BrO measurements over the Eastern North-Atlantic
The aim of the work presented here was to detect BrO in the marine boundary layer over the Eastern North-Atlantic by Multi AXis-Differential Optical Absorption Spectroscopy (MAX-DOAS) of scattered sunlight. With this technique, information about the concentration and the vertical profile of trace ga...
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/83528 2023-05-15T17:30:37+02:00 BrO measurements over the Eastern North-Atlantic Martin, Maria Pöhler, Denis Seitz, Katja Sinreich, Roman Platt, Ulrich 2009 application/application/pdf https://hdl.handle.net/20.500.11850/83528 https://doi.org/10.3929/ethz-b-000083528 en eng Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-9-9545-2009 info:eu-repo/semantics/altIdentifier/wos/000273060200012 http://hdl.handle.net/20.500.11850/83528 doi:10.3929/ethz-b-000083528 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/3.0/ Creative Commons Attribution 3.0 Unported CC-BY Atmospheric Chemistry and Physics, 9 (24) info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2009 ftethz https://doi.org/20.500.11850/83528 https://doi.org/10.3929/ethz-b-000083528 https://doi.org/10.5194/acp-9-9545-2009 2023-02-13T00:45:43Z The aim of the work presented here was to detect BrO in the marine boundary layer over the Eastern North-Atlantic by Multi AXis-Differential Optical Absorption Spectroscopy (MAX-DOAS) of scattered sunlight. With this technique, information about the concentration and the vertical profile of trace gases in the atmosphere can be gained. BrO can be formed in the marine atmosphere by degradation of biogenic organohalogens or by oxidation of bromide in sea salt aerosol. BrO influences the chemistry in marine air in many ways, e.g. since it catalytically destroys ozone, changes the NO2/NO-ratio as well as the OH/HO2-ratio and oxidises DMS. However, the abundance and the significance of BrO in the marine atmosphere is not yet fully understood. We report on data collected during a ship cruise, which took place along the West African Coast in February 2007, within the framework of the Surface Ocean PRocesses in the ANthropocene project (SOPRAN). Tropospheric BrO could be detected during this cruise at peak mixing ratios of (10.2±3.7) ppt at an assumed layer height of 1 km on 18 February 2007. Furthermore, it was found that the mean BrO concentrations increased when cruising close to the African Coast suggesting that at least part of the BrO might have originated from there. ISSN:1680-7375 ISSN:1680-7367 Article in Journal/Newspaper North Atlantic ETH Zürich Research Collection |
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Open Polar |
collection |
ETH Zürich Research Collection |
op_collection_id |
ftethz |
language |
English |
description |
The aim of the work presented here was to detect BrO in the marine boundary layer over the Eastern North-Atlantic by Multi AXis-Differential Optical Absorption Spectroscopy (MAX-DOAS) of scattered sunlight. With this technique, information about the concentration and the vertical profile of trace gases in the atmosphere can be gained. BrO can be formed in the marine atmosphere by degradation of biogenic organohalogens or by oxidation of bromide in sea salt aerosol. BrO influences the chemistry in marine air in many ways, e.g. since it catalytically destroys ozone, changes the NO2/NO-ratio as well as the OH/HO2-ratio and oxidises DMS. However, the abundance and the significance of BrO in the marine atmosphere is not yet fully understood. We report on data collected during a ship cruise, which took place along the West African Coast in February 2007, within the framework of the Surface Ocean PRocesses in the ANthropocene project (SOPRAN). Tropospheric BrO could be detected during this cruise at peak mixing ratios of (10.2±3.7) ppt at an assumed layer height of 1 km on 18 February 2007. Furthermore, it was found that the mean BrO concentrations increased when cruising close to the African Coast suggesting that at least part of the BrO might have originated from there. ISSN:1680-7375 ISSN:1680-7367 |
format |
Article in Journal/Newspaper |
author |
Martin, Maria Pöhler, Denis Seitz, Katja Sinreich, Roman Platt, Ulrich |
spellingShingle |
Martin, Maria Pöhler, Denis Seitz, Katja Sinreich, Roman Platt, Ulrich BrO measurements over the Eastern North-Atlantic |
author_facet |
Martin, Maria Pöhler, Denis Seitz, Katja Sinreich, Roman Platt, Ulrich |
author_sort |
Martin, Maria |
title |
BrO measurements over the Eastern North-Atlantic |
title_short |
BrO measurements over the Eastern North-Atlantic |
title_full |
BrO measurements over the Eastern North-Atlantic |
title_fullStr |
BrO measurements over the Eastern North-Atlantic |
title_full_unstemmed |
BrO measurements over the Eastern North-Atlantic |
title_sort |
bro measurements over the eastern north-atlantic |
publisher |
Copernicus |
publishDate |
2009 |
url |
https://hdl.handle.net/20.500.11850/83528 https://doi.org/10.3929/ethz-b-000083528 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Atmospheric Chemistry and Physics, 9 (24) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-9-9545-2009 info:eu-repo/semantics/altIdentifier/wos/000273060200012 http://hdl.handle.net/20.500.11850/83528 doi:10.3929/ethz-b-000083528 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/3.0/ Creative Commons Attribution 3.0 Unported |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/20.500.11850/83528 https://doi.org/10.3929/ethz-b-000083528 https://doi.org/10.5194/acp-9-9545-2009 |
_version_ |
1766127476857110528 |