Observations of hydroxyl and peroxy radicals and the impact of Br0 at Summit, Greenland in 2007 and 2008
The Greenland Summit Halogen-HO(x) (GSHOX) Campaign was performed in spring 2007 and summer 2008 to investigate the impact of halogens on HO(x) (= OH+HO(2)) cycling above the Greenland Ice Sheet. Chemical species including hydroxyl and peroxy radicals (OH and HO(2) + RO(2)), ozone (O(3)), nitrogen o...
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Language: | English |
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Copernicus Publications
2011
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Online Access: | http://nora.nerc.ac.uk/id/eprint/15262/ https://nora.nerc.ac.uk/id/eprint/15262/1/acp-11-8577-2011.pdf http://www.atmos-chem-phys.org/11/8577/2011/acp-11-8577-2011.pdf |
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ftnerc:oai:nora.nerc.ac.uk:15262 2023-05-15T16:27:46+02:00 Observations of hydroxyl and peroxy radicals and the impact of Br0 at Summit, Greenland in 2007 and 2008 Liao, J. Huey, L.G. Tanner, D.J. Brough, Neil Brooks, S. Dibb, J.E. Stutz, J. Thomas, J.L. Lefer, B. Haman, C. Gorham, K. 2011 text http://nora.nerc.ac.uk/id/eprint/15262/ https://nora.nerc.ac.uk/id/eprint/15262/1/acp-11-8577-2011.pdf http://www.atmos-chem-phys.org/11/8577/2011/acp-11-8577-2011.pdf en eng Copernicus Publications https://nora.nerc.ac.uk/id/eprint/15262/1/acp-11-8577-2011.pdf Liao, J.; Huey, L.G.; Tanner, D.J.; Brough, Neil orcid:0000-0002-2316-5292 Brooks, S.; Dibb, J.E.; Stutz, J.; Thomas, J.L.; Lefer, B.; Haman, C.; Gorham, K. 2011 Observations of hydroxyl and peroxy radicals and the impact of Br0 at Summit, Greenland in 2007 and 2008. Atmospheric Chemistry and Physics, 11 (16). 8577-8591. https://doi.org/10.5194/acp-11-8577-2011 <https://doi.org/10.5194/acp-11-8577-2011> Atmospheric Sciences Publication - Article PeerReviewed 2011 ftnerc https://doi.org/10.5194/acp-11-8577-2011 2023-02-04T19:29:44Z The Greenland Summit Halogen-HO(x) (GSHOX) Campaign was performed in spring 2007 and summer 2008 to investigate the impact of halogens on HO(x) (= OH+HO(2)) cycling above the Greenland Ice Sheet. Chemical species including hydroxyl and peroxy radicals (OH and HO(2) + RO(2)), ozone (O(3)), nitrogen oxide (NO), nitric acid (HNO(3)), nitrous acid (HONO), reactive gaseous mercury (RGM), and bromine oxide (BrO) were measured during the campaign. The median midday values of HO(2) + RO(2) and OH concentrations observed by chemical ionization mass spectrometry (CIMS) were 2.7x10(8) molec cm(-3) and 3.0x10(6) molec cm(-3) in spring 2007, and 4.2x10(8) molec cm(-3) and 4.1x10(6) molec cm(-3) in summer 2008. A basic photochemical 0-D box model highly constrained by observations of H(2)O, O(3), CO, CH(4), NO, and J values predicted HO(2) + RO(2) (R = 0.90, slope = 0.87 in 2007; R = 0.79, slope = 0.96 in 2008) reasonably well and under predicted OH (R = 0.83, slope = 0.72 in 2007; R = 0.76, slope = 0.54 in 2008). Constraining the model to HONO observations did not significantly improve the ratio of OH to HO(2) + RO(2) and the correlation between predictions and observations. Including bromine chemistry in the model constrained by observations of BrO improved the correlation between observed and predicted HO(2) + RO(2) and OH, and brought the average hourly OH and HO(2) + RO(2) predictions closer to the observations. These model comparisons confirmed our understanding of the dominant HO(x) sources and sinks in this environment and indicated that BrO impacted the OH levels at Summit. Although, significant discrepancies between observed and predicted OH could not be explained by the measured BrO. Finally, observations of enhanced RGM were found to be coincident with under prediction of OH. Article in Journal/Newspaper Greenland Ice Sheet Natural Environment Research Council: NERC Open Research Archive Greenland Atmospheric Chemistry and Physics 11 16 8577 8591 |
institution |
Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Atmospheric Sciences |
spellingShingle |
Atmospheric Sciences Liao, J. Huey, L.G. Tanner, D.J. Brough, Neil Brooks, S. Dibb, J.E. Stutz, J. Thomas, J.L. Lefer, B. Haman, C. Gorham, K. Observations of hydroxyl and peroxy radicals and the impact of Br0 at Summit, Greenland in 2007 and 2008 |
