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Multiscale CO Budget Estimates Across South America: Quantifying Local Sources and Long Range Transport.

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Title: Multiscale CO Budget Estimates Across South America: Quantifying Local Sources and Long Range Transport.
Authors: Lichtig, Pablo1,2 (AUTHOR) pablolichtig@cnea.gov.ar, Gaubert, Benjamin3 (AUTHOR), Emmons, Louisa K.3 (AUTHOR), Jo, Duseong S.3 (AUTHOR), Callaghan, Patrick3 (AUTHOR), Ibarra‐Espinosa, Sergio4 (AUTHOR), Dawidowski, Laura1 (AUTHOR), Brasseur, Guy P.5 (AUTHOR) guy.brasseur@mpimet.mpg.de, Pfister, Gabriele3 (AUTHOR)
Source: Journal of Geophysical Research. Atmospheres. Apr2024, Vol. 129 Issue 8, p1-17. 17p.
Subject Terms: *General circulation model, *Biomass burning, *Atmospheric chemistry, *Carbon monoxide, Tropospheric chemistry, Budget, Tropospheric aerosols
Geographic Terms: South America, Africa
Abstract: South America is a large continent situated mostly in the Southern Hemisphere (SH) with complex topography and diverse emissions sources. However, the atmospheric chemistry of this region has been historically understudied. Here, we employ the Multi‐Scale Infrastructure for Chemistry and Aerosols, a novel global circulation model with regional refinement capabilities and full chemistry, to explore the sources and distribution of the carbon monoxide (CO) tropospheric column in South America during 2019, and also to assess the effect that South American primary emissions have over the rest of the world. Most of the CO over South America can be explained either by non‐methane volatile organic compounds (NMVOC) secondary chemical production or by biomass burning emissions, with biomass burning as the main explanation for the variability in CO. Biomass burning in Central Africa is a relevant contributor to CO in all of the continent, including the southern tip. Biogenic emissions play a dual role in CO concentrations: they provide volatile organic compounds that contribute to the secondary CO production, but they also destroy OH, which limits the chemical production and destruction of CO. As a net effect, the lifetime of CO is extended to ∼120 days on average over the Amazon, while still being in the range of 30–60 days in the rest of South America. Plain Language Summary: We use the Multi‐Scale Infrastructure for Chemistry and Aerosols, a global model with regional refinement, to study the origins of carbon monoxide (CO) in South America during 2019. The main sources of CO are the secondary production from non‐volatile organic compounds and the biomass burning primary emissions. The main source of temporal variability in the whole are the biomass burning emissions. We show that biomass burning in central Africa is a relevant source of South American CO during all year in all of the continent, including the furthermost south. Key Points: We employ the Multi‐Scale infrastructure for Chemistry and Aerosols to quantify the budget of CO in South America during 2019Most of the variability in the CO burden is explained by the variability in biomass burning emissionsBiomass burning in Central Africa is a relevant contributor to CO in all of the continent, including the southern region [ABSTRACT FROM AUTHOR]
Copyright of Journal of Geophysical Research. Atmospheres is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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An: 176868792
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PubTypeId: academicJournal
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  Data: Multiscale CO Budget Estimates Across South America: Quantifying Local Sources and Long Range Transport.
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  Data: <searchLink fieldCode="AR" term="%22Lichtig%2C+Pablo%22">Lichtig, Pablo</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> pablolichtig@cnea.gov.ar</i><br /><searchLink fieldCode="AR" term="%22Gaubert%2C+Benjamin%22">Gaubert, Benjamin</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Emmons%2C+Louisa+K%2E%22">Emmons, Louisa K.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jo%2C+Duseong+S%2E%22">Jo, Duseong S.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Callaghan%2C+Patrick%22">Callaghan, Patrick</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ibarra‐Espinosa%2C+Sergio%22">Ibarra‐Espinosa, Sergio</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dawidowski%2C+Laura%22">Dawidowski, Laura</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Brasseur%2C+Guy+P%2E%22">Brasseur, Guy P.</searchLink><relatesTo>5</relatesTo> (AUTHOR)<i> guy.brasseur@mpimet.mpg.de</i><br /><searchLink fieldCode="AR" term="%22Pfister%2C+Gabriele%22">Pfister, Gabriele</searchLink><relatesTo>3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Geophysical+Research%2E+Atmospheres%22">Journal of Geophysical Research. Atmospheres</searchLink>. Apr2024, Vol. 129 Issue 8, p1-17. 17p.
