Chemical characteristics of North American surface layer outflow: Insights from Chebogue Point, Nova Scotia
We present a factor analysis-based method for differentiating air masses on the basis of source influence and apply the method to a broad suite of trace gas and aerosol measurements collected at Chebogue Point, Nova Scotia, during the summer of 2004 to characterize the chemical composition of atmosp...
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Online Access: | https://research.manchester.ac.uk/en/publications/da132f0e-f954-4980-84f7-a69a36733061 https://doi.org/10.1029/2006JD007287 http://://000240334500001 |
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ftumanchesterpub:oai:pure.atira.dk:publications/da132f0e-f954-4980-84f7-a69a36733061 2023-11-12T04:22:31+01:00 Chemical characteristics of North American surface layer outflow: Insights from Chebogue Point, Nova Scotia Millet, Dylan B. Goldstein, Allen H. Holzinger, Rupert Williams, Brent J. Allan, James D. Jimenez, José L. Worsnop, Douglas R. Roberts, James M. White, Allen B. Hudman, Rynda C. Bertschi, Isaac T. Stohl, Andreas 2006-12-16 https://research.manchester.ac.uk/en/publications/da132f0e-f954-4980-84f7-a69a36733061 https://doi.org/10.1029/2006JD007287 http://://000240334500001 eng eng info:eu-repo/semantics/closedAccess Millet , D B , Goldstein , A H , Holzinger , R , Williams , B J , Allan , J D , Jimenez , J L , Worsnop , D R , Roberts , J M , White , A B , Hudman , R C , Bertschi , I T & Stohl , A 2006 , ' Chemical characteristics of North American surface layer outflow: Insights from Chebogue Point, Nova Scotia ' , Journal of Geophysical Research: Atmospheres , vol. 111 , no. 23 , D23S53 . https://doi.org/10.1029/2006JD007287 article 2006 ftumanchesterpub https://doi.org/10.1029/2006JD007287 2023-10-30T09:19:08Z We present a factor analysis-based method for differentiating air masses on the basis of source influence and apply the method to a broad suite of trace gas and aerosol measurements collected at Chebogue Point, Nova Scotia, during the summer of 2004 to characterize the chemical composition of atmospheric outflow from eastern North America. CO3, ozone, and aerosol mass were elevated by 30%, 56%, and more than 300% at Chebogue Point during U.S. outflow periods. Organic aerosol mass was highest during U.S. pollution events, but made up the largest fraction (70%) of the total aerosol during periods of primary and especially secondary biogenic influence, indicating the importance of both anthropogenic and biogenic organic aerosol. Anthropogenic and oxygenated volatile organic compounds account for the bulk of the gas-phase organic carbon under most conditions; however, biogenic compounds are important in terms of chemical reactivity. Biogenic emissions thus have a significant impact on the chemistry of air masses downwind of the polluted northeastern United States. Using output from a global 3-D model of atmospheric composition (GEOS-Chem), we estimate that CO directly emitted from U.S. pollution sources makes up 28% of the total CO observed at Chebogue Point during U.S. outflow events and 19% at other times, although more work is needed to improve U.S. emission estimates for CO and other pollutants. We conclude that the effects of North American pollution on the chemistry of the western North Atlantic boundary layer are pervasive and not restricted to particular events. Copyright 2006 by the American Geophysical Union. Article in Journal/Newspaper North Atlantic The University of Manchester: Research Explorer Journal of Geophysical Research: Atmospheres 111 D23 |
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The University of Manchester: Research Explorer |
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ftumanchesterpub |
language |
English |
description |
We present a factor analysis-based method for differentiating air masses on the basis of source influence and apply the method to a broad suite of trace gas and aerosol measurements collected at Chebogue Point, Nova Scotia, during the summer of 2004 to characterize the chemical composition of atmospheric outflow from eastern North America. CO3, ozone, and aerosol mass were elevated by 30%, 56%, and more than 300% at Chebogue Point during U.S. outflow periods. Organic aerosol mass was highest during U.S. pollution events, but made up the largest fraction (70%) of the total aerosol during periods of primary and especially secondary biogenic influence, indicating the importance of both anthropogenic and biogenic organic aerosol. Anthropogenic and oxygenated volatile organic compounds account for the bulk of the gas-phase organic carbon under most conditions; however, biogenic compounds are important in terms of chemical reactivity. Biogenic emissions thus have a significant impact on the chemistry of air masses downwind of the polluted northeastern United States. Using output from a global 3-D model of atmospheric composition (GEOS-Chem), we estimate that CO directly emitted from U.S. pollution sources makes up 28% of the total CO observed at Chebogue Point during U.S. outflow events and 19% at other times, although more work is needed to improve U.S. emission estimates for CO and other pollutants. We conclude that the effects of North American pollution on the chemistry of the western North Atlantic boundary layer are pervasive and not restricted to particular events. Copyright 2006 by the American Geophysical Union. |
format |
Article in Journal/Newspaper |
author |
Millet, Dylan B. Goldstein, Allen H. Holzinger, Rupert Williams, Brent J. Allan, James D. Jimenez, José L. Worsnop, Douglas R. Roberts, James M. White, Allen B. Hudman, Rynda C. Bertschi, Isaac T. Stohl, Andreas |
spellingShingle |
Millet, Dylan B. Goldstein, Allen H. Holzinger, Rupert Williams, Brent J. Allan, James D. Jimenez, José L. Worsnop, Douglas R. Roberts, James M. White, Allen B. Hudman, Rynda C. Bertschi, Isaac T. Stohl, Andreas Chemical characteristics of North American surface layer outflow: Insights from Chebogue Point, Nova Scotia |
author_facet |
Millet, Dylan B. Goldstein, Allen H. Holzinger, Rupert Williams, Brent J. Allan, James D. Jimenez, José L. Worsnop, Douglas R. Roberts, James M. White, Allen B. Hudman, Rynda C. Bertschi, Isaac T. Stohl, Andreas |
author_sort |
Millet, Dylan B. |
title |
Chemical characteristics of North American surface layer outflow: Insights from Chebogue Point, Nova Scotia |
title_short |
Chemical characteristics of North American surface layer outflow: Insights from Chebogue Point, Nova Scotia |
title_full |
Chemical characteristics of North American surface layer outflow: Insights from Chebogue Point, Nova Scotia |
title_fullStr |
Chemical characteristics of North American surface layer outflow: Insights from Chebogue Point, Nova Scotia |
title_full_unstemmed |
Chemical characteristics of North American surface layer outflow: Insights from Chebogue Point, Nova Scotia |
title_sort |
chemical characteristics of north american surface layer outflow: insights from chebogue point, nova scotia |
publishDate |
2006 |
url |
https://research.manchester.ac.uk/en/publications/da132f0e-f954-4980-84f7-a69a36733061 https://doi.org/10.1029/2006JD007287 http://://000240334500001 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Millet , D B , Goldstein , A H , Holzinger , R , Williams , B J , Allan , J D , Jimenez , J L , Worsnop , D R , Roberts , J M , White , A B , Hudman , R C , Bertschi , I T & Stohl , A 2006 , ' Chemical characteristics of North American surface layer outflow: Insights from Chebogue Point, Nova Scotia ' , Journal of Geophysical Research: Atmospheres , vol. 111 , no. 23 , D23S53 . https://doi.org/10.1029/2006JD007287 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1029/2006JD007287 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
111 |
container_issue |
D23 |
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1782337556144193536 |