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| DOI | 10.1016/j.atmosenv.2019.117131 |
| Air quality in Mexico city during the fuel shortage of January 2019 | |
| García-Franco J.L. | |
| 发表日期 | 2020 |
| ISSN | 1352-2310 |
| 卷号 | 222 |
| 英文摘要 | The closure of pipelines to tackle fuel-theft in central Mexico caused an unexpected fuel shortage that disrupted transport systems in Mexico City in January of 2019. Fuel sales in the Metropolitan Area and CO emissions from reanalysis showed a significant decrease during the fuel shortage of 7% and 6%, respectively. This study analyses the air quality and meteorological conditions during this period to evaluate whether these measures indirectly affected air quality in Mexico City. During the shortage, mean-ambient concentrations of nitric oxide (NO), nitrogen dioxide (NO2) and carbon monoxide (CO) were significantly lower than normal whereas levels of particulate matter (PM) were only modestly lower than usual. Daily-mean NO and CO had record-low anomalies of −10 ppb and −0.5 ppm from typical days, respectively. In contrast, ozone mean-levels were not significantly different than average. The percentage of days with PM mean concentrations above the World Health Organisation guidelines (5 and 19% for particles smaller than 2.5 and 10 μm, respectively) and the percentage of ozone 8-h rolling means above Mexican law (0.5%) were record lows. Meteorological factors, such as wind speed or the mixed-layer height were not significantly different than average. The anomalously low pollution levels were accentuated when each day was compared to days of similar flow patterns. This episode of better than usual air quality showcases how strategies addressing transport emissions could control air quality in Mexico City and highlights that improving ozone mean levels require comprehensive strategies that reduce emissions from all sectors. © 2019 Elsevier Ltd |
| 关键词 | Air pollutionMeteorological forcingOzonePrimary pollutantsTransport emissions |
| 语种 | 英语 |
| scopus关键词 | Air pollution; Air quality; Carbon monoxide; Fuels; Nitric oxide; Nitrogen oxides; Ozone; Ozone layer; Wind; Ambient concentrations; Mean concentrations; Meteorological condition; Meteorological factors; Meteorological forcing; Particulate Matter; Primary pollutants; Transport emissions; Quality control; carbon monoxide; fuel; nitric oxide; nitrogen dioxide; ozone; air quality; atmospheric pollution; carbon monoxide; concentration (composition); meteorology; metropolitan area; nitric oxide; nitrogen dioxide; ozone; particulate matter; spatiotemporal analysis; traffic emission; World Health Organization; aerosol; air quality; air quality control; Article; chemical interaction; controlled study; environmental exposure; exhaust gas; meteorology; Mexico City; particulate matter; practice guideline; priority journal; surface property; wind speed; World Health Organization; Federal District [Mexico]; Mexico City; Mexico [North America] |
| 来源期刊 | ATMOSPHERIC ENVIRONMENT
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/249450 |
| 作者单位 | Atmospheric, Oceanic and Planetary Physics, Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road Oxford, Oxford, OX1 3PU, United Kingdom |
| 推荐引用方式 GB/T 7714 | García-Franco J.L.. Air quality in Mexico city during the fuel shortage of January 2019[J],2020,222. |
| APA | García-Franco J.L..(2020).Air quality in Mexico city during the fuel shortage of January 2019.ATMOSPHERIC ENVIRONMENT,222. |
| MLA | García-Franco J.L.."Air quality in Mexico city during the fuel shortage of January 2019".ATMOSPHERIC ENVIRONMENT 222(2020). |
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