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Publication:
H2O2 in snow, air and open pore space in firn at Summit, Greenland

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dc.contributor.authorBales, Roger C.
dc.contributor.authorLosleben, Mark V.
dc.contributor.authorMcConnell, Joseph R.
dc.contributor.authorFuhrer, Katrin
dc.contributor.authorNeftel, Albrecht
dc.date.accessioned2024-09-02T17:49:58Z
dc.date.available2024-09-02T17:49:58Z
dc.date.issued1995
dc.description.abstractMeasurements 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.
dc.description.numberOfPages4
dc.identifier.doi10.48350/158783
dc.identifier.publisherDOI10.1029/95GL01110
dc.identifier.urihttps://boris-portal.unibe.ch/handle/20.500.12422/43389
dc.language.isoen
dc.publisherAmerican Geophysical Union
dc.relation.ispartofGeophysical Research Letters
dc.relation.issn0094-8276
dc.relation.organizationDCD5A442BF29E17DE0405C82790C4DE2
dc.subject.ddc500 - Science::530 - Physics
dc.titleH2O2 in snow, air and open pore space in firn at Summit, Greenland
dc.typearticle
dspace.entity.typePublication
oaire.citation.endPage1264
oaire.citation.issue10
oaire.citation.startPage1261
oaire.citation.volume22
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unibe.date.licenseChanged2021-09-07 12:27:46
unibe.description.ispublishedpub
unibe.eprints.legacyId158783
unibe.journal.abbrevTitleGEOPHYS RES LETT
unibe.refereedTRUE
unibe.subtype.articlejournal

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