%0 Journal Article %1 Favez:2009p1798 %A Favez, Olivier %A Alfaro, Stephane C %A Sciare, Jean %A Cachier, Helene %A Abdelwahab, Magdy M %D 2009 %J Journal of Aerosol Science %K Absorption, Aerosol Aerosols, Aethalometer, Agricultural Biomass, Black Burning, Cairo Campaign, Carbon Carbon, Carbonaceous Light Megacity, Nephelometer, Optical-Properties, Organic/Brown Particles, Rice Straw, Waste %N 7 %P 613--620 %R 10.1016/j.jaerosci.2009.04.002 %T Ambient measurements of light-absorption by agricultural waste burning organic aerosols %U http://www.google.com/search?client=safari&rls=en-us&q=Ambient+measurements+of+light-absorption+by+agricultural+waste+burning+organic+aerosols&ie=UTF-8&oe=UTF-8 %V 40 %X Absorption properties (absorption Angstrom exponent and mass absorption efficiency) of agricultural waste burning organic aerosols (AWB-OA) and their impact on total absorption were investigated in Cairo (Egypt) during the post-harvest rice straw burning autumn season. At 370 nm, AWB-OA were found to account for more than 25% of total absorption on average for the period of study (and for similar to 50% during intense biomass burning events), pointing out the major role potentially played by such particles on light absorption at short wavelengths. The absorption exponent obtained for AWB-OA (similar to 3.5) is consistent with values previously reported for biomass burning brown carbon. In addition, AWB-OA were found to exhibit high mass absorption efficiencies at the near ultraviolet/mid-visible regions (e.g. 3.2 +/- 1.6 m(2) g(-1) at 370 nm and 0.8 +/- 0.4 m(2) g(-1) at 520 nm). Such findings clearly illustrate the need to take light absorption by organic aerosols into account for a better estimate of the radiative impact of biomass burning aerosols. (C) 2009 Elsevier Ltd. All rights reserved.

@article{Favez:2009p1798, abstract = {Absorption properties (absorption Angstrom exponent and mass absorption efficiency) of agricultural waste burning organic aerosols (AWB-OA) and their impact on total absorption were investigated in Cairo (Egypt) during the post-harvest rice straw burning autumn season. At 370 nm, AWB-OA were found to account for more than 25% of total absorption on average for the period of study (and for similar to 50% during intense biomass burning events), pointing out the major role potentially played by such particles on light absorption at short wavelengths. The absorption exponent obtained for AWB-OA (similar to 3.5) is consistent with values previously reported for biomass burning brown carbon. In addition, AWB-OA were found to exhibit high mass absorption efficiencies at the near ultraviolet/mid-visible regions (e.g. 3.2 +/- 1.6 m(2) g(-1) at 370 nm and 0.8 +/- 0.4 m(2) g(-1) at 520 nm). Such findings clearly illustrate the need to take light absorption by organic aerosols into account for a better estimate of the radiative impact of biomass burning aerosols. (C) 2009 Elsevier Ltd. All rights reserved.}, added-at = {2010-06-22T19:38:37.000+0200}, affiliation = {Lab CEA CNRS UVSQ, LSCE, IPSL, F-91191 Gif Sur Yvette, France}, author = {Favez, Olivier and Alfaro, Stephane C and Sciare, Jean and Cachier, Helene and Abdelwahab, Magdy M}, biburl = {https://www.bibsonomy.org/bibtex/2fd5fec0550569e66aaf14581b153dd27/gsmith}, date-added = {2010-03-11 10:17:30 -0500}, date-modified = {2010-03-11 10:18:39 -0500}, doi = {10.1016/j.jaerosci.2009.04.002}, interhash = {d69e58f80dc07232ee6f99998921b288}, intrahash = {fd5fec0550569e66aaf14581b153dd27}, journal = {Journal of Aerosol Science}, keywords = {Absorption, Aerosol Aerosols, Aethalometer, Agricultural Biomass, Black Burning, Cairo Campaign, Carbon Carbon, Carbonaceous Light Megacity, Nephelometer, Optical-Properties, Organic/Brown Particles, Rice Straw, Waste}, language = {English}, local-url = {file://localhost/Users/geoffreysmith/Documents/Papers/Journal%20of%20Aerosol%20Science/2009/Journal%20of%20Aerosol%20Science,%2040,%20613-620%202009.pdf}, month = Jan, number = 7, pages = {613--620}, pmid = {000267559300006}, rating = {0}, timestamp = {2010-06-22T19:38:39.000+0200}, title = {Ambient measurements of light-absorption by agricultural waste burning organic aerosols}, uri = {papers://E88B624E-D406-46FF-9D95-BB9C1AAE3FDC/Paper/p1798}, url = {http://www.google.com/search?client=safari&rls=en-us&q=Ambient+measurements+of+light-absorption+by+agricultural+waste+burning+organic+aerosols&ie=UTF-8&oe=UTF-8}, volume = 40, year = 2009 }