Biogenic Halocarbons in Polar Sea Ice
Sea ice is to date a rather poorly investigated part of the cycling of volatile halogenated organic compounds, halocarbons. These compounds are natural sources of reactive iodine and bromine to the atmosphere, and are produced in the marine environment. The aim of this study was to determine the rol...
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ftunivgoeteborg:oai:gupea.ub.gu.se:2077/35507 2023-10-29T02:31:37+01:00 Biogenic Halocarbons in Polar Sea Ice Granfors, Anna 2014-04-28 application/pdf http://hdl.handle.net/2077/35507 eng eng I. Granfors A., Andersson M., Cherici M., Fransson A., Gårdfeldt K., Torstensson A., Wulff A., Abrahamsson K. Biogenic halocarbons in young Arctic sea ice and frost flowers, Marine Chemistry, 2013;155, 124-134. ::doi::10.1016/j.marchem.2013.06.002 II. Granfors A., Karlsson A., Mattsson E., Smith W. O., Abrahamsson K. Contribution of sea ice in the Southern Ocean to the cycling of volatile halogenated organic compounds, Geophysical Research Letters, 2013; 40, 1-6. ::doi::10.1002/grl.50777 III. Abrahamsson K., Granfors A., Ahnoff M. Seasonal sea ice -a significant source of organic bromine during polar night. Manuscript IV. Granfors A., Ahnoff M., Mills M.M., Abrahamsson K. Seasonal study of organic iodine in Antarctic sea ice. Manuscript 978-91-628-9006-3 http://hdl.handle.net/2077/35507 Volatile biogenic halocarbons Sea ice Antarctica ice-air flux gases Text Doctoral thesis Doctor of Philosophy 2014 ftunivgoeteborg 2023-10-04T21:23:34Z Sea ice is to date a rather poorly investigated part of the cycling of volatile halogenated organic compounds, halocarbons. These compounds are natural sources of reactive iodine and bromine to the atmosphere, and are produced in the marine environment. The aim of this study was to determine the role of sea ice in terms of production and release of halocarbons to the atmosphere. Iodinated and brominated halocarbons were measured in polar sea ice as well as in snow, air, and seawater under the ice. Multiple samples were collected from the same location in order to cover variability. Studies were performed both in winter and summer, and seasonal variations were observed. Sea ice acted as a source of halocarbons both in winter and in summer. Biotic production was observed during summer, and depth distributions of halocarbons in the ice were related to ice algal biomass. Unexpectedly high concentrations of halocarbons were found at the surface of Antarctic winter sea ice. For bromoform (CHBr3) the concentration range was 0.2 - 20 nM in the top 10 cm of the ice. High concentrations were also found in the snow closest to the snow-ice interface. Our results suggest that an abiotic formation occurs in seasonal sea ice during polar night. This may lead to a winter accumulation of halocarbons in the marine boundary layer and enhance tropospheric ozone depletion in the polar spring. Doctoral or Postdoctoral Thesis Antarc* Antarctic Antarctica Arctic polar night Sea ice University of Gothenburg: GUPEA (Gothenburg University Publications Electronic Archive) |
institution |
Open Polar |
collection |
University of Gothenburg: GUPEA (Gothenburg University Publications Electronic Archive) |
op_collection_id |
ftunivgoeteborg |
language |
English |
topic |
Volatile biogenic halocarbons Sea ice Antarctica ice-air flux gases |
spellingShingle |
Volatile biogenic halocarbons Sea ice Antarctica ice-air flux gases Granfors, Anna Biogenic Halocarbons in Polar Sea Ice |
topic_facet |
Volatile biogenic halocarbons Sea ice Antarctica ice-air flux gases |
description |
Sea ice is to date a rather poorly investigated part of the cycling of volatile halogenated organic compounds, halocarbons. These compounds are natural sources of reactive iodine and bromine to the atmosphere, and are produced in the marine environment. The aim of this study was to determine the role of sea ice in terms of production and release of halocarbons to the atmosphere. Iodinated and brominated halocarbons were measured in polar sea ice as well as in snow, air, and seawater under the ice. Multiple samples were collected from the same location in order to cover variability. Studies were performed both in winter and summer, and seasonal variations were observed. Sea ice acted as a source of halocarbons both in winter and in summer. Biotic production was observed during summer, and depth distributions of halocarbons in the ice were related to ice algal biomass. Unexpectedly high concentrations of halocarbons were found at the surface of Antarctic winter sea ice. For bromoform (CHBr3) the concentration range was 0.2 - 20 nM in the top 10 cm of the ice. High concentrations were also found in the snow closest to the snow-ice interface. Our results suggest that an abiotic formation occurs in seasonal sea ice during polar night. This may lead to a winter accumulation of halocarbons in the marine boundary layer and enhance tropospheric ozone depletion in the polar spring. |
format |
Doctoral or Postdoctoral Thesis |
author |
Granfors, Anna |
author_facet |
Granfors, Anna |
author_sort |
Granfors, Anna |
title |
Biogenic Halocarbons in Polar Sea Ice |
title_short |
Biogenic Halocarbons in Polar Sea Ice |
title_full |
Biogenic Halocarbons in Polar Sea Ice |
title_fullStr |
Biogenic Halocarbons in Polar Sea Ice |
title_full_unstemmed |
Biogenic Halocarbons in Polar Sea Ice |
title_sort |
biogenic halocarbons in polar sea ice |
publishDate |
2014 |
url |
http://hdl.handle.net/2077/35507 |
genre |
Antarc* Antarctic Antarctica Arctic polar night Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Arctic polar night Sea ice |
op_relation |
I. Granfors A., Andersson M., Cherici M., Fransson A., Gårdfeldt K., Torstensson A., Wulff A., Abrahamsson K. Biogenic halocarbons in young Arctic sea ice and frost flowers, Marine Chemistry, 2013;155, 124-134. ::doi::10.1016/j.marchem.2013.06.002 II. Granfors A., Karlsson A., Mattsson E., Smith W. O., Abrahamsson K. Contribution of sea ice in the Southern Ocean to the cycling of volatile halogenated organic compounds, Geophysical Research Letters, 2013; 40, 1-6. ::doi::10.1002/grl.50777 III. Abrahamsson K., Granfors A., Ahnoff M. Seasonal sea ice -a significant source of organic bromine during polar night. Manuscript IV. Granfors A., Ahnoff M., Mills M.M., Abrahamsson K. Seasonal study of organic iodine in Antarctic sea ice. Manuscript 978-91-628-9006-3 http://hdl.handle.net/2077/35507 |
_version_ |
1781052276535721984 |