Humid Summers Promote Urban Aqueous‐Phase Production of Oxygenated Organic Aerosol in the Northeastern United States
Abstract Aqueous‐phase uptake and processing of water‐soluble organic compounds can promote secondary organic aerosol (SOA) production. We evaluated the contributions of aqueous‐phase chemistry to summertime urban SOA at two sites in New York City. The relative role of aqueous‐phase processing varie...
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| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2025-02-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL112005 |
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| author | Mitchell J. Rogers Taekyu Joo Tori Hass‐Mitchell Manjula R. Canagaratna Pedro Campuzano‐Jost Donna Sueper Mia N. Tran Jo E. Machesky Joseph R. Roscioli Jose L. Jimenez Jordan E. Krechmer Andrew T. Lambe Benjamin A. Nault Drew R. Gentner |
| author_facet | Mitchell J. Rogers Taekyu Joo Tori Hass‐Mitchell Manjula R. Canagaratna Pedro Campuzano‐Jost Donna Sueper Mia N. Tran Jo E. Machesky Joseph R. Roscioli Jose L. Jimenez Jordan E. Krechmer Andrew T. Lambe Benjamin A. Nault Drew R. Gentner |
| author_sort | Mitchell J. Rogers |
| collection | DOAJ |
| description | Abstract Aqueous‐phase uptake and processing of water‐soluble organic compounds can promote secondary organic aerosol (SOA) production. We evaluated the contributions of aqueous‐phase chemistry to summertime urban SOA at two sites in New York City. The relative role of aqueous‐phase processing varied with chemical and environmental conditions, with evident daytime SOA enhancements (e.g., >1 μg/m3) during periods with relative humidities (RH) exceeding 65% and often higher temperatures. Oxygenated organic aerosol (OOA) production was also sensitive to secondary inorganic aerosols, in part through their influence on aerosol liquid water. On average, high‐RH periods exhibited a 69% increase in less‐oxidized OOA production in Queens, NY. These enhancements coincided with southerly backward trajectories and greater inorganic aerosol concentrations, yet showed substantial intra‐city variability between Queens and Manhattan. The observed aqueous‐phase SOA production, even with historically low sulfate and nitrate aerosol loadings, highlights both opportunities and challenges for continued reductions in summertime PM2.5 in urban communities. |
| format | Article |
| id | doaj-art-209d15524d2a4fe6affddfe98fac23d8 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-209d15524d2a4fe6affddfe98fac23d82025-08-20T01:50:41ZengWileyGeophysical Research Letters0094-82761944-80072025-02-01524n/an/a10.1029/2024GL112005Humid Summers Promote Urban Aqueous‐Phase Production of Oxygenated Organic Aerosol in the Northeastern United StatesMitchell J. Rogers0Taekyu Joo1Tori Hass‐Mitchell2Manjula R. Canagaratna3Pedro Campuzano‐Jost4Donna Sueper5Mia N. Tran6Jo E. Machesky7Joseph R. Roscioli8Jose L. Jimenez9Jordan E. Krechmer10Andrew T. Lambe11Benjamin A. Nault12Drew R. Gentner13Department of Chemical and Environmental Engineering Yale University New Haven CT USADepartment of Chemical and Environmental Engineering Yale University New Haven CT USADepartment of Chemical and Environmental Engineering Yale University New Haven CT USAAerodyne Research, Inc. Billerica MA USADepartment of Chemistry University of Colorado Boulder Boulder CO USAAerodyne Research, Inc. Billerica MA USADepartment of Chemical and Environmental Engineering Yale University New Haven CT USADepartment of Chemical and Environmental Engineering Yale University New Haven CT USAAerodyne Research, Inc. Billerica MA USADepartment of Chemistry University of Colorado Boulder Boulder CO USAAerodyne Research, Inc. Billerica MA USAAerodyne Research, Inc. Billerica MA USAAerodyne Research, Inc. Billerica MA USADepartment of Chemical and Environmental Engineering Yale University New Haven CT USAAbstract Aqueous‐phase uptake and processing of water‐soluble organic compounds can promote secondary organic aerosol (SOA) production. We evaluated the contributions of aqueous‐phase chemistry to summertime urban SOA at two sites in New York City. The relative role of aqueous‐phase processing varied with chemical and environmental conditions, with evident daytime SOA enhancements (e.g., >1 μg/m3) during periods with relative humidities (RH) exceeding 65% and often higher temperatures. Oxygenated organic aerosol (OOA) production was also sensitive to secondary inorganic aerosols, in part through their influence on aerosol liquid water. On average, high‐RH periods exhibited a 69% increase in less‐oxidized OOA production in Queens, NY. These enhancements coincided with southerly backward trajectories and greater inorganic aerosol concentrations, yet showed substantial intra‐city variability between Queens and Manhattan. The observed aqueous‐phase SOA production, even with historically low sulfate and nitrate aerosol loadings, highlights both opportunities and challenges for continued reductions in summertime PM2.5 in urban communities.https://doi.org/10.1029/2024GL112005aerosolsorganic aerosolurban pollution |
| spellingShingle | Mitchell J. Rogers Taekyu Joo Tori Hass‐Mitchell Manjula R. Canagaratna Pedro Campuzano‐Jost Donna Sueper Mia N. Tran Jo E. Machesky Joseph R. Roscioli Jose L. Jimenez Jordan E. Krechmer Andrew T. Lambe Benjamin A. Nault Drew R. Gentner Humid Summers Promote Urban Aqueous‐Phase Production of Oxygenated Organic Aerosol in the Northeastern United States Geophysical Research Letters aerosols organic aerosol urban pollution |
| title | Humid Summers Promote Urban Aqueous‐Phase Production of Oxygenated Organic Aerosol in the Northeastern United States |
| title_full | Humid Summers Promote Urban Aqueous‐Phase Production of Oxygenated Organic Aerosol in the Northeastern United States |
| title_fullStr | Humid Summers Promote Urban Aqueous‐Phase Production of Oxygenated Organic Aerosol in the Northeastern United States |
| title_full_unstemmed | Humid Summers Promote Urban Aqueous‐Phase Production of Oxygenated Organic Aerosol in the Northeastern United States |
| title_short | Humid Summers Promote Urban Aqueous‐Phase Production of Oxygenated Organic Aerosol in the Northeastern United States |
| title_sort | humid summers promote urban aqueous phase production of oxygenated organic aerosol in the northeastern united states |
| topic | aerosols organic aerosol urban pollution |
| url | https://doi.org/10.1029/2024GL112005 |
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