Ozone response to emission changes: a modeling study during the MCMA-2006/MILAGRO Campaign
The sensitivity of ozone production to precursor emissions was investigated under five different meteorological conditions in the Mexico City Metropolitan Area (MCMA) during the MCMA-2006/MILAGRO field campaign using the gridded photochemical model CAMx driven by observation-nudged WRF meteorology....
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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European Geosciences Union / Copernicus
2011
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| Online Access: | http://hdl.handle.net/1721.1/66221 https://orcid.org/0000-0002-3596-5334 |
| _version_ | 1826188794097827840 |
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| author | Lei, Wenfang Bei, Naifang Zavala, M. de Foy, B. Cardenas, B. Zheng, J. Zhang, R. Molina, Luisa Tan Song, J. Volkamer, R. A. |
| author2 | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Lei, Wenfang Bei, Naifang Zavala, M. de Foy, B. Cardenas, B. Zheng, J. Zhang, R. Molina, Luisa Tan Song, J. Volkamer, R. A. |
| author_sort | Lei, Wenfang |
| collection | MIT |
| description | The sensitivity of ozone production to precursor emissions was investigated under five different meteorological conditions in the Mexico City Metropolitan Area (MCMA) during the MCMA-2006/MILAGRO field campaign using the gridded photochemical model CAMx driven by observation-nudged WRF meteorology. Precursor emissions were constrained by the comprehensive data from the field campaign and the routine ambient air quality monitoring network. Simulated plume mixing and transport were examined by comparing with measurements from the G-1 aircraft during the campaign. The observed concentrations of ozone precursors and ozone were reasonably well reproduced by the model. The effects of reducing precursor emissions on urban ozone production were performed for three representative emission control scenarios. A 50% reduction in VOC emissions led to 7 to 22 ppb decrease in daily maximum ozone concentrations, while a 50% reduction in NOx [NO subscript x] emissions leads to 4 to 21 ppb increase, and 50% reductions in both NOx [NO subscript x] and VOC emission decrease the daily maximum ozone concentrations up to 10 ppb. These results along with a chemical indicator analysis using the chemical production ratios of H2O2 [H subscript 2 O subscript 2] to HNO3 [HNO subscript 3] demonstrate that the MCMA urban core region is VOC-limited for all meteorological episodes, which is consistent with the results from MCMA-2003 field campaign; however the degree of the VOC-sensitivity is higher during MCMA-2006 due to lower VOCs, lower VOC reactivity and moderately higher NOx [NO subscript x] emissions. Ozone formation in the surrounding mountain/rural area is mostly NOx-limited [NO subscript x - limited], but can be VOC-limited, and the range of the NOx-limited [NO subscript x - limited] or VOC-limited areas depends on meteorology. |
| first_indexed | 2024-09-23T08:04:47Z |
| format | Article |
| id | mit-1721.1/66221 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:04:47Z |
| publishDate | 2011 |
| publisher | European Geosciences Union / Copernicus |
| record_format | dspace |
| spelling | mit-1721.1/662212024-05-15T02:19:02Z Ozone response to emission changes: a modeling study during the MCMA-2006/MILAGRO Campaign Lei, Wenfang Bei, Naifang Zavala, M. de Foy, B. Cardenas, B. Zheng, J. Zhang, R. Molina, Luisa Tan Song, J. Volkamer, R. A. Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Molina, Luisa Tan Song, Jihee Lei, Wenfang Volkamer, Rainer Molina, Luisa Tan Bei, Naifang The sensitivity of ozone production to precursor emissions was investigated under five different meteorological conditions in the Mexico City Metropolitan Area (MCMA) during the MCMA-2006/MILAGRO field campaign using the gridded photochemical model CAMx driven by observation-nudged WRF meteorology. Precursor emissions were constrained by the comprehensive data from the field campaign and the routine ambient air quality monitoring network. Simulated plume mixing and transport were examined by comparing with measurements from the G-1 aircraft during the campaign. The observed concentrations of ozone precursors and ozone were reasonably well reproduced by the model. The effects of reducing precursor emissions on urban ozone production were performed for three representative emission control scenarios. A 50% reduction in VOC emissions led to 7 to 22 ppb decrease in daily maximum ozone concentrations, while a 50% reduction in NOx [NO subscript x] emissions leads to 4 to 21 ppb increase, and 50% reductions in both NOx [NO subscript x] and VOC emission decrease the daily maximum ozone concentrations up to 10 ppb. These results along with a chemical indicator analysis using the chemical production ratios of H2O2 [H subscript 2 O subscript 2] to HNO3 [HNO subscript 3] demonstrate that the MCMA urban core region is VOC-limited for all meteorological episodes, which is consistent with the results from MCMA-2003 field campaign; however the degree of the VOC-sensitivity is higher during MCMA-2006 due to lower VOCs, lower VOC reactivity and moderately higher NOx [NO subscript x] emissions. Ozone formation in the surrounding mountain/rural area is mostly NOx-limited [NO subscript x - limited], but can be VOC-limited, and the range of the NOx-limited [NO subscript x - limited] or VOC-limited areas depends on meteorology. United States. Dept. of Energy. Office of Biological and Environmental Research. Atmospheric Science Program (DE-FG02-05ER63980) National Science Foundation (U.S.). Atmospheric Chemistry Program (ATM-0528227) National Science Foundation (U.S.). Atmospheric Chemistry Program (ATM-810931) Mexico. Comisión Ambiental Metropolitana Molina Center for Energy and the Environment 2011-10-12T15:29:59Z 2011-10-12T15:29:59Z 2010-04 2010-03 Article http://purl.org/eprint/type/JournalArticle 1680-7324 1680-7316 http://hdl.handle.net/1721.1/66221 Song, J. et al. “Ozone response to emission changes: a modeling study during the MCMA-2006/MILAGRO Campaign.” Atmospheric Chemistry and Physics 10 (2010): 3827-3846. © Author(s) 2010. https://orcid.org/0000-0002-3596-5334 en_US http://dx.doi.org/10.5194/acp-10-3827-2010 Atmospheric Chemistry and Physics Creative Commons Attribution 3.0 http://creativecommons.org/licenses/by/3.0 application/pdf European Geosciences Union / Copernicus Copernicus |
| spellingShingle | Lei, Wenfang Bei, Naifang Zavala, M. de Foy, B. Cardenas, B. Zheng, J. Zhang, R. Molina, Luisa Tan Song, J. Volkamer, R. A. Ozone response to emission changes: a modeling study during the MCMA-2006/MILAGRO Campaign |
| title | Ozone response to emission changes: a modeling study during the MCMA-2006/MILAGRO Campaign |
| title_full | Ozone response to emission changes: a modeling study during the MCMA-2006/MILAGRO Campaign |
| title_fullStr | Ozone response to emission changes: a modeling study during the MCMA-2006/MILAGRO Campaign |
| title_full_unstemmed | Ozone response to emission changes: a modeling study during the MCMA-2006/MILAGRO Campaign |
| title_short | Ozone response to emission changes: a modeling study during the MCMA-2006/MILAGRO Campaign |
| title_sort | ozone response to emission changes a modeling study during the mcma 2006 milagro campaign |
| url | http://hdl.handle.net/1721.1/66221 https://orcid.org/0000-0002-3596-5334 |
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