– Name: Subject
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  Data: *<searchLink fieldCode="DE" term="%22General+circulation+model%22">General circulation model</searchLink><br />*<searchLink fieldCode="DE" term="%22Biomass+burning%22">Biomass burning</searchLink><br />*<searchLink fieldCode="DE" term="%22Atmospheric+chemistry%22">Atmospheric chemistry</searchLink><br />*<searchLink fieldCode="DE" term="%22Carbon+monoxide%22">Carbon monoxide</searchLink><br /><searchLink fieldCode="DE" term="%22Tropospheric+chemistry%22">Tropospheric chemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Budget%22">Budget</searchLink><br /><searchLink fieldCode="DE" term="%22Tropospheric+aerosols%22">Tropospheric aerosols</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22South+America%22">South America</searchLink><br /><searchLink fieldCode="DE" term="%22Africa%22">Africa</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: South America is a large continent situated mostly in the Southern Hemisphere (SH) with complex topography and diverse emissions sources. However, the atmospheric chemistry of this region has been historically understudied. Here, we employ the Multi‐Scale Infrastructure for Chemistry and Aerosols, a novel global circulation model with regional refinement capabilities and full chemistry, to explore the sources and distribution of the carbon monoxide (CO) tropospheric column in South America during 2019, and also to assess the effect that South American primary emissions have over the rest of the world. Most of the CO over South America can be explained either by non‐methane volatile organic compounds (NMVOC) secondary chemical production or by biomass burning emissions, with biomass burning as the main explanation for the variability in CO. Biomass burning in Central Africa is a relevant contributor to CO in all of the continent, including the southern tip. Biogenic emissions play a dual role in CO concentrations: they provide volatile organic compounds that contribute to the secondary CO production, but they also destroy OH, which limits the chemical production and destruction of CO. As a net effect, the lifetime of CO is extended to ∼120 days on average over the Amazon, while still being in the range of 30–60 days in the rest of South America. Plain Language Summary: We use the Multi‐Scale Infrastructure for Chemistry and Aerosols, a global model with regional refinement, to study the origins of carbon monoxide (CO) in South America during 2019. The main sources of CO are the secondary production from non‐volatile organic compounds and the biomass burning primary emissions. The main source of temporal variability in the whole are the biomass burning emissions. We show that biomass burning in central Africa is a relevant source of South American CO during all year in all of the continent, including the furthermost south. Key Points: We employ the Multi‐Scale infrastructure for Chemistry and Aerosols to quantify the budget of CO in South America during 2019Most of the variability in the CO burden is explained by the variability in biomass burning emissionsBiomass burning in Central Africa is a relevant contributor to CO in all of the continent, including the southern region [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Journal of Geophysical Research. Atmospheres is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1029/2023JD040434
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 17
        StartPage: 1
    Subjects:
      – SubjectFull: General circulation model
        Type: general
      – SubjectFull: Biomass burning
        Type: general
      – SubjectFull: Atmospheric chemistry
        Type: general
      – SubjectFull: Carbon monoxide
        Type: general
      – SubjectFull: Tropospheric chemistry
        Type: general
      – SubjectFull: Budget
        Type: general
      – SubjectFull: Tropospheric aerosols
        Type: general
      – SubjectFull: South America
        Type: general
      – SubjectFull: Africa
        Type: general
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      – TitleFull: Multiscale CO Budget Estimates Across South America: Quantifying Local Sources and Long Range Transport.
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              Text: Apr2024
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