Investigation of the atmosphere-snow transfer process for hydrogen peroxide
Of the three primary atmospheric oxidants, hydroxyl radical, ozone, and hydrogen peroxide (H₂O₂), only the latter is preserved in ice cores. To make quantitative use of the ice core archive, however, requires a detailed understanding of the physical processes that relate atmospheric concentrations t...
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ftunivarizona:oai:repository.arizona.edu:10150/282556 2023-05-15T16:29:39+02:00 Investigation of the atmosphere-snow transfer process for hydrogen peroxide McConnell, Joseph Robert, 1958- Bales, Roger C. 1997 http://hdl.handle.net/10150/282556 en_US eng The University of Arizona. http://hdl.handle.net/10150/282556 9814460 .b3774513x Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. Hydrology Physics Atmospheric Science Environmental Sciences text Dissertation-Reproduction (electronic) 1997 ftunivarizona 2020-06-14T08:07:35Z Of the three primary atmospheric oxidants, hydroxyl radical, ozone, and hydrogen peroxide (H₂O₂), only the latter is preserved in ice cores. To make quantitative use of the ice core archive, however, requires a detailed understanding of the physical processes that relate atmospheric concentrations to those in the snow, firn and thence ice. The transfer processes for H₂O₂ were investigated using field, laboratory, and computer modeling studies. Empirically and physically based numerical algorithms were developed to simulate the atmosphere-to-snow-to-firn transfer processes and these models coupled to a snow pack accumulation model. The models, tested using field data from Summit, Greenland and South Pole, indicate that H₂O₂ is reversibly deposited to the snow surface, with subsequent uptake and release controlled by advection of air containing H₂O₂ through the top meters of the snow pack and temperature-driven diffusion within individual snow grains. This physically based model was successfully used to invert year-round surface snow concentrations to an estimate of atmospheric H₂O₂ at South Pole. Field data and model results clarify the importance of accumulation timing and seasonality in determining the H₂O₂ record preserved in the snow pack. A statistical analysis of recent accumulation patterns at South Pole indicates that spatial variability in accumulation has a strong influence on chemical concentrations preserved in the snow pack. Thesis Greenland ice core South pole The University of Arizona: UA Campus Repository Greenland South Pole |
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Open Polar |
collection |
The University of Arizona: UA Campus Repository |
op_collection_id |
ftunivarizona |
language |
English |
topic |
Hydrology Physics Atmospheric Science Environmental Sciences |
spellingShingle |
Hydrology Physics Atmospheric Science Environmental Sciences McConnell, Joseph Robert, 1958- Investigation of the atmosphere-snow transfer process for hydrogen peroxide |
topic_facet |
Hydrology Physics Atmospheric Science Environmental Sciences |
description |
Of the three primary atmospheric oxidants, hydroxyl radical, ozone, and hydrogen peroxide (H₂O₂), only the latter is preserved in ice cores. To make quantitative use of the ice core archive, however, requires a detailed understanding of the physical processes that relate atmospheric concentrations to those in the snow, firn and thence ice. The transfer processes for H₂O₂ were investigated using field, laboratory, and computer modeling studies. Empirically and physically based numerical algorithms were developed to simulate the atmosphere-to-snow-to-firn transfer processes and these models coupled to a snow pack accumulation model. The models, tested using field data from Summit, Greenland and South Pole, indicate that H₂O₂ is reversibly deposited to the snow surface, with subsequent uptake and release controlled by advection of air containing H₂O₂ through the top meters of the snow pack and temperature-driven diffusion within individual snow grains. This physically based model was successfully used to invert year-round surface snow concentrations to an estimate of atmospheric H₂O₂ at South Pole. Field data and model results clarify the importance of accumulation timing and seasonality in determining the H₂O₂ record preserved in the snow pack. A statistical analysis of recent accumulation patterns at South Pole indicates that spatial variability in accumulation has a strong influence on chemical concentrations preserved in the snow pack. |
author2 |
Bales, Roger C. |
format |
Thesis |
author |
McConnell, Joseph Robert, 1958- |
author_facet |
McConnell, Joseph Robert, 1958- |
author_sort |
McConnell, Joseph Robert, 1958- |
title |
Investigation of the atmosphere-snow transfer process for hydrogen peroxide |
title_short |
Investigation of the atmosphere-snow transfer process for hydrogen peroxide |
title_full |
Investigation of the atmosphere-snow transfer process for hydrogen peroxide |
title_fullStr |
Investigation of the atmosphere-snow transfer process for hydrogen peroxide |
title_full_unstemmed |
Investigation of the atmosphere-snow transfer process for hydrogen peroxide |
title_sort |
investigation of the atmosphere-snow transfer process for hydrogen peroxide |
publisher |
The University of Arizona. |
publishDate |
1997 |
url |
http://hdl.handle.net/10150/282556 |
geographic |
Greenland South Pole |
geographic_facet |
Greenland South Pole |
genre |
Greenland ice core South pole |
genre_facet |
Greenland ice core South pole |
op_relation |
http://hdl.handle.net/10150/282556 9814460 .b3774513x |
op_rights |
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. |
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1766019359251103744 |