topic_facet |
Atmospheric Sciences |
description |
The Greenland Summit Halogen-HO(x) (GSHOX) Campaign was performed in spring 2007 and summer 2008 to investigate the impact of halogens on HO(x) (= OH+HO(2)) cycling above the Greenland Ice Sheet. Chemical species including hydroxyl and peroxy radicals (OH and HO(2) + RO(2)), ozone (O(3)), nitrogen oxide (NO), nitric acid (HNO(3)), nitrous acid (HONO), reactive gaseous mercury (RGM), and bromine oxide (BrO) were measured during the campaign. The median midday values of HO(2) + RO(2) and OH concentrations observed by chemical ionization mass spectrometry (CIMS) were 2.7x10(8) molec cm(-3) and 3.0x10(6) molec cm(-3) in spring 2007, and 4.2x10(8) molec cm(-3) and 4.1x10(6) molec cm(-3) in summer 2008. A basic photochemical 0-D box model highly constrained by observations of H(2)O, O(3), CO, CH(4), NO, and J values predicted HO(2) + RO(2) (R = 0.90, slope = 0.87 in 2007; R = 0.79, slope = 0.96 in 2008) reasonably well and under predicted OH (R = 0.83, slope = 0.72 in 2007; R = 0.76, slope = 0.54 in 2008). Constraining the model to HONO observations did not significantly improve the ratio of OH to HO(2) + RO(2) and the correlation between predictions and observations. Including bromine chemistry in the model constrained by observations of BrO improved the correlation between observed and predicted HO(2) + RO(2) and OH, and brought the average hourly OH and HO(2) + RO(2) predictions closer to the observations. These model comparisons confirmed our understanding of the dominant HO(x) sources and sinks in this environment and indicated that BrO impacted the OH levels at Summit. Although, significant discrepancies between observed and predicted OH could not be explained by the measured BrO. Finally, observations of enhanced RGM were found to be coincident with under prediction of OH. |
format |
Article in Journal/Newspaper |
author |
Liao, J. Huey, L.G. Tanner, D.J. Brough, Neil Brooks, S. Dibb, J.E. Stutz, J. Thomas, J.L. Lefer, B. Haman, C. Gorham, K. |
author_facet |
Liao, J. Huey, L.G. Tanner, D.J. Brough, Neil Brooks, S. Dibb, J.E. Stutz, J. Thomas, J.L. Lefer, B. Haman, C. Gorham, K. |
author_sort |
Liao, J. |
title |
Observations of hydroxyl and peroxy radicals and the impact of Br0 at Summit, Greenland in 2007 and 2008 |
title_short |
Observations of hydroxyl and peroxy radicals and the impact of Br0 at Summit, Greenland in 2007 and 2008 |
title_full |
Observations of hydroxyl and peroxy radicals and the impact of Br0 at Summit, Greenland in 2007 and 2008 |
title_fullStr |
Observations of hydroxyl and peroxy radicals and the impact of Br0 at Summit, Greenland in 2007 and 2008 |
title_full_unstemmed |
Observations of hydroxyl and peroxy radicals and the impact of Br0 at Summit, Greenland in 2007 and 2008 |
title_sort |
observations of hydroxyl and peroxy radicals and the impact of br0 at summit, greenland in 2007 and 2008 |
publisher |
Copernicus Publications |
publishDate |
2011 |
url |
http://nora.nerc.ac.uk/id/eprint/15262/ https://nora.nerc.ac.uk/id/eprint/15262/1/acp-11-8577-2011.pdf http://www.atmos-chem-phys.org/11/8577/2011/acp-11-8577-2011.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_relation |
https://nora.nerc.ac.uk/id/eprint/15262/1/acp-11-8577-2011.pdf Liao, J.; Huey, L.G.; Tanner, D.J.; Brough, Neil orcid:0000-0002-2316-5292 Brooks, S.; Dibb, J.E.; Stutz, J.; Thomas, J.L.; Lefer, B.; Haman, C.; Gorham, K. 2011 Observations of hydroxyl and peroxy radicals and the impact of Br0 at Summit, Greenland in 2007 and 2008. Atmospheric Chemistry and Physics, 11 (16). 8577-8591. https://doi.org/10.5194/acp-11-8577-2011 <https://doi.org/10.5194/acp-11-8577-2011> |
op_doi |
https://doi.org/10.5194/acp-11-8577-2011 |
container_title |
Atmospheric Chemistry and Physics |
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11 |
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16 |
container_start_page |
8577 |
op_container_end_page |
8591 |
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1766017283739615232 |