Impact of temperature-driven cycling of hydrogen peroxide (H2O2) between air and snow on the planetary boundary layer
Hydrogen peroxide (H2O2) contributes to the atmospheres oxidizing capacity, which determinesthe lifetime of atmospheric trace species. Measured bidirectional summertime H2O2 fluxes fromthe snowpack at Summit, Greenland, in June 1996 reveal a daytime H2O2 release from thesurface snow reservoir and a...
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ftawi:oai:epic.awi.de:4468 2024-09-15T18:09:54+00:00 Impact of temperature-driven cycling of hydrogen peroxide (H2O2) between air and snow on the planetary boundary layer Hutterli, M. A. McConnell, J. R. Stewart, R. W. Jacobi, Hans-Werner Bales, R. C. 2001 application/pdf https://epic.awi.de/id/eprint/4468/ https://epic.awi.de/id/eprint/4468/1/Hut2001a.pdf https://hdl.handle.net/10013/epic.15043 https://hdl.handle.net/10013/epic.15043.d001 unknown https://epic.awi.de/id/eprint/4468/1/Hut2001a.pdf https://hdl.handle.net/10013/epic.15043.d001 Hutterli, M. A. , McConnell, J. R. , Stewart, R. W. , Jacobi, H. W. and Bales, R. C. (2001) Impact of temperature-driven cycling of hydrogen peroxide (H2O2) between air and snow on the planetary boundary layer , Journal of Geophysical Research, 106 , pp. 15395-15404 . hdl:10013/epic.15043 EPIC3Journal of Geophysical Research, 106, pp. 15395-15404 Article isiRev 2001 ftawi 2024-06-24T03:54:51Z Hydrogen peroxide (H2O2) contributes to the atmospheres oxidizing capacity, which determinesthe lifetime of atmospheric trace species. Measured bidirectional summertime H2O2 fluxes fromthe snowpack at Summit, Greenland, in June 1996 reveal a daytime H2O2 release from thesurface snow reservoir and a partial redeposition at night. The observations also provide the firstdirect evidence of a strong net summertime H2O2 release from the snowpack, enhancing averageboundary layer H2O2 concentrations approximately sevenfold and the OH and HO2concentrations by 70% and 50%, respectively, relative to that estimated from photochemicalmodeling in the absence of the snowpack source. The total H2O2 release over a 12-day periodwas of the order of 5 * 10(13) molecules m(-2) s(-1) and compares well with observed concentrationchanges in the top snow layer. Photochemical and air-snow interaction modeling indicate thatthe net snowpack release is driven by temperature-induced uptake and release of H2O2 asdeposited snow, which is supersaturated with respect to ice-air partitioning, approachesequilibrium. The results show that the physical cycling of H2O2 and possibly other volatilespecies is a key to understanding snowpacks as complex physical-photochemical reactors and hasfar reaching implications for the interpretation of ice core records as well as for thephotochemistry in polar regions and in the vicinity of snowpacks in general. Article in Journal/Newspaper Greenland ice core Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
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description |
Hydrogen peroxide (H2O2) contributes to the atmospheres oxidizing capacity, which determinesthe lifetime of atmospheric trace species. Measured bidirectional summertime H2O2 fluxes fromthe snowpack at Summit, Greenland, in June 1996 reveal a daytime H2O2 release from thesurface snow reservoir and a partial redeposition at night. The observations also provide the firstdirect evidence of a strong net summertime H2O2 release from the snowpack, enhancing averageboundary layer H2O2 concentrations approximately sevenfold and the OH and HO2concentrations by 70% and 50%, respectively, relative to that estimated from photochemicalmodeling in the absence of the snowpack source. The total H2O2 release over a 12-day periodwas of the order of 5 * 10(13) molecules m(-2) s(-1) and compares well with observed concentrationchanges in the top snow layer. Photochemical and air-snow interaction modeling indicate thatthe net snowpack release is driven by temperature-induced uptake and release of H2O2 asdeposited snow, which is supersaturated with respect to ice-air partitioning, approachesequilibrium. The results show that the physical cycling of H2O2 and possibly other volatilespecies is a key to understanding snowpacks as complex physical-photochemical reactors and hasfar reaching implications for the interpretation of ice core records as well as for thephotochemistry in polar regions and in the vicinity of snowpacks in general. |
format |
Article in Journal/Newspaper |
author |
Hutterli, M. A. McConnell, J. R. Stewart, R. W. Jacobi, Hans-Werner Bales, R. C. |
spellingShingle |
Hutterli, M. A. McConnell, J. R. Stewart, R. W. Jacobi, Hans-Werner Bales, R. C. Impact of temperature-driven cycling of hydrogen peroxide (H2O2) between air and snow on the planetary boundary layer |
author_facet |
Hutterli, M. A. McConnell, J. R. Stewart, R. W. Jacobi, Hans-Werner Bales, R. C. |
author_sort |
Hutterli, M. A. |
title |
Impact of temperature-driven cycling of hydrogen peroxide (H2O2) between air and snow on the planetary boundary layer |
title_short |
Impact of temperature-driven cycling of hydrogen peroxide (H2O2) between air and snow on the planetary boundary layer |
title_full |
Impact of temperature-driven cycling of hydrogen peroxide (H2O2) between air and snow on the planetary boundary layer |
title_fullStr |
Impact of temperature-driven cycling of hydrogen peroxide (H2O2) between air and snow on the planetary boundary layer |
title_full_unstemmed |
Impact of temperature-driven cycling of hydrogen peroxide (H2O2) between air and snow on the planetary boundary layer |
title_sort |
impact of temperature-driven cycling of hydrogen peroxide (h2o2) between air and snow on the planetary boundary layer |
publishDate |
2001 |
url |
https://epic.awi.de/id/eprint/4468/ https://epic.awi.de/id/eprint/4468/1/Hut2001a.pdf https://hdl.handle.net/10013/epic.15043 https://hdl.handle.net/10013/epic.15043.d001 |
genre |
Greenland ice core |
genre_facet |
Greenland ice core |
op_source |
EPIC3Journal of Geophysical Research, 106, pp. 15395-15404 |
op_relation |
https://epic.awi.de/id/eprint/4468/1/Hut2001a.pdf https://hdl.handle.net/10013/epic.15043.d001 Hutterli, M. A. , McConnell, J. R. , Stewart, R. W. , Jacobi, H. W. and Bales, R. C. (2001) Impact of temperature-driven cycling of hydrogen peroxide (H2O2) between air and snow on the planetary boundary layer , Journal of Geophysical Research, 106 , pp. 15395-15404 . hdl:10013/epic.15043 |
_version_ |
1810447498276241408 |