Impact of the COVID-19 outbreak on air pollution levels in East Asia.
Identifieur interne : 000354 ( Main/Exploration ); précédent : 000353; suivant : 000355Impact of the COVID-19 outbreak on air pollution levels in East Asia.
Auteurs : Masoud Ghahremanloo [États-Unis] ; Yannic Lops [États-Unis] ; Yunsoo Choi [États-Unis] ; Seyedali Mousavinezhad [États-Unis]Source :
- The Science of the total environment [ 1879-1026 ] ; 2021.
Descripteurs français
- KwdFr :
- MESH :
- épidémiologie : Tokyo.
- Chine, Extrême-Orient, Humains, Pandémies, Polluants atmosphériques, Pollution de l'air, Surveillance de l'environnement, Séoul, Épidémies de maladies.
English descriptors
- KwdEn :
- MESH :
- chemical : Air Pollutants.
- geographic , epidemiology : Tokyo.
- geographic : China, Far East, Seoul.
- Air Pollution, COVID-19, Disease Outbreaks, Environmental Monitoring, Humans, Pandemics.
Abstract
This study leverages satellite remote sensing to investigate the impact of the coronavirus outbreak and the resulting lockdown of public venues on air pollution levels in East Asia. We analyze data from the Sentinel-5P and the Himawari-8 satellites to examine concentrations of NO2, HCHO, SO2, and CO, and the aerosol optical depth (AOD) over the BTH, Wuhan, Seoul, and Tokyo regions in February 2019 and February 2020. Results show that most of the concentrations of pollutants are lower than those of February 2019. Compared to other pollutants, NO2 experienced the most significant reductions by almost 54%, 83%, 33%, and 19% decrease in BTH, Wuhan, Seoul, and Tokyo, respectively. The greatest reductions in pollutants occurred in Wuhan, with a decrease of almost 83%, 11%, 71%, and 4% in the column densities of NO2, HCHO, SO2, and CO, respectively, and a decrease of about 62% in the AOD. Although NO2, CO, and formaldehyde concentrations decreased in the Seoul and Tokyo metropolitan areas compared to the previous year, concentrations of SO2 showed an increase in these two regions due to the effect of transport from polluted upwind regions. We also show that meteorological factors were not the main reason for the dramatic reductions of pollutants in the atmosphere. Moreover, an investigation of the HCHO/NO2 ratio shows that in many regions of East China, particularly in Wuhan, ozone production in February 2020 is less NOX saturated during the daytime than it was in February 2019. With large reductions in the concentrations of NO2 during lockdown situations, we find that significant increases in surface ozone in East China from February 2019 to February 2020 are likely the result of less reaction of NO and O3 caused by significantly reduced NOX concentrations and less NOX saturation in East China during the daytime.
DOI: 10.1016/j.scitotenv.2020.142226
PubMed: 33254896
PubMed Central: PMC7476443
Affiliations:
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Electronic address: mghahremanloo@uh.edu.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77004</wicri:regionArea><placeName><region type="state">Texas</region></placeName></affiliation></author><author><name sortKey="Lops, Yannic" sort="Lops, Yannic" uniqKey="Lops Y" first="Yannic" last="Lops">Yannic Lops</name><affiliation wicri:level="2"><nlm:affiliation>Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77004, USA. Electronic address: ylops@central.uh.edu.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77004</wicri:regionArea><placeName><region type="state">Texas</region></placeName></affiliation></author><author><name sortKey="Choi, Yunsoo" sort="Choi, Yunsoo" uniqKey="Choi Y" first="Yunsoo" last="Choi">Yunsoo Choi</name><affiliation wicri:level="2"><nlm:affiliation>Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77004, USA. Electronic address: ychoi6@uh.edu.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77004</wicri:regionArea><placeName><region type="state">Texas</region></placeName></affiliation></author><author><name sortKey="Mousavinezhad, Seyedali" sort="Mousavinezhad, Seyedali" uniqKey="Mousavinezhad S" first="Seyedali" last="Mousavinezhad">Seyedali Mousavinezhad</name><affiliation wicri:level="2"><nlm:affiliation>Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77004, USA. Electronic address: smousavinezhad@uh.edu.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77004</wicri:regionArea><placeName><region type="state">Texas</region></placeName></affiliation></author></analytic><series><title level="j">The Science of the total environment</title><idno type="eISSN">1879-1026</idno><imprint><date when="2021" type="published">2021</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Air Pollutants (MeSH)</term><term>Air Pollution (MeSH)</term><term>COVID-19 (MeSH)</term><term>China (MeSH)</term><term>Disease Outbreaks (MeSH)</term><term>Environmental Monitoring (MeSH)</term><term>Far East (MeSH)</term><term>Humans (MeSH)</term><term>Pandemics (MeSH)</term><term>Seoul (MeSH)</term><term>Tokyo (epidemiology)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Chine (MeSH)</term><term>Extrême-Orient (MeSH)</term><term>Humains (MeSH)</term><term>Pandémies (MeSH)</term><term>Polluants atmosphériques (MeSH)</term><term>Pollution de l'air (MeSH)</term><term>Surveillance de l'environnement (MeSH)</term><term>Séoul (MeSH)</term><term>Tokyo (épidémiologie)</term><term>Épidémies de maladies (MeSH)</term></keywords><keywords scheme="MESH" type="chemical" xml:lang="en"><term>Air Pollutants</term></keywords><keywords scheme="MESH" type="geographic" qualifier="epidemiology" xml:lang="en"><term>Tokyo</term></keywords><keywords scheme="MESH" type="geographic" xml:lang="en"><term>China</term><term>Far East</term><term>Seoul</term></keywords><keywords scheme="MESH" qualifier="épidémiologie" xml:lang="fr"><term>Tokyo</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Air Pollution</term><term>COVID-19</term><term>Disease Outbreaks</term><term>Environmental Monitoring</term><term>Humans</term><term>Pandemics</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Chine</term><term>Extrême-Orient</term><term>Humains</term><term>Pandémies</term><term>Polluants atmosphériques</term><term>Pollution de l'air</term><term>Surveillance de l'environnement</term><term>Séoul</term><term>Épidémies de maladies</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">This study leverages satellite remote sensing to investigate the impact of the coronavirus outbreak and the resulting lockdown of public venues on air pollution levels in East Asia. We analyze data from the Sentinel-5P and the Himawari-8 satellites to examine concentrations of NO<sub>2</sub>, HCHO, SO<sub>2</sub>, and CO, and the aerosol optical depth (AOD) over the BTH, Wuhan, Seoul, and Tokyo regions in February 2019 and February 2020. Results show that most of the concentrations of pollutants are lower than those of February 2019. Compared to other pollutants, NO<sub>2</sub> experienced the most significant reductions by almost 54%, 83%, 33%, and 19% decrease in BTH, Wuhan, Seoul, and Tokyo, respectively. The greatest reductions in pollutants occurred in Wuhan, with a decrease of almost 83%, 11%, 71%, and 4% in the column densities of NO<sub>2</sub>, HCHO, SO<sub>2</sub>, and CO, respectively, and a decrease of about 62% in the AOD. Although NO<sub>2</sub>, CO, and formaldehyde concentrations decreased in the Seoul and Tokyo metropolitan areas compared to the previous year, concentrations of SO<sub>2</sub> showed an increase in these two regions due to the effect of transport from polluted upwind regions. We also show that meteorological factors were not the main reason for the dramatic reductions of pollutants in the atmosphere. Moreover, an investigation of the HCHO/NO<sub>2</sub> ratio shows that in many regions of East China, particularly in Wuhan, ozone production in February 2020 is less NO<sub>X</sub> saturated during the daytime than it was in February 2019. With large reductions in the concentrations of NO<sub>2</sub> during lockdown situations, we find that significant increases in surface ozone in East China from February 2019 to February 2020 are likely the result of less reaction of NO and O<sub>3</sub> caused by significantly reduced NO<sub>X</sub> concentrations and less NO<sub>X</sub> saturation in East China during the daytime.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" IndexingMethod="Automated" Owner="NLM"><PMID Version="1">33254896</PMID><DateCompleted><Year>2020</Year><Month>12</Month><Day>04</Day></DateCompleted><DateRevised><Year>2021</Year><Month>01</Month><Day>28</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1879-1026</ISSN><JournalIssue CitedMedium="Internet"><Volume>754</Volume><PubDate><Year>2021</Year><Month>Feb</Month><Day>01</Day></PubDate></JournalIssue><Title>The Science of the total environment</Title><ISOAbbreviation>Sci Total Environ</ISOAbbreviation></Journal><ArticleTitle>Impact of the COVID-19 outbreak on air pollution levels in East Asia.</ArticleTitle><Pagination><MedlinePgn>142226</MedlinePgn></Pagination><ELocationID EIdType="pii" ValidYN="Y">S0048-9697(20)35755-7</ELocationID><ELocationID EIdType="doi" ValidYN="Y">10.1016/j.scitotenv.2020.142226</ELocationID><Abstract><AbstractText>This study leverages satellite remote sensing to investigate the impact of the coronavirus outbreak and the resulting lockdown of public venues on air pollution levels in East Asia. We analyze data from the Sentinel-5P and the Himawari-8 satellites to examine concentrations of NO<sub>2</sub>, HCHO, SO<sub>2</sub>, and CO, and the aerosol optical depth (AOD) over the BTH, Wuhan, Seoul, and Tokyo regions in February 2019 and February 2020. Results show that most of the concentrations of pollutants are lower than those of February 2019. Compared to other pollutants, NO<sub>2</sub> experienced the most significant reductions by almost 54%, 83%, 33%, and 19% decrease in BTH, Wuhan, Seoul, and Tokyo, respectively. The greatest reductions in pollutants occurred in Wuhan, with a decrease of almost 83%, 11%, 71%, and 4% in the column densities of NO<sub>2</sub>, HCHO, SO<sub>2</sub>, and CO, respectively, and a decrease of about 62% in the AOD. Although NO<sub>2</sub>, CO, and formaldehyde concentrations decreased in the Seoul and Tokyo metropolitan areas compared to the previous year, concentrations of SO<sub>2</sub> showed an increase in these two regions due to the effect of transport from polluted upwind regions. We also show that meteorological factors were not the main reason for the dramatic reductions of pollutants in the atmosphere. Moreover, an investigation of the HCHO/NO<sub>2</sub> ratio shows that in many regions of East China, particularly in Wuhan, ozone production in February 2020 is less NO<sub>X</sub> saturated during the daytime than it was in February 2019. With large reductions in the concentrations of NO<sub>2</sub> during lockdown situations, we find that significant increases in surface ozone in East China from February 2019 to February 2020 are likely the result of less reaction of NO and O<sub>3</sub> caused by significantly reduced NO<sub>X</sub> concentrations and less NO<sub>X</sub> saturation in East China during the daytime.