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En el instante 21 de octubre de 2025, 9:01:39 UTC,
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Añadido recurso Impact of the COVID-19 lockdown on air quality and resulting public health benefits in the Mexico City metropolitan area a Impact of the COVID-19 lockdown on air quality and resulting public health benefits in the Mexico City metropolitan area
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| 2 | "author": "IY Hern\u00e1ndez-Paniagua, SI Valdez, V Almanza, C | 2 | "author": "IY Hern\u00e1ndez-Paniagua, SI Valdez, V Almanza, C | ||
| 3 | Rivera-C\u00e1rdenas, ...", | 3 | Rivera-C\u00e1rdenas, ...", | ||
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| 61 | "notes": "Meteorology and long-term trends in air pollutant | 61 | "notes": "Meteorology and long-term trends in air pollutant | ||
| 62 | concentrations may obscure the results from short-term policies | 62 | concentrations may obscure the results from short-term policies | ||
| 63 | implemented to improve air quality. This study presents changes in CO, | 63 | implemented to improve air quality. This study presents changes in CO, | ||
| 64 | NO 2 , O 3 , SO 2 , PM 10 , and PM 2.5 based on their anomalies during | 64 | NO 2 , O 3 , SO 2 , PM 10 , and PM 2.5 based on their anomalies during | ||
| 65 | the COVID-19 partial (Phase 2) and total (Phase 3) lockdowns in Mexico | 65 | the COVID-19 partial (Phase 2) and total (Phase 3) lockdowns in Mexico | ||
| 66 | City (MCMA). To minimise the impact of the air pollutant long-term | 66 | City (MCMA). To minimise the impact of the air pollutant long-term | ||
| 67 | trends, pollutant anomalies were calculated using as baseline | 67 | trends, pollutant anomalies were calculated using as baseline | ||
| 68 | truncated Fourier series, fitted with data from 2016 to 2019, and then | 68 | truncated Fourier series, fitted with data from 2016 to 2019, and then | ||
| 69 | compared with those from the lockdown. Additionally, days with | 69 | compared with those from the lockdown. Additionally, days with | ||
| 70 | stagnant conditions and heavy rain were excluded to reduce the impact | 70 | stagnant conditions and heavy rain were excluded to reduce the impact | ||
| 71 | of extreme weather changes. Satellite observations for NO 2 and CO | 71 | of extreme weather changes. Satellite observations for NO 2 and CO | ||
| 72 | were used to contrast the ground-based derived results. During the | 72 | were used to contrast the ground-based derived results. During the | ||
| 73 | lockdown Phase 2, only NO 2 exhibited significant decreases ( p | 73 | lockdown Phase 2, only NO 2 exhibited significant decreases ( p | ||
| 74 | < 0.05) of between 10 and 23% due to reductions in motor | 74 | < 0.05) of between 10 and 23% due to reductions in motor | ||
| 75 | vehicle emissions. By contrast, O 3 increased ( p < 0.05) | 75 | vehicle emissions. By contrast, O 3 increased ( p < 0.05) | ||
| 76 | between 16 and 40% at the same sites where NO 2 decreased. During | 76 | between 16 and 40% at the same sites where NO 2 decreased. During | ||
| 77 | Phase 3, significant decreases ( p < 0.05) were observed for NO | 77 | Phase 3, significant decreases ( p < 0.05) were observed for NO | ||
| 78 | 2 (43%), PM 10 (20%), and PM 2.5 (32%) in response to the total | 78 | 2 (43%), PM 10 (20%), and PM 2.5 (32%) in response to the total | ||
| 79 | lockdown. Although O 3 concentrations were lower in Phase 3 than | 79 | lockdown. Although O 3 concentrations were lower in Phase 3 than | ||
| 80 | during Phase 2, those did not decrease ( p < 0.05) from the | 80 | during Phase 2, those did not decrease ( p < 0.05) from the | ||
| 81 | baseline at any site despite the total lockdown. SO 2 decreased only | 81 | baseline at any site despite the total lockdown. SO 2 decreased only | ||
| 82 | during Phase 3 in a near-road environment. Satellite observations | 82 | during Phase 3 in a near-road environment. Satellite observations | ||
| 83 | confirmed that NO 2 decreased and CO stabilised during the total | 83 | confirmed that NO 2 decreased and CO stabilised during the total | ||
| 84 | lockdown. Air pollutant changes during the lockdown could be | 84 | lockdown. Air pollutant changes during the lockdown could be | ||
| 85 | overestimated between 2 and 10-fold without accounting for the | 85 | overestimated between 2 and 10-fold without accounting for the | ||
| 86 | influences of meteorology and long-term trends in pollutant | 86 | influences of meteorology and long-term trends in pollutant | ||
| 87 | concentrations. Air quality improved significantly during the lockdown | 87 | concentrations. Air quality improved significantly during the lockdown | ||
| 88 | driven by reduced NO 2 and PM 2.5 emissions despite increases in O 3 , | 88 | driven by reduced NO 2 and PM 2.5 emissions despite increases in O 3 , | ||
