Investigation of Vertical Profiles of Meteorological Parameters and Ozone Concentration in the Mexico City Metropolitan Area
In the Mexico City Metropolitan Area (MCMA), ozone (O3) concentration is still higher than in other urban areas in developed countries. In order to reveal the current state of photochemical air pollution and to provide data for validation of chemical transport models, vertical profiles of meteorolog...
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doaj-b197cef54c4649dea3eeb318c01f5f7d2020-11-25T02:24:33ZengAsian Association for Atmospheric EnvironmentAsian Journal of Atmospheric Environment1976-69122287-11602015-06-019211412710.5572/ajae.2015.9.2.114Investigation of Vertical Profiles of Meteorological Parameters and Ozone Concentration in the Mexico City Metropolitan AreaSandy E. Benitez-Garcia0Isao Kanda1Yukiyo Okazaki2Shinji Wakamatsu3Roberto Basaldud4Nobuji Horikoshi5Jose A. Ortinez6Victor R. Ramos-Benitez7Beatriz Cardenas8United Graduate School of Agricultural Sciences, Ehime University, 3-5-7 Tarumi, Matsuyama, Ehime 790-8566, Japan)Faculty of Agriculture, Ehime University, 3-5-7 Tarumi, Matsuyama, Ehime 790-8566, JapanFaculty of Agriculture, Ehime University, 3-5-7 Tarumi, Matsuyama, Ehime 790-8566, JapanFaculty of Agriculture, Ehime University, 3-5-7 Tarumi, Matsuyama, Ehime 790-8566, JapanNational Institute of Ecology and Climate Change (INECC), Periférico 5000, Col. Insurgentes Cuicuilco, Delegación Coyoacán, D.F., MexicoMeteoric Research Inc., 245-8 Uratakao, Hachiouji, Tokyo 193-0841, JapanNational Institute of Ecology and Climate Change (INECC), Periférico 5000, Col. Insurgentes Cuicuilco, Delegación Coyoacán, D.F., MexicoNational Weather Service (SMN), Av. Observatorio 192, Col. Observatorio, Del. Miguel Hidalgo, D.F., MexicoNational Institute of Ecology and Climate Change (INECC), Periférico 5000, Col. Insurgentes Cuicuilco, Delegación Coyoacán, D.F., MexicoIn the Mexico City Metropolitan Area (MCMA), ozone (O3) concentration is still higher than in other urban areas in developed countries. In order to reveal the current state of photochemical air pollution and to provide data for validation of chemical transport models, vertical profiles of meteorological parameters and ozone concentrations were measured by ozonesonde in two field campaigns: the first one, during the change of season from wet to dry-cold (November 2011) and the second during the dry-warm season (March 2012). Unlike previous similar field campaigns, ozonesonde was launched twice daily. The observation data were used to analyze the production and distribution of ozone in the convective boundary layer. The observation days covered a wide range of meteorological conditions, and various profiles were obtained. The evolution of the mixing layer (ML) height was analyzed, revealing that ML evolution was faster during daytime in March 2012 than in November 2011. On a day in November 2011, the early-morning strong wind and the resulting vertical mixing was observed to have brought the high-ozone-concentration air-mass to the ground and caused relatively high surface ozone concentration in the morning. The amount of produced ozone in the MCMA was estimated by taking the difference between the two profiles on each day. In addition to the well-known positive correlation between daily maximum temperature and ozone production, effect of the ML height and wind stagnation was identified for a day in March 2012 when the maximum ground-level ozone concentration was observed during the two field campaigns. The relatively low ventilation coefficient in the morning and the relatively high value in the afternoon on this day implied efficient accumulation of the O3 precursors and rapid production of O3 in the ML.http://asianjae.org/_common/do.php?a=full&b=11&bidx=1539&aidx=19495field campaignozoneozonesondemexico city metropolitan areamixing layer |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Sandy E. Benitez-Garcia Isao Kanda Yukiyo Okazaki Shinji Wakamatsu Roberto Basaldud Nobuji Horikoshi Jose A. Ortinez Victor R. Ramos-Benitez Beatriz Cardenas |
spellingShingle |
Sandy E. Benitez-Garcia Isao Kanda Yukiyo Okazaki Shinji Wakamatsu Roberto Basaldud Nobuji Horikoshi Jose A. Ortinez Victor R. Ramos-Benitez Beatriz Cardenas Investigation of Vertical Profiles of Meteorological Parameters and Ozone Concentration in the Mexico City Metropolitan Area Asian Journal of Atmospheric Environment field campaign ozone ozonesonde mexico city metropolitan area mixing layer |
author_facet |
Sandy E. Benitez-Garcia Isao Kanda Yukiyo Okazaki Shinji Wakamatsu Roberto Basaldud Nobuji Horikoshi Jose A. Ortinez Victor R. Ramos-Benitez Beatriz Cardenas |
author_sort |
Sandy E. Benitez-Garcia |
title |
Investigation of Vertical Profiles of Meteorological Parameters and Ozone Concentration in the Mexico City Metropolitan Area |
title_short |
Investigation of Vertical Profiles of Meteorological Parameters and Ozone Concentration in the Mexico City Metropolitan Area |
title_full |
Investigation of Vertical Profiles of Meteorological Parameters and Ozone Concentration in the Mexico City Metropolitan Area |
title_fullStr |
Investigation of Vertical Profiles of Meteorological Parameters and Ozone Concentration in the Mexico City Metropolitan Area |
title_full_unstemmed |
Investigation of Vertical Profiles of Meteorological Parameters and Ozone Concentration in the Mexico City Metropolitan Area |
title_sort |
investigation of vertical profiles of meteorological parameters and ozone concentration in the mexico city metropolitan area |
publisher |
Asian Association for Atmospheric Environment |
series |
Asian Journal of Atmospheric Environment |
issn |
1976-6912 2287-1160 |
publishDate |
2015-06-01 |
description |
In the Mexico City Metropolitan Area (MCMA), ozone (O3) concentration is still higher than in other urban areas in developed countries. In order to reveal the current state of photochemical air pollution and to provide data for validation of chemical transport models, vertical profiles of meteorological parameters and ozone concentrations were measured by ozonesonde in two field campaigns: the first one, during the change of season from wet to dry-cold (November 2011) and the second during the dry-warm season (March 2012). Unlike previous similar field campaigns, ozonesonde was launched twice daily. The observation data were used to analyze the production and distribution of ozone in the convective boundary layer. The observation days covered a wide range of meteorological conditions, and various profiles were obtained. The evolution of the mixing layer (ML) height was analyzed, revealing that ML evolution was faster during daytime in March 2012 than in November 2011. On a day in November 2011, the early-morning strong wind and the resulting vertical mixing was observed to have brought the high-ozone-concentration air-mass to the ground and caused relatively high surface ozone concentration in the morning. The amount of produced ozone in the MCMA was estimated by taking the difference between the two profiles on each day. In addition to the well-known positive correlation between daily maximum temperature and ozone production, effect of the ML height and wind stagnation was identified for a day in March 2012 when the maximum ground-level ozone concentration was observed during the two field campaigns. The relatively low ventilation coefficient in the morning and the relatively high value in the afternoon on this day implied efficient accumulation of the O3 precursors and rapid production of O3 in the ML. |
topic |
field campaign ozone ozonesonde mexico city metropolitan area mixing layer |
url |
http://asianjae.org/_common/do.php?a=full&b=11&bidx=1539&aidx=19495 |
work_keys_str_mv |
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