</AbstractText><CopyrightInformation>Copyright © 2020 Elsevier B.V. All rights reserved.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Ghahremanloo</LastName><ForeName>Masoud</ForeName><Initials>M</Initials><AffiliationInfo><Affiliation>Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77004, USA. Electronic address: mghahremanloo@uh.edu.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Lops</LastName><ForeName>Yannic</ForeName><Initials>Y</Initials><AffiliationInfo><Affiliation>Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77004, USA. Electronic address: ylops@central.uh.edu.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Choi</LastName><ForeName>Yunsoo</ForeName><Initials>Y</Initials><AffiliationInfo><Affiliation>Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77004, USA. Electronic address: ychoi6@uh.edu.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Mousavinezhad</LastName><ForeName>Seyedali</ForeName><Initials>S</Initials><AffiliationInfo><Affiliation>Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77004, USA. Electronic address: smousavinezhad@uh.edu.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2020</Year><Month>09</Month><Day>07</Day></ArticleDate></Article><MedlineJournalInfo><Country>Netherlands</Country><MedlineTA>Sci Total Environ</MedlineTA><NlmUniqueID>0330500</NlmUniqueID><ISSNLinking>0048-9697</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D000393">Air Pollutants</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D000393" MajorTopicYN="Y">Air Pollutants</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D000397" MajorTopicYN="Y">Air Pollution</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D000086382" MajorTopicYN="Y">COVID-19</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D002681" MajorTopicYN="N" Type="Geographic">China</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D004196" MajorTopicYN="N">Disease Outbreaks</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D004784" MajorTopicYN="N">Environmental Monitoring</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D005202" MajorTopicYN="N" Type="Geographic">Far East</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D006801" MajorTopicYN="N">Humans</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D058873" MajorTopicYN="N">Pandemics</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D066106" MajorTopicYN="N" Type="Geographic">Seoul</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014041" MajorTopicYN="N" Type="Geographic">Tokyo</DescriptorName><QualifierName UI="Q000453" MajorTopicYN="N">epidemiology</QualifierName></MeshHeading></MeshHeadingList><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">AOD</Keyword><Keyword MajorTopicYN="N">Air pollution</Keyword><Keyword MajorTopicYN="N">COVID-19</Keyword><Keyword MajorTopicYN="N">East Asia</Keyword><Keyword MajorTopicYN="N">Himawari-8</Keyword><Keyword MajorTopicYN="N">Remote sensing</Keyword><Keyword MajorTopicYN="N">TROPOMI</Keyword></KeywordList><CoiStatement>Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.</CoiStatement></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2020</Year><Month>06</Month><Day>19</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2020</Year><Month>08</Month><Day>13</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2020</Year><Month>09</Month><Day>03</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2020</Year><Month>12</Month><Day>1</Day><Hour>1</Hour><Minute>3</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2020</Year><Month>12</Month><Day>2</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2020</Year><Month>12</Month><Day>15</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">33254896</ArticleId><ArticleId IdType="pii">S0048-9697(20)35755-7</ArticleId><ArticleId IdType="doi">10.1016/j.scitotenv.2020.142226</ArticleId><ArticleId IdType="pmc">PMC7476443</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>États-Unis</li></country><region><li>Texas</li></region></list><tree><country name="États-Unis"><region name="Texas"><name sortKey="Ghahremanloo, Masoud" sort="Ghahremanloo, Masoud" uniqKey="Ghahremanloo M" first="Masoud" last="Ghahremanloo">Masoud Ghahremanloo</name></region><name sortKey="Choi, Yunsoo" sort="Choi, Yunsoo" uniqKey="Choi Y" first="Yunsoo" last="Choi">Yunsoo Choi</name><name sortKey="Lops, Yannic" sort="Lops, Yannic" uniqKey="Lops Y" first="Yannic" last="Lops">Yannic Lops</name><name sortKey="Mousavinezhad, Seyedali" sort="Mousavinezhad, Seyedali" uniqKey="Mousavinezhad S" first="Seyedali" last="Mousavinezhad">Seyedali Mousavinezhad</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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