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Research Article
Giovanni Carabali
Instituto de Geofísica, Universidad Nacional Autónoma de México.
Corresponding Author
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This work is licensed under a CC BY 4.0 License. Read Full License
More than 7 thousand wildfires were recorded over Mexico in 2019, affecting almost 640 thousand hectares. Most of these fires occurred during the warm-dry season generating dense smoke plumes, impacting urban areas in the central part of the Mexican plateau. From May 10 to 17, 2019, biomass burning (BB) plumes affected Mexico City (MC) and diffused across the basin, drastically reducing visibility. Due to the severity of this high atmospheric pollution (HAP) episode, the local government declared an environmental contingency, warning the population. Fine particle (PM2.5) concentrations were ~ 2 times higher than the nation's air quality standards. Likewise, aerosol optical measurements indicated that visibility was mainly affected by fine aerosol particles. Electron microscopy analysis of aerosol samples obtained during the HAP days shows a high incidence of strong absorbent soot and tarballs (TB). These types of particles were simultaneously observed in MC and at the high-altitude Altzomoni Atmospheric Observatory (~ 4010 m.a.g.l.). Elemental analysis of the particles shows that the composition is dominated by sulfur and potassium, evidencing a strong influence of the BB emissions, but also suggests the presence of urban pollution from MC at the remote Altzomoni site.
Keywords
atmospheric pollution, aerosol particles, environmental science
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No competing interests reported.
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See the published version of this preprint at Scientific Reports.
This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research Article
Giovanni Carabali
Instituto de Geofísica, Universidad Nacional Autónoma de México.
Corresponding Author
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Published
View the published article at Scientific Reports.
Version 1
Posted 04 Jun, 2021
No community comments so far
Editorial decision: Major revision
On 08 Sep, 2021
Reviews received
Received 07 Sep, 2021
Reviews received
Received 15 Jul, 2021
Reviewers agreed
On 29 Jun, 2021
Reviewers agreed
On 28 Jun, 2021
Reviewers invited
Invitations sent on 04 Jun, 2021
Editor assigned
On 04 Jun, 2021
Editor invited
On 04 Jun, 2021
Submission checks complete
On 02 Jun, 2021
First submitted
On 28 May, 2021
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published article at Scientific Reports.
More than 7 thousand wildfires were recorded over Mexico in 2019, affecting almost 640 thousand hectares. Most of these fires occurred during the warm-dry season generating dense smoke plumes, impacting urban areas in the central part of the Mexican plateau. From May 10 to 17, 2019, biomass burning (BB) plumes affected Mexico City (MC) and diffused across the basin, drastically reducing visibility. Due to the severity of this high atmospheric pollution (HAP) episode, the local government declared an environmental contingency, warning the population. Fine particle (PM2.5) concentrations were ~ 2 times higher than the nation's air quality standards. Likewise, aerosol optical measurements indicated that visibility was mainly affected by fine aerosol particles. Electron microscopy analysis of aerosol samples obtained during the HAP days shows a high incidence of strong absorbent soot and tarballs (TB). These types of particles were simultaneously observed in MC and at the high-altitude Altzomoni Atmospheric Observatory (~ 4010 m.a.g.l.). Elemental analysis of the particles shows that the composition is dominated by sulfur and potassium, evidencing a strong influence of the BB emissions, but also suggests the presence of urban pollution from MC at the remote Altzomoni site.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
No competing interests reported.
This is a list of supplementary files associated with this preprint. Click to download.
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