H2O2 in snow, air and open pore space in firn at Summit, Greenland
Measurements of H2O2 in firn gas down to a 1.7-m depth showed a consistent trend, with higher firn-gas concentrations generally associated with higher concentrations in the firn at the same depth. However, firn to firn-gas concentration ratios still exhibited a seasonal dependence, suggesting that f...
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ftunivbern:oai:boris.unibe.ch:158783 2023-08-20T04:06:55+02:00 H2O2 in snow, air and open pore space in firn at Summit, Greenland Bales, Roger C. Losleben, Mark V. McConnell, Joseph R. Fuhrer, Katrin Neftel, Albrecht 1995 application/pdf https://boris.unibe.ch/158783/1/bales95grl.pdf https://boris.unibe.ch/158783/ eng eng American Geophysical Union https://boris.unibe.ch/158783/ info:eu-repo/semantics/openAccess Bales, Roger C.; Losleben, Mark V.; McConnell, Joseph R.; Fuhrer, Katrin; Neftel, Albrecht (1995). H2O2 in snow, air and open pore space in firn at Summit, Greenland. Geophysical Research Letters, 22(10), pp. 1261-1264. American Geophysical Union 10.1029/95GL01110 <http://dx.doi.org/10.1029/95GL01110> 530 Physics info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 1995 ftunivbern https://doi.org/10.1029/95GL01110 2023-07-31T22:08:19Z Measurements of H2O2 in firn gas down to a 1.7-m depth showed a consistent trend, with higher firn-gas concentrations generally associated with higher concentrations in the firn at the same depth. However, firn to firn-gas concentration ratios still exhibited a seasonal dependence, suggesting that for summer layers equilibrium has not yet been reached. The time to reach equilibrium between firn and firn gas is at least weeks. Snowfall and fog deposit several times more H2O2 than the surface snow will retain at equilibrium, supporting the idea that surface snow is a temporary reservoir for H2O2. Thus from an equilibrium standpoint, the snow-pack should be a source of atmospheric H2O2 in the summer as well as fall, resulting in higher daytime concentrations than would occur based on just atmospheric photochemical reactions. But firn-gas measurements reported here were generally near or lower than those in the atmosphere, suggesting that degassing is too slow to significantly influence atmospheric H2O2 levels. Article in Journal/Newspaper Greenland BORIS (Bern Open Repository and Information System, University of Bern) Greenland Geophysical Research Letters 22 10 1261 1264 |
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Open Polar |
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BORIS (Bern Open Repository and Information System, University of Bern) |
op_collection_id |
ftunivbern |
language |
English |
topic |
530 Physics |
spellingShingle |
530 Physics Bales, Roger C. Losleben, Mark V. McConnell, Joseph R. Fuhrer, Katrin Neftel, Albrecht H2O2 in snow, air and open pore space in firn at Summit, Greenland |
topic_facet |
530 Physics |
description |
Measurements of H2O2 in firn gas down to a 1.7-m depth showed a consistent trend, with higher firn-gas concentrations generally associated with higher concentrations in the firn at the same depth. However, firn to firn-gas concentration ratios still exhibited a seasonal dependence, suggesting that for summer layers equilibrium has not yet been reached. The time to reach equilibrium between firn and firn gas is at least weeks. Snowfall and fog deposit several times more H2O2 than the surface snow will retain at equilibrium, supporting the idea that surface snow is a temporary reservoir for H2O2. Thus from an equilibrium standpoint, the snow-pack should be a source of atmospheric H2O2 in the summer as well as fall, resulting in higher daytime concentrations than would occur based on just atmospheric photochemical reactions. But firn-gas measurements reported here were generally near or lower than those in the atmosphere, suggesting that degassing is too slow to significantly influence atmospheric H2O2 levels. |
format |
Article in Journal/Newspaper |
author |
Bales, Roger C. Losleben, Mark V. McConnell, Joseph R. Fuhrer, Katrin Neftel, Albrecht |
author_facet |
Bales, Roger C. Losleben, Mark V. McConnell, Joseph R. Fuhrer, Katrin Neftel, Albrecht |
author_sort |
Bales, Roger C. |
title |
H2O2 in snow, air and open pore space in firn at Summit, Greenland |
title_short |
H2O2 in snow, air and open pore space in firn at Summit, Greenland |
title_full |
H2O2 in snow, air and open pore space in firn at Summit, Greenland |
title_fullStr |
H2O2 in snow, air and open pore space in firn at Summit, Greenland |
title_full_unstemmed |
H2O2 in snow, air and open pore space in firn at Summit, Greenland |
title_sort |
h2o2 in snow, air and open pore space in firn at summit, greenland |
publisher |
American Geophysical Union |
publishDate |
1995 |
url |
https://boris.unibe.ch/158783/1/bales95grl.pdf https://boris.unibe.ch/158783/ |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Bales, Roger C.; Losleben, Mark V.; McConnell, Joseph R.; Fuhrer, Katrin; Neftel, Albrecht (1995). H2O2 in snow, air and open pore space in firn at Summit, Greenland. Geophysical Research Letters, 22(10), pp. 1261-1264. American Geophysical Union 10.1029/95GL01110 <http://dx.doi.org/10.1029/95GL01110> |
op_relation |
https://boris.unibe.ch/158783/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/95GL01110 |
container_title |
Geophysical Research Letters |
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22 |
container_issue |
10 |
container_start_page |
1261 |
op_container_end_page |
1264 |
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1774718289864294400 |