Observation of halogen species in the Amundsen Gulf, Arctic, by active long-path differential optical absorption spectroscopy
In the polar tropospheric boundary layer, reactive halogen species (RHS) are responsible for ozone depletion as well as the oxidation of elemental mercury and dimethyl sulphide. After polar sunrise, air masses enriched in reactive bromine cover areas of several million square kilometers. Still, the...
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ftpubmed:oai:pubmedcentral.nih.gov:2872394 2023-05-15T13:22:52+02:00 Observation of halogen species in the Amundsen Gulf, Arctic, by active long-path differential optical absorption spectroscopy Pöhler, Denis Vogel, Leif Frieß, Udo Platt, Ulrich 2010-04-13 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2872394 http://www.ncbi.nlm.nih.gov/pubmed/20160121 https://doi.org/10.1073/pnas.0912231107 en eng National Academy of Sciences http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2872394 http://www.ncbi.nlm.nih.gov/pubmed/20160121 http://dx.doi.org/10.1073/pnas.0912231107 Atmospheric Chemistry Special Feature Text 2010 ftpubmed https://doi.org/10.1073/pnas.0912231107 2013-09-03T00:36:06Z In the polar tropospheric boundary layer, reactive halogen species (RHS) are responsible for ozone depletion as well as the oxidation of elemental mercury and dimethyl sulphide. After polar sunrise, air masses enriched in reactive bromine cover areas of several million square kilometers. Still, the source and release mechanisms of halogens are not completely understood. We report measurements of halogen oxides performed in the Amundsen Gulf, Arctic, during spring 2008. Active long-path differential optical absorption spectroscopy (LP-DOAS) measurements were set up offshore, several kilometers from the coast, directly on the sea ice, which was never done before. High bromine oxide concentrations were detected frequently during sunlight hours with a characteristic daily cycle showing morning and evening maxima and a minimum at noon. The, so far, highest observed average mixing ratio in the polar boundary layer of 41 pmol/mol (equal to pptv) was detected. Only short sea ice contact is required to release high amounts of bromine. An observed linear decrease of maximum bromine oxide levels with ambient temperature during sunlight, between -24 °C and -15 °C, provides indications on the conditions required for the emission of RHS. In addition, the data indicate the presence of reactive chlorine in the Arctic boundary layer. In contrast to Antarctica, iodine oxide was not detected above a detection limit of 0.3 pmol/mol. Text Amundsen Gulf Antarc* Antarctica Arctic Sea ice PubMed Central (PMC) Arctic Proceedings of the National Academy of Sciences 107 15 6582 6587 |
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Atmospheric Chemistry Special Feature |
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Atmospheric Chemistry Special Feature Pöhler, Denis Vogel, Leif Frieß, Udo Platt, Ulrich Observation of halogen species in the Amundsen Gulf, Arctic, by active long-path differential optical absorption spectroscopy |
topic_facet |
Atmospheric Chemistry Special Feature |
description |
In the polar tropospheric boundary layer, reactive halogen species (RHS) are responsible for ozone depletion as well as the oxidation of elemental mercury and dimethyl sulphide. After polar sunrise, air masses enriched in reactive bromine cover areas of several million square kilometers. Still, the source and release mechanisms of halogens are not completely understood. We report measurements of halogen oxides performed in the Amundsen Gulf, Arctic, during spring 2008. Active long-path differential optical absorption spectroscopy (LP-DOAS) measurements were set up offshore, several kilometers from the coast, directly on the sea ice, which was never done before. High bromine oxide concentrations were detected frequently during sunlight hours with a characteristic daily cycle showing morning and evening maxima and a minimum at noon. The, so far, highest observed average mixing ratio in the polar boundary layer of 41 pmol/mol (equal to pptv) was detected. Only short sea ice contact is required to release high amounts of bromine. An observed linear decrease of maximum bromine oxide levels with ambient temperature during sunlight, between -24 °C and -15 °C, provides indications on the conditions required for the emission of RHS. In addition, the data indicate the presence of reactive chlorine in the Arctic boundary layer. In contrast to Antarctica, iodine oxide was not detected above a detection limit of 0.3 pmol/mol. |
format |
Text |
author |
Pöhler, Denis Vogel, Leif Frieß, Udo Platt, Ulrich |
author_facet |
Pöhler, Denis Vogel, Leif Frieß, Udo Platt, Ulrich |
author_sort |
Pöhler, Denis |
title |
Observation of halogen species in the Amundsen Gulf, Arctic, by active long-path differential optical absorption spectroscopy |
title_short |
Observation of halogen species in the Amundsen Gulf, Arctic, by active long-path differential optical absorption spectroscopy |
title_full |
Observation of halogen species in the Amundsen Gulf, Arctic, by active long-path differential optical absorption spectroscopy |
title_fullStr |
Observation of halogen species in the Amundsen Gulf, Arctic, by active long-path differential optical absorption spectroscopy |
title_full_unstemmed |
Observation of halogen species in the Amundsen Gulf, Arctic, by active long-path differential optical absorption spectroscopy |
title_sort |
observation of halogen species in the amundsen gulf, arctic, by active long-path differential optical absorption spectroscopy |
publisher |
National Academy of Sciences |
publishDate |
2010 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2872394 http://www.ncbi.nlm.nih.gov/pubmed/20160121 https://doi.org/10.1073/pnas.0912231107 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Amundsen Gulf Antarc* Antarctica Arctic Sea ice |
genre_facet |
Amundsen Gulf Antarc* Antarctica Arctic Sea ice |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2872394 http://www.ncbi.nlm.nih.gov/pubmed/20160121 http://dx.doi.org/10.1073/pnas.0912231107 |
op_doi |
https://doi.org/10.1073/pnas.0912231107 |
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Proceedings of the National Academy of Sciences |
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107 |
container_issue |
15 |
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6582 |
op_container_end_page |
6587 |
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1766367549175365632 |