from Africa were observed. The contribution of African smoke and Saharan dust particles to the total backscatter and extinction coefficient was determined by means of the measured particle depolarization ratio. A decreasing contribution of smoke particles to the total particle extinction coefficient from values around 60%-80% in January and February 2008, to values of 0%-50% in May 2008 was observed. Smoke-related extinction coefficients and optical depths up to 80 Mm(-1) and 0.15 at 532 nm, respectively, were recorded. Citation: Baars, H., A. Ansmann, D. Althausen, R. Engelmann, P. Artaxo, T. Pauliquevis, and R. Souza (2011), Further evidence for significant smoke transport from Africa to Amazonia, Geophys. Res. Lett., 38, L20802, doi:10.1029/2011GL049200.

引用

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