Halogen Oxide Studies in the Boundary Layer by Multi Axis Differential Optical Absorption Spectroscopy and Active Longpath-DOAS
The importance of reactive halogen species (particularly halogen oxides) in the troposphere is due to their strong effect on tropospheric ozone levels, which has been first discovered during surface ozone depletion episodes in the polar boundary layer after polar sunrise (bromine oxide, BrO). Haloge...
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ftunivheidelb:oai:archiv.ub.uni-heidelberg.de:1940 2023-11-05T03:38:46+01:00 Halogen Oxide Studies in the Boundary Layer by Multi Axis Differential Optical Absorption Spectroscopy and Active Longpath-DOAS Hönninger, Gerd 2002 application/pdf https://archiv.ub.uni-heidelberg.de/volltextserver/1940/ https://archiv.ub.uni-heidelberg.de/volltextserver/1940/1/Diss_Hoenninger.pdf https://doi.org/10.11588/heidok.00001940 https://nbn-resolving.org/urn:nbn:de:bsz:16-opus-19407 eng eng https://archiv.ub.uni-heidelberg.de/volltextserver/1940/1/Diss_Hoenninger.pdf doi:10.11588/heidok.00001940 urn:nbn:de:bsz:16-opus-19407 Hönninger, Gerd (2002) Halogen Oxide Studies in the Boundary Layer by Multi Axis Differential Optical Absorption Spectroscopy and Active Longpath-DOAS. [Dissertation] info:eu-repo/semantics/openAccess http://archiv.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html 530 530 Physics Dissertation info:eu-repo/semantics/doctoralThesis NonPeerReviewed 2002 ftunivheidelb https://doi.org/10.11588/heidok.00001940 2023-10-10T12:04:33Z The importance of reactive halogen species (particularly halogen oxides) in the troposphere is due to their strong effect on tropospheric ozone levels, which has been first discovered during surface ozone depletion episodes in the polar boundary layer after polar sunrise (bromine oxide, BrO). Halogen oxides have also been reported from mid-latitude coastal sites (iodine oxide, IO and iodine dioxide, OIO) and from the Dead Sea basin (BrO). Results from the field studies performed in framework of this thesis at Arctic and mid- latitude locations are presented here. BrO and its vertical profile near the ground has been observed during surface ozone destruction in the Canadian high and low Arctic. First simultaneous measurements of BrO and IO in the Arctic boundary layer were performed by ground-based MAX-DOAS, which was developed within this work. The measurements at the Hudson Bay represent the southernmost and first direct observations of Arctic surface ozone losses due to BrO and allowed for the first time to study the day and nighttime chemistry of BrO at high time resolution. Molecular bromine was inferred to be a major reservoir compound during the night, initiating sunrise ozone destruction upon photolysis. The first simultaneous measurements of BrO and gas phase elemental mercury at high time resolution in the Canadian Arctic support the proposed key role of BrO as oxidant for mercury in the gas phase during polar springtime. Further measurements of halogen oxides at clean and moderately polluted mid-latitude coastal sites yielded new field data on halogen oxide concentrations and upper limits at different pollution levels. Doctoral or Postdoctoral Thesis Arctic Hudson Bay Heidelberg University: HeiDok |
institution |
Open Polar |
collection |
Heidelberg University: HeiDok |
op_collection_id |
ftunivheidelb |
language |
English |
topic |
530 530 Physics |
spellingShingle |
530 530 Physics Hönninger, Gerd Halogen Oxide Studies in the Boundary Layer by Multi Axis Differential Optical Absorption Spectroscopy and Active Longpath-DOAS |
topic_facet |
530 530 Physics |
description |
The importance of reactive halogen species (particularly halogen oxides) in the troposphere is due to their strong effect on tropospheric ozone levels, which has been first discovered during surface ozone depletion episodes in the polar boundary layer after polar sunrise (bromine oxide, BrO). Halogen oxides have also been reported from mid-latitude coastal sites (iodine oxide, IO and iodine dioxide, OIO) and from the Dead Sea basin (BrO). Results from the field studies performed in framework of this thesis at Arctic and mid- latitude locations are presented here. BrO and its vertical profile near the ground has been observed during surface ozone destruction in the Canadian high and low Arctic. First simultaneous measurements of BrO and IO in the Arctic boundary layer were performed by ground-based MAX-DOAS, which was developed within this work. The measurements at the Hudson Bay represent the southernmost and first direct observations of Arctic surface ozone losses due to BrO and allowed for the first time to study the day and nighttime chemistry of BrO at high time resolution. Molecular bromine was inferred to be a major reservoir compound during the night, initiating sunrise ozone destruction upon photolysis. The first simultaneous measurements of BrO and gas phase elemental mercury at high time resolution in the Canadian Arctic support the proposed key role of BrO as oxidant for mercury in the gas phase during polar springtime. Further measurements of halogen oxides at clean and moderately polluted mid-latitude coastal sites yielded new field data on halogen oxide concentrations and upper limits at different pollution levels. |
format |
Doctoral or Postdoctoral Thesis |
author |
Hönninger, Gerd |
author_facet |
Hönninger, Gerd |
author_sort |
Hönninger, Gerd |
title |
Halogen Oxide Studies in the Boundary Layer by Multi Axis Differential Optical Absorption Spectroscopy and Active Longpath-DOAS |
title_short |
Halogen Oxide Studies in the Boundary Layer by Multi Axis Differential Optical Absorption Spectroscopy and Active Longpath-DOAS |
title_full |
Halogen Oxide Studies in the Boundary Layer by Multi Axis Differential Optical Absorption Spectroscopy and Active Longpath-DOAS |
title_fullStr |
Halogen Oxide Studies in the Boundary Layer by Multi Axis Differential Optical Absorption Spectroscopy and Active Longpath-DOAS |
title_full_unstemmed |
Halogen Oxide Studies in the Boundary Layer by Multi Axis Differential Optical Absorption Spectroscopy and Active Longpath-DOAS |
title_sort |
halogen oxide studies in the boundary layer by multi axis differential optical absorption spectroscopy and active longpath-doas |
publishDate |
2002 |
url |
https://archiv.ub.uni-heidelberg.de/volltextserver/1940/ https://archiv.ub.uni-heidelberg.de/volltextserver/1940/1/Diss_Hoenninger.pdf https://doi.org/10.11588/heidok.00001940 https://nbn-resolving.org/urn:nbn:de:bsz:16-opus-19407 |
genre |
Arctic Hudson Bay |
genre_facet |
Arctic Hudson Bay |
op_relation |
https://archiv.ub.uni-heidelberg.de/volltextserver/1940/1/Diss_Hoenninger.pdf doi:10.11588/heidok.00001940 urn:nbn:de:bsz:16-opus-19407 Hönninger, Gerd (2002) Halogen Oxide Studies in the Boundary Layer by Multi Axis Differential Optical Absorption Spectroscopy and Active Longpath-DOAS. [Dissertation] |
op_rights |
info:eu-repo/semantics/openAccess http://archiv.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html |
op_doi |
https://doi.org/10.11588/heidok.00001940 |
_version_ |
1781694521151586304 |