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Chemical Signatures of Seasonally Unique Anthropogenic Influences on Organic Aerosol Composition in the Central Amazon.
Franklin, Emily B; Yee, Lindsay D; Wernis, Rebecca; Isaacman-VanWertz, Gabriel; Kreisberg, Nathan; Weber, Robert; Zhang, Haofei; Palm, Brett B; Hu, Weiwei; Campuzano-Jost, Pedro; Day, Douglas A; Manzi, Antonio; Artaxo, Paulo; Souza, Rodrigo A F De; Jimenez, Jose L; Martin, Scot T; Goldstein, Allen H.
Afiliação
  • Franklin EB; Department of Civil and Environmental Engineering, University of California Berkeley, Berkeley, California 94720, United States.
  • Yee LD; Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States.
  • Wernis R; Department of Environmental Science, Policy and Management, University of California Berkeley, Berkeley, California 94720, United States.
  • Isaacman-VanWertz G; Department of Civil and Environmental Engineering, University of California Berkeley, Berkeley, California 94720, United States.
  • Kreisberg N; Department of Environmental Science, Policy and Management, University of California Berkeley, Berkeley, California 94720, United States.
  • Weber R; Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States.
  • Zhang H; Aerosol Dynamics, Inc., Berkeley, California 94710, United States.
  • Palm BB; Department of Environmental Science, Policy and Management, University of California Berkeley, Berkeley, California 94720, United States.
  • Hu W; Department of Environmental Science, Policy and Management, University of California Berkeley, Berkeley, California 94720, United States.
  • Campuzano-Jost P; Department of Chemistry, University of California, Riverside, California 92521, United States.
  • Day DA; Department of Chemistry and Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado, Boulder, Colorado 80309, United States.
  • Manzi A; Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, Colorado 80301, United States.
  • Artaxo P; Department of Chemistry and Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado, Boulder, Colorado 80309, United States.
  • Souza RAF; State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
  • Jimenez JL; Department of Chemistry and Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado, Boulder, Colorado 80309, United States.
  • Martin ST; Department of Chemistry and Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado, Boulder, Colorado 80309, United States.
  • Goldstein AH; Instituto Nacional de Pesquisas Espaciais (INPE), Cachoeira Paulista 12630-000, São Paulo, Brazil.
Environ Sci Technol ; 57(15): 6263-6272, 2023 04 18.
Article em En | MEDLINE | ID: mdl-37011031
ABSTRACT
Urbanization and fires perturb the quantities and composition of fine organic aerosol in the central Amazon, with ramifications for radiative forcing and public health. These disturbances include not only direct emissions of particulates and secondary organic aerosol (SOA) precursors but also changes in the pathways through which biogenic precursors form SOA. The composition of ambient organic aerosol is complex and incompletely characterized, encompassing millions of potential structures relatively few of which have been synthesized and characterized. Through analysis of submicron aerosol samples from the Green Ocean Amazon (GoAmazon2014/5) field campaign by two-dimensional gas chromatography coupled with machine learning, ∼1300 unique compounds were traced and characterized over two seasons. Fires and urban emissions produced chemically and interseasonally distinct impacts on product signatures, with only ∼50% of compounds observed in both seasons. Seasonally unique populations point to the importance of aqueous processing in Amazonian aerosol aging, but further mechanistic insights are impeded by limited product identity knowledge. Less than 10% of compounds were identifiable at an isomer-specific level. Overall, the findings (i) provide compositional characterization of anthropogenic influence on submicron organic aerosol in the Amazon, (ii) identify key season-to-season differences in chemical signatures, and (iii) highlight high-priority knowledge gaps in current speciated knowledge.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Atmosféricos Tipo de estudo: Prognostic_studies Idioma: En Revista: Environ Sci Technol Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Estados Unidos
Texto completo
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Atmosféricos Tipo de estudo: Prognostic_studies Idioma: En Revista: Environ Sci Technol Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Estados Unidos