| 89 | resulting in health benefits for the MCMA population. A health | 89 | resulting in health benefits for the MCMA population. A health | ||
| 90 | assessment conducted suggested that around 588 deaths related to air | 90 | assessment conducted suggested that around 588 deaths related to air | ||
| 91 | pollution exposure were averted during the lockdown. Our results show | 91 | pollution exposure were averted during the lockdown. Our results show | ||
| 92 | that to reduce O 3 within the MCMA, policies must focus on reducing | 92 | that to reduce O 3 within the MCMA, policies must focus on reducing | ||
| 93 | VOCs emissions from non-mobile sources. The measures implemented | 93 | VOCs emissions from non-mobile sources. The measures implemented | ||
| 94 | during the COVID-19 lockdowns provide valuable information to reduce | 94 | during the COVID-19 lockdowns provide valuable information to reduce | ||
| 95 | air pollution through a range of abatement strategies for emissions | 95 | air pollution through a range of abatement strategies for emissions | ||
| 96 | other than from motor vehicles.", | 96 | other than from motor vehicles.", | ||
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| 123 | pollutant concentrations may obscure the results from short-term | ||||
| 124 | policies implemented to improve air quality. This study presents | ||||
| 125 | changes in CO, NO 2 , O 3 , SO 2 , PM 10 , and PM 2.5 based on their | ||||
| 126 | anomalies during the COVID-19 partial (Phase 2) and total (Phase 3) | ||||
| 127 | lockdowns in Mexico City (MCMA). To minimise the impact of the air | ||||
| 128 | pollutant long-term trends, pollutant anomalies were calculated using | ||||
| 129 | as baseline truncated Fourier series, fitted with data from 2016 to | ||||
| 130 | 2019, and then compared with those from the lockdown. Additionally, | ||||
| 131 | days with stagnant conditions and heavy rain were excluded to reduce | ||||
| 132 | the impact of extreme weather changes. Satellite observations for NO 2 | ||||
| 133 | and CO were used to contrast the ground-based derived results. During | ||||
| 134 | the lockdown Phase 2, only NO 2 exhibited significant decreases ( p | ||||
| 135 | < 0.05) of between 10 and 23% due to reductions in motor | ||||
| 136 | vehicle emissions. By contrast, O 3 increased ( p < 0.05) | ||||
| 137 | between 16 and 40% at the same sites where NO 2 decreased. During | ||||
| 138 | Phase 3, significant decreases ( p < 0.05) were observed for NO | ||||
| 139 | 2 (43%), PM 10 (20%), and PM 2.5 (32%) in response to the total | ||||
| 140 | lockdown. Although O 3 concentrations were lower in Phase 3 than | ||||
| 141 | during Phase 2, those did not decrease ( p < 0.05) from the | ||||
| 142 | baseline at any site despite the total lockdown. SO 2 decreased only | ||||
| 143 | during Phase 3 in a near-road environment. Satellite observations | ||||
| 144 | confirmed that NO 2 decreased and CO stabilised during the total | ||||
| 145 | lockdown. Air pollutant changes during the lockdown could be | ||||
| 146 | overestimated between 2 and 10-fold without accounting for the | ||||
| 147 | influences of meteorology and long-term trends in pollutant | ||||
| 148 | concentrations. Air quality improved significantly during the lockdown | ||||
| 149 | driven by reduced NO 2 and PM 2.5 emissions despite increases in O 3 , | ||||
| 150 | resulting in health benefits for the MCMA population. A health | ||||
| 151 | assessment conducted suggested that around 588 deaths related to air | ||||
| 152 | pollution exposure were averted during the lockdown. Our results show | ||||
| 153 | that to reduce O 3 within the MCMA, policies must focus on reducing | ||||
| 154 | VOCs emissions from non-mobile sources. The measures implemented | ||||
| 155 | during the COVID-19 lockdowns provide valuable information to reduce | ||||
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| 226 | "id": "f42a8210-1cef-4f03-98a0-a6d3d0d4f848", | 287 | "id": "f42a8210-1cef-4f03-98a0-a6d3d0d4f848", | ||
| 227 | "name": "svaldez", | 288 | "name": "svaldez", | ||
| 228 | "state": "active", | 289 | "state": "active", | ||
| 229 | "vocabulary_id": null | 290 | "vocabulary_id": null | ||
| 230 | } | 291 | } | ||
| 231 | ], | 292 | ], | ||
| 232 | "title": "Impact of the COVID-19 lockdown on air quality and | 293 | "title": "Impact of the COVID-19 lockdown on air quality and | ||
| 233 | resulting public health benefits in the Mexico City metropolitan | 294 | resulting public health benefits in the Mexico City metropolitan | ||
| 234 | area", | 295 | area", | ||
| 235 | "type": "dataset", | 296 | "type": "dataset", | ||
| 236 | "url": | 297 | "url": | ||
| 237 | esize=100&sortby=pubdate&citation_for_view=MG1jyREAAAAJ:_Ybze24A_UAC", | 298 | esize=100&sortby=pubdate&citation_for_view=MG1jyREAAAAJ:_Ybze24A_UAC", | ||
| 238 | "version": null | 299 | "version": null | ||
| 239 | } | 300 | } |
