Impacts of snowpack emissions on deduced levels of OH and peroxy radicals at Summit, Greenland
Levels of OH and peroxy radicals in the atmospheric boundary layer at Summit, Greenland, a location surrounded by snow from which HOx radical precursors are known to be emitted, were deduced using steady-state analyses applied to (OH+HO2+CH3O2), (OH+HO2), and OH–HO2 cycling. The results indicate tha...
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ftuninhampshire:oai:scholars.unh.edu:earthsci_facpub-1123 2023-05-15T15:06:10+02:00 Impacts of snowpack emissions on deduced levels of OH and peroxy radicals at Summit, Greenland Yang, J Honrath, R E Peterson, Matthew C Dibb, Jack E. Sumner, A L Shepson, P B Frey, Markus M Jacobi, H W Swanson, Aaron L Blake, N J 2002-05-01T07:00:00Z text/html https://scholars.unh.edu/earthsci_facpub/124 https://doi.org/10.1016/S1352-2310(02)00128-0 unknown University of New Hampshire Scholars' Repository https://scholars.unh.edu/earthsci_facpub/124 http://dx.doi.org/10.1016/S1352-2310(02)00128-0 Copyright © 2002 Elsevier Science Ltd. All rights reserved. Earth Sciences Scholarship HOx Oxidants Steady-state model Arctic boundary layer Ice photochemistry Atmospheric Sciences text 2002 ftuninhampshire https://doi.org/10.1016/S1352-2310(02)00128-0 2023-01-30T21:34:20Z Levels of OH and peroxy radicals in the atmospheric boundary layer at Summit, Greenland, a location surrounded by snow from which HOx radical precursors are known to be emitted, were deduced using steady-state analyses applied to (OH+HO2+CH3O2), (OH+HO2), and OH–HO2 cycling. The results indicate that HOx levels at Summit are significantly increased over those that would result from O3 photolysis alone, as a result of elevated concentrations of HONO, HCHO, H2O2, and other compounds. Estimated midday levels of (HO2+CH3O2) reached 30– during two summer seasons. Calculated OH concentrations averaged between 05:00 and 20:00 (or 21:00) exceeded 4×106 molecules cm−3, comparable to (or higher than) levels expected in the tropical marine boundary layer. These findings imply rapid photochemical cycling within the boundary layer at Summit, as well as in the upper pore spaces of the surface snowpack. The photolysis rate constants and OH levels calculated here imply that gas-phase photochemistry plays a significant role in the budgets of NOx, HCHO, H2O2, HONO, and O3, compounds that are also directly affected by processes within the snowpack. Text Arctic Greenland University of New Hampshire: Scholars Repository Arctic Greenland Atmospheric Environment 36 15-16 2523 2534 |
institution |
Open Polar |
collection |
University of New Hampshire: Scholars Repository |
op_collection_id |
ftuninhampshire |
language |
unknown |
topic |
HOx Oxidants Steady-state model Arctic boundary layer Ice photochemistry Atmospheric Sciences |
spellingShingle |
HOx Oxidants Steady-state model Arctic boundary layer Ice photochemistry Atmospheric Sciences Yang, J Honrath, R E Peterson, Matthew C Dibb, Jack E. Sumner, A L Shepson, P B Frey, Markus M Jacobi, H W Swanson, Aaron L Blake, N J Impacts of snowpack emissions on deduced levels of OH and peroxy radicals at Summit, Greenland |
topic_facet |
HOx Oxidants Steady-state model Arctic boundary layer Ice photochemistry Atmospheric Sciences |
description |
Levels of OH and peroxy radicals in the atmospheric boundary layer at Summit, Greenland, a location surrounded by snow from which HOx radical precursors are known to be emitted, were deduced using steady-state analyses applied to (OH+HO2+CH3O2), (OH+HO2), and OH–HO2 cycling. The results indicate that HOx levels at Summit are significantly increased over those that would result from O3 photolysis alone, as a result of elevated concentrations of HONO, HCHO, H2O2, and other compounds. Estimated midday levels of (HO2+CH3O2) reached 30– during two summer seasons. Calculated OH concentrations averaged between 05:00 and 20:00 (or 21:00) exceeded 4×106 molecules cm−3, comparable to (or higher than) levels expected in the tropical marine boundary layer. These findings imply rapid photochemical cycling within the boundary layer at Summit, as well as in the upper pore spaces of the surface snowpack. The photolysis rate constants and OH levels calculated here imply that gas-phase photochemistry plays a significant role in the budgets of NOx, HCHO, H2O2, HONO, and O3, compounds that are also directly affected by processes within the snowpack. |
format |
Text |
author |
Yang, J Honrath, R E Peterson, Matthew C Dibb, Jack E. Sumner, A L Shepson, P B Frey, Markus M Jacobi, H W Swanson, Aaron L Blake, N J |
author_facet |
Yang, J Honrath, R E Peterson, Matthew C Dibb, Jack E. Sumner, A L Shepson, P B Frey, Markus M Jacobi, H W Swanson, Aaron L Blake, N J |
author_sort |
Yang, J |
title |
Impacts of snowpack emissions on deduced levels of OH and peroxy radicals at Summit, Greenland |
title_short |
Impacts of snowpack emissions on deduced levels of OH and peroxy radicals at Summit, Greenland |
title_full |
Impacts of snowpack emissions on deduced levels of OH and peroxy radicals at Summit, Greenland |
title_fullStr |
Impacts of snowpack emissions on deduced levels of OH and peroxy radicals at Summit, Greenland |
title_full_unstemmed |
Impacts of snowpack emissions on deduced levels of OH and peroxy radicals at Summit, Greenland |
title_sort |
impacts of snowpack emissions on deduced levels of oh and peroxy radicals at summit, greenland |
publisher |
University of New Hampshire Scholars' Repository |
publishDate |
2002 |
url |
https://scholars.unh.edu/earthsci_facpub/124 https://doi.org/10.1016/S1352-2310(02)00128-0 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland |
genre_facet |
Arctic Greenland |
op_source |
Earth Sciences Scholarship |
op_relation |
https://scholars.unh.edu/earthsci_facpub/124 http://dx.doi.org/10.1016/S1352-2310(02)00128-0 |
op_rights |
Copyright © 2002 Elsevier Science Ltd. All rights reserved. |
op_doi |
https://doi.org/10.1016/S1352-2310(02)00128-0 |
container_title |
Atmospheric Environment |
container_volume |
36 |
container_issue |
15-16 |
container_start_page |
2523 |
op_container_end_page |
2534 |
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1766337818044399616 |