TY - JOUR
T1 - Impact of clouds and aerosols on ozone production in Southeast Texas
AU - Flynn, James
AU - Lefer, Barry
AU - Rappenglück, Bernhard
AU - Leuchner, Michael
AU - Perna, Ryan
AU - Dibb, Jack
AU - Ziemba, Luke
AU - Anderson, Casey
AU - Stutz, Jochen
AU - Brune, William
AU - Ren, Xinrong
AU - Mao, Jingqiu
AU - Luke, Winston
AU - Olson, Jennifer
AU - Chen, Gao
AU - Crawford, James
N1 - Funding Information:
We would like to thank the Houston Advanced Research Center and the Texas Commission on Environmental Quality for their financial support. We would also like to thank the USDA-UVB monitoring program, Fong Ngan, Daewon Byun, and Mark Estes for providing assistance in data analysis and guidance.
PY - 2010/10
Y1 - 2010/10
N2 - A radiative transfer model and photochemical box model are used to examine the effects of clouds and aerosols on actinic flux and photolysis rates, and the impacts of changes in photolysis rates on ozone production and destruction rates in a polluted urban environment like Houston, Texas. During the TexAQS-II Radical and Aerosol Measurement Project the combined cloud and aerosol effects reduced j(NO2) photolysis frequencies by nominally 17%, while aerosols reduced j(NO2) by 3% on six clear sky days. Reductions in actinic flux due to attenuation by clouds and aerosols correspond to reduced net ozone formation rates with a nearly one-to-one relationship. The overall reduction in the net ozone production rate due to reductions in photolysis rates by clouds and aerosols was approximately 8 ppbv h-1.
AB - A radiative transfer model and photochemical box model are used to examine the effects of clouds and aerosols on actinic flux and photolysis rates, and the impacts of changes in photolysis rates on ozone production and destruction rates in a polluted urban environment like Houston, Texas. During the TexAQS-II Radical and Aerosol Measurement Project the combined cloud and aerosol effects reduced j(NO2) photolysis frequencies by nominally 17%, while aerosols reduced j(NO2) by 3% on six clear sky days. Reductions in actinic flux due to attenuation by clouds and aerosols correspond to reduced net ozone formation rates with a nearly one-to-one relationship. The overall reduction in the net ozone production rate due to reductions in photolysis rates by clouds and aerosols was approximately 8 ppbv h-1.
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U2 - 10.1016/j.atmosenv.2009.09.005
DO - 10.1016/j.atmosenv.2009.09.005
M3 - Article
AN - SCOPUS:77956497065
VL - 44
SP - 4126
EP - 4133
JO - Atmospheric Environment
JF - Atmospheric Environment
SN - 1352-2310
IS - 33
ER -