Diagnosis of ozone formation sensitivity in the Mexico City Metropolitan Area using HCHO/NO2 column ratios from the ozone monitoring instrument

The formation of tropospheric ozone is influenced by emissions of volatile organic compounds (VOCs) and nitrogen oxides (NOx), and different regimes of sensitivity to the ozone formation have been identified depending on the concentrations of both groups of compounds. We studied the ozone formation...

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Autores principales:	Jairo Vazquez Santiago, Kazuya Inoue, Kenichi Tonokura
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Formaldehyde Nitrogen dioxide Ozone formation sensitivity Ozone monitoring instrument Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/769fa5b5deb548e685e67be76c64f1f7
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spelling	oai:doaj.org-article:769fa5b5deb548e685e67be76c64f1f72021-12-02T05:04:16ZDiagnosis of ozone formation sensitivity in the Mexico City Metropolitan Area using HCHO/NO2 column ratios from the ozone monitoring instrument2666-765710.1016/j.envadv.2021.100138https://doaj.org/article/769fa5b5deb548e685e67be76c64f1f72021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666765721001095https://doaj.org/toc/2666-7657The formation of tropospheric ozone is influenced by emissions of volatile organic compounds (VOCs) and nitrogen oxides (NOx), and different regimes of sensitivity to the ozone formation have been identified depending on the concentrations of both groups of compounds. We studied the ozone formation sensitivity in the Mexico City Metropolitan Area (MCMA) using the formaldehyde to nitrogen dioxide ratio (FNR) as a proxy for the VOCs and NOx concentrations, with data retrieved from the Ozone Monitoring Instrument (OMI). To determine the different sensitivity regimes, we compared two previously established threshold values of FNR, which differ from each other in the range of ratios on which the regime transition occurs. The evaluation from 2006 to 2016 showed that the FNR gradually changed, causing variations in the ozone formation sensitivity. While in 2006, more regions were under NOx-limited/transitional regimes, in 2016, the VOC-limited conditions prevailed in most of the city. The analysis disclosed that this change is due to increasing NOx emissions in some regions of MCMA and decreasing VOC emissions in other areas. The observed trend is different from that in major cities in other parts of the world, such as the United States, where ozone formation sensitivity has moved towards NOx-limited conditions. Therefore, reducing VOC emissions would be a suitable approach for decreasing tropospheric ozone concentrations in the MCMA.Jairo Vazquez SantiagoKazuya InoueKenichi TonokuraElsevierarticleFormaldehydeNitrogen dioxideOzone formation sensitivityOzone monitoring instrumentEnvironmental sciencesGE1-350ENEnvironmental Advances, Vol 6, Iss , Pp 100138- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Formaldehyde Nitrogen dioxide Ozone formation sensitivity Ozone monitoring instrument Environmental sciences GE1-350
spellingShingle	Formaldehyde Nitrogen dioxide Ozone formation sensitivity Ozone monitoring instrument Environmental sciences GE1-350 Jairo Vazquez Santiago Kazuya Inoue Kenichi Tonokura Diagnosis of ozone formation sensitivity in the Mexico City Metropolitan Area using HCHO/NO2 column ratios from the ozone monitoring instrument
description	The formation of tropospheric ozone is influenced by emissions of volatile organic compounds (VOCs) and nitrogen oxides (NOx), and different regimes of sensitivity to the ozone formation have been identified depending on the concentrations of both groups of compounds. We studied the ozone formation sensitivity in the Mexico City Metropolitan Area (MCMA) using the formaldehyde to nitrogen dioxide ratio (FNR) as a proxy for the VOCs and NOx concentrations, with data retrieved from the Ozone Monitoring Instrument (OMI). To determine the different sensitivity regimes, we compared two previously established threshold values of FNR, which differ from each other in the range of ratios on which the regime transition occurs. The evaluation from 2006 to 2016 showed that the FNR gradually changed, causing variations in the ozone formation sensitivity. While in 2006, more regions were under NOx-limited/transitional regimes, in 2016, the VOC-limited conditions prevailed in most of the city. The analysis disclosed that this change is due to increasing NOx emissions in some regions of MCMA and decreasing VOC emissions in other areas. The observed trend is different from that in major cities in other parts of the world, such as the United States, where ozone formation sensitivity has moved towards NOx-limited conditions. Therefore, reducing VOC emissions would be a suitable approach for decreasing tropospheric ozone concentrations in the MCMA.
format	article
author	Jairo Vazquez Santiago Kazuya Inoue Kenichi Tonokura
author_facet	Jairo Vazquez Santiago Kazuya Inoue Kenichi Tonokura
author_sort	Jairo Vazquez Santiago
title	Diagnosis of ozone formation sensitivity in the Mexico City Metropolitan Area using HCHO/NO2 column ratios from the ozone monitoring instrument
title_short	Diagnosis of ozone formation sensitivity in the Mexico City Metropolitan Area using HCHO/NO2 column ratios from the ozone monitoring instrument
title_full	Diagnosis of ozone formation sensitivity in the Mexico City Metropolitan Area using HCHO/NO2 column ratios from the ozone monitoring instrument
title_fullStr	Diagnosis of ozone formation sensitivity in the Mexico City Metropolitan Area using HCHO/NO2 column ratios from the ozone monitoring instrument
title_full_unstemmed	Diagnosis of ozone formation sensitivity in the Mexico City Metropolitan Area using HCHO/NO2 column ratios from the ozone monitoring instrument
title_sort	diagnosis of ozone formation sensitivity in the mexico city metropolitan area using hcho/no2 column ratios from the ozone monitoring instrument
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/769fa5b5deb548e685e67be76c64f1f7
work_keys_str_mv	AT jairovazquezsantiago diagnosisofozoneformationsensitivityinthemexicocitymetropolitanareausinghchono2columnratiosfromtheozonemonitoringinstrument AT kazuyainoue diagnosisofozoneformationsensitivityinthemexicocitymetropolitanareausinghchono2columnratiosfromtheozonemonitoringinstrument AT kenichitonokura diagnosisofozoneformationsensitivityinthemexicocitymetropolitanareausinghchono2columnratiosfromtheozonemonitoringinstrument
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Diagnosis of ozone formation sensitivity in the Mexico City Metropolitan Area using HCHO/NO2 column ratios from the ozone monitoring instrument

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