Characterization of the Nashville urban plume on July 3 and July 18, 1995 L. J. Nunnennacker, D. Imre, P.H. Daum, L. Kleinman, 1 Y.-N. Lee, J. H. Lee,
Characterization of the Nashville urban plume on July 3 and July 18, 1995 L. J. Nunnennacker, D. Imre, P.H. Daum, L. Kleinman, 1 Y.-N. Lee, J. H. Lee,
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DOI：
10.1029/98jd01961
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发表时间：
1998-11
期刊：
影响因子：
--
通讯作者：
L. Nunnermacker;Dan G. Imre;P. Daum;L. Kleinman;Y. N. Lee;J. H. Lee;S. Springston;L. Newman
中科院分区：
文献类型：
--
作者：
L. Nunnermacker;Dan G. Imre;P. Daum;L. Kleinman;Y. N. Lee;J. H. Lee;S. Springston;L. Newman
This paper reports results from the Southern Oxidants Study field campaign designed to characterize the formation and distribution of ozone and related species in the Nashville urban region. Data from several airborne platforms as well as surface observations on July 3 and 18 are examined to gain insight into the factors that control O{sub 3} formation rates and concentrations in the regional plumes. On both days, well-defined urban and power plant plumes were sampled. Utilizing both aircraft and surface data, a detailed kinetic analysis of the chemical evolution of the urban plume is performed to derive NO{sub x} lifetime, ozone production efficiency, OH concentration, HNO{sub 3} dry deposition rate, and the relative importance of natural and anthropogenic hydrocarbons to O{sub 3} production. Analysis of the urban plume data revealed a very active photochemical system (average [OH]{approximately}1.2{times}10{sup 7}hmoleculeshcm{sup {minus}3}) which consumed 50{percent} of the NO{sub x} within approximately 2 hours, at an ozone production efficiency of 2.5 to 4 molecules for each molecule of NO{sub x}. Anthropogenic hydrocarbons provided approximately 44{percent} of the fuel for ozone production by the urban plume. The dry deposition rate for HNO{sub 3} in the urban plume was estimated to be of the order of 5more » to 7 cmhs{sup {minus}1}. {copyright} 1998 American Geophysical Union« less
This paper reports results from the Southern Oxidants Study field campaign designed to characterize the formation and distribution of ozone and related species in the Nashville urban region. Data from several airborne platforms as well as surface observations on July 3 and 18 are examined to gain insight into the factors that control O{sub 3} formation rates and concentrations in the regional plumes. On both days, well-defined urban and power plant plumes were sampled. Utilizing both aircraft and surface data, a detailed kinetic analysis of the chemical evolution of the urban plume is performed to derive NO{sub x} lifetime, ozone production efficiency, OH concentration, HNO{sub 3} dry deposition rate, and the relative importance of natural and anthropogenic hydrocarbons to O{sub 3} production. Analysis of the urban plume data revealed a very active photochemical system (average [OH]{approximately}1.2{times}10{sup 7}hmoleculeshcm{sup {minus}3}) which consumed 50{percent} of the NO{sub x} within approximately 2 hours, at an ozone production efficiency of 2.5 to 4 molecules for each molecule of NO{sub x}. Anthropogenic hydrocarbons provided approximately 44{percent} of the fuel for ozone production by the urban plume. The dry deposition rate for HNO{sub 3} in the urban plume was estimated to be of the order of 5more » to 7 cmhs{sup {minus}1}. {copyright} 1998 American Geophysical Union« less