Observations of hydroxyl and the sum of peroxy radicals at Summit, Greenland during summer 2003
The first measurements of peroxy (HO2+RO2) and hydroxyl (OH) radicals above the arctic snowpack were collected during the summer 2003 campaign at Summit, Greenland. The median measured number densities for peroxy and hydroxyl radicals were 2.2×108mol cm-3and 6.4×106mol cm-3, respectively. The observ...
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Language: | English |
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ftcdlib:qt2276g7qw 2023-05-15T15:06:22+02:00 Observations of hydroxyl and the sum of peroxy radicals at Summit, Greenland during summer 2003 Sjostedt, SJ Huey, LG Tanner, DJ Peischl, J Chen, G Dibb, JE Lefer, B Hutterli, MA Beyersdorf, AJ Blake, NJ Blake, DR Sueper, D Ryerson, T Burkhart, J Stohl, A 5122 - 5137 2007-08-01 application/pdf http://www.escholarship.org/uc/item/2276g7qw english eng eScholarship, University of California qt2276g7qw http://www.escholarship.org/uc/item/2276g7qw Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ CC-BY Sjostedt, SJ; Huey, LG; Tanner, DJ; Peischl, J; Chen, G; Dibb, JE; et al.(2007). Observations of hydroxyl and the sum of peroxy radicals at Summit, Greenland during summer 2003. Atmospheric Environment, 41(24), 5122 - 5137. doi:10.1016/j.atmosenv.2006.06.065. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/2276g7qw article 2007 ftcdlib https://doi.org/10.1016/j.atmosenv.2006.06.065 2018-07-13T22:52:18Z The first measurements of peroxy (HO2+RO2) and hydroxyl (OH) radicals above the arctic snowpack were collected during the summer 2003 campaign at Summit, Greenland. The median measured number densities for peroxy and hydroxyl radicals were 2.2×108mol cm-3and 6.4×106mol cm-3, respectively. The observed peroxy radical values are in excellent agreement (R2= 0.83, M / O = 1.06) with highly constrained model predictions. However, calculated hydroxyl number densities are consistently more than a factor of 2 lower than the observed values. These results indicate that our current understanding of radical sources and sinks is in accord with our observations in this environment but that there may be a mechanism that is perturbing the (HO2+RO2)/OH ratio. This observed ratio was also found to depend on meteorological conditions especially during periods of high winds accompanied by blowing snow. Backward transport model simulations indicate that these periods of high winds were characterized by rapid transport (1-2 days) of marine boundary layer air to Summit. These data suggest that the boundary layer photochemistry at Summit may be periodically impacted by halogens. © 2007. Article in Journal/Newspaper Arctic Greenland University of California: eScholarship Arctic Greenland Atmospheric Environment 41 24 5122 5137 |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
English |
description |
The first measurements of peroxy (HO2+RO2) and hydroxyl (OH) radicals above the arctic snowpack were collected during the summer 2003 campaign at Summit, Greenland. The median measured number densities for peroxy and hydroxyl radicals were 2.2×108mol cm-3and 6.4×106mol cm-3, respectively. The observed peroxy radical values are in excellent agreement (R2= 0.83, M / O = 1.06) with highly constrained model predictions. However, calculated hydroxyl number densities are consistently more than a factor of 2 lower than the observed values. These results indicate that our current understanding of radical sources and sinks is in accord with our observations in this environment but that there may be a mechanism that is perturbing the (HO2+RO2)/OH ratio. This observed ratio was also found to depend on meteorological conditions especially during periods of high winds accompanied by blowing snow. Backward transport model simulations indicate that these periods of high winds were characterized by rapid transport (1-2 days) of marine boundary layer air to Summit. These data suggest that the boundary layer photochemistry at Summit may be periodically impacted by halogens. © 2007. |
format |
Article in Journal/Newspaper |
author |
Sjostedt, SJ Huey, LG Tanner, DJ Peischl, J Chen, G Dibb, JE Lefer, B Hutterli, MA Beyersdorf, AJ Blake, NJ Blake, DR Sueper, D Ryerson, T Burkhart, J Stohl, A |
spellingShingle |
Sjostedt, SJ Huey, LG Tanner, DJ Peischl, J Chen, G Dibb, JE Lefer, B Hutterli, MA Beyersdorf, AJ Blake, NJ Blake, DR Sueper, D Ryerson, T Burkhart, J Stohl, A Observations of hydroxyl and the sum of peroxy radicals at Summit, Greenland during summer 2003 |
author_facet |
Sjostedt, SJ Huey, LG Tanner, DJ Peischl, J Chen, G Dibb, JE Lefer, B Hutterli, MA Beyersdorf, AJ Blake, NJ Blake, DR Sueper, D Ryerson, T Burkhart, J Stohl, A |
author_sort |
Sjostedt, SJ |
title |
Observations of hydroxyl and the sum of peroxy radicals at Summit, Greenland during summer 2003 |
title_short |
Observations of hydroxyl and the sum of peroxy radicals at Summit, Greenland during summer 2003 |
title_full |
Observations of hydroxyl and the sum of peroxy radicals at Summit, Greenland during summer 2003 |
title_fullStr |
Observations of hydroxyl and the sum of peroxy radicals at Summit, Greenland during summer 2003 |
title_full_unstemmed |
Observations of hydroxyl and the sum of peroxy radicals at Summit, Greenland during summer 2003 |
title_sort |
observations of hydroxyl and the sum of peroxy radicals at summit, greenland during summer 2003 |
publisher |
eScholarship, University of California |
publishDate |
2007 |
url |
http://www.escholarship.org/uc/item/2276g7qw |
op_coverage |
5122 - 5137 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland |
genre_facet |
Arctic Greenland |
op_source |
Sjostedt, SJ; Huey, LG; Tanner, DJ; Peischl, J; Chen, G; Dibb, JE; et al.(2007). Observations of hydroxyl and the sum of peroxy radicals at Summit, Greenland during summer 2003. Atmospheric Environment, 41(24), 5122 - 5137. doi:10.1016/j.atmosenv.2006.06.065. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/2276g7qw |
op_relation |
qt2276g7qw http://www.escholarship.org/uc/item/2276g7qw |
op_rights |
Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.atmosenv.2006.06.065 |
container_title |
Atmospheric Environment |
container_volume |
41 |
container_issue |
24 |
container_start_page |
5122 |
op_container_end_page |
5137 |
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1766337996696584192 |