DMS and MSA measurements in the Antarctic Boundary Layer: impact of BrO on MSA production
In situ measurements of dimethyl sulphide (DMS) and methane sulphonic acid (MSA) were made at Halley Station, Antarctica (75 degrees 35' S, 26 degrees 19' W) during February 2004-February 2005 as part of the CHABLIS (Chemistry of the Antarctic Boundary Layer and the Interface with Snow) pr...
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Copernicus Publications
2008
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ftnerc:oai:nora.nerc.ac.uk:11596 2023-05-15T13:45:10+02:00 DMS and MSA measurements in the Antarctic Boundary Layer: impact of BrO on MSA production Read, K.A. Lewis, A.C. Bauguitte, Stephane Rankin, Andrew M. Salmon, R.A. Wolff, Eric W. Saiz-Lopez, A. Bloss, W.J. Heard, D.E. Lee, J.D. Plane, J.M.C. 2008 text http://nora.nerc.ac.uk/id/eprint/11596/ https://nora.nerc.ac.uk/id/eprint/11596/1/acp-8-2985-2008.pdf http://www.atmos-chem-phys.net/8/2985/2008/acp-8-2985-2008.pdf en eng Copernicus Publications https://nora.nerc.ac.uk/id/eprint/11596/1/acp-8-2985-2008.pdf Read, K.A.; Lewis, A.C.; Bauguitte, Stephane; Rankin, Andrew M.; Salmon, R.A.; Wolff, Eric W.; Saiz-Lopez, A.; Bloss, W.J.; Heard, D.E.; Lee, J.D.; Plane, J.M.C. 2008 DMS and MSA measurements in the Antarctic Boundary Layer: impact of BrO on MSA production. Atmospheric Chemistry and Physics, 8 (11). 2985-2997. https://doi.org/10.5194/acp-8-2985-2008 <https://doi.org/10.5194/acp-8-2985-2008> Atmospheric Sciences Chemistry Publication - Article PeerReviewed 2008 ftnerc https://doi.org/10.5194/acp-8-2985-2008 2023-02-04T19:27:25Z In situ measurements of dimethyl sulphide (DMS) and methane sulphonic acid (MSA) were made at Halley Station, Antarctica (75 degrees 35' S, 26 degrees 19' W) during February 2004-February 2005 as part of the CHABLIS (Chemistry of the Antarctic Boundary Layer and the Interface with Snow) project. DMS was present in the atmosphere at Halley all year (average 38.1+/-43 pptV) with a maximum monthly average value of 113.6+/-52 pptV in February 2004 coinciding temporally with a minimum in sea extent. Whilst seasonal variability and interannual variability can be attributed to a number of factors, short term variability appeared strongly dependent on air mass origin and trajectory pressure height. The MSA and derived non-sea salt sulphate (nss-SO42-) measurements showed no correlation with those of DMS (regression R-2=0.039, and R-2=0.001 respectively) in-line with the complexity of DMS fluxes, alternative oxidation routes, transport of air masses and variable spatial coverage of both sea-ice and phytoplankton. MSA was generally low throughout the year, with an annual average of 42 ng m(-3) (9.8+/-13.2 pptV), however MSA: nss-SO42- ratios were high implying a dominance of the addition oxidation route for DMS. Including BrO measurements into MSA production calculations demonstrated the significance of BrO on DMS oxidation within this region of the atmosphere in austral summer. Assuming an 80% yield of DMSO from the reaction of DMS+BrO, an atmospheric concentration of BrO equal to 3 pptV increased the calculated MSA production from DMS by a factor of 9 above that obtained when considering only reaction with the hydroxyl radical. These findings have significant atmospheric implications, but may also impact on the interpretation of ice cores which previously relied on the understanding of MSA and nss-SO42- chemistry to provide information on environmental conditions such as sea ice extent and the origins of sulphur within the ice. Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice Natural Environment Research Council: NERC Open Research Archive Antarctic Austral Halley Station ENVELOPE(-26.541,-26.541,-75.581,-75.581) The Antarctic Atmospheric Chemistry and Physics 8 11 2985 2997 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Atmospheric Sciences Chemistry |
spellingShingle |
Atmospheric Sciences Chemistry Read, K.A. Lewis, A.C. Bauguitte, Stephane Rankin, Andrew M. Salmon, R.A. Wolff, Eric W. Saiz-Lopez, A. Bloss, W.J. Heard, D.E. Lee, J.D. Plane, J.M.C. DMS and MSA measurements in the Antarctic Boundary Layer: impact of BrO on MSA production |
topic_facet |
Atmospheric Sciences Chemistry |
description |
In situ measurements of dimethyl sulphide (DMS) and methane sulphonic acid (MSA) were made at Halley Station, Antarctica (75 degrees 35' S, 26 degrees 19' W) during February 2004-February 2005 as part of the CHABLIS (Chemistry of the Antarctic Boundary Layer and the Interface with Snow) project. DMS was present in the atmosphere at Halley all year (average 38.1+/-43 pptV) with a maximum monthly average value of 113.6+/-52 pptV in February 2004 coinciding temporally with a minimum in sea extent. Whilst seasonal variability and interannual variability can be attributed to a number of factors, short term variability appeared strongly dependent on air mass origin and trajectory pressure height. The MSA and derived non-sea salt sulphate (nss-SO42-) measurements showed no correlation with those of DMS (regression R-2=0.039, and R-2=0.001 respectively) in-line with the complexity of DMS fluxes, alternative oxidation routes, transport of air masses and variable spatial coverage of both sea-ice and phytoplankton. MSA was generally low throughout the year, with an annual average of 42 ng m(-3) (9.8+/-13.2 pptV), however MSA: nss-SO42- ratios were high implying a dominance of the addition oxidation route for DMS. Including BrO measurements into MSA production calculations demonstrated the significance of BrO on DMS oxidation within this region of the atmosphere in austral summer. Assuming an 80% yield of DMSO from the reaction of DMS+BrO, an atmospheric concentration of BrO equal to 3 pptV increased the calculated MSA production from DMS by a factor of 9 above that obtained when considering only reaction with the hydroxyl radical. These findings have significant atmospheric implications, but may also impact on the interpretation of ice cores which previously relied on the understanding of MSA and nss-SO42- chemistry to provide information on environmental conditions such as sea ice extent and the origins of sulphur within the ice. |
format |
Article in Journal/Newspaper |
author |
Read, K.A. Lewis, A.C. Bauguitte, Stephane Rankin, Andrew M. Salmon, R.A. Wolff, Eric W. Saiz-Lopez, A. Bloss, W.J. Heard, D.E. Lee, J.D. Plane, J.M.C. |
author_facet |
Read, K.A. Lewis, A.C. Bauguitte, Stephane Rankin, Andrew M. Salmon, R.A. Wolff, Eric W. Saiz-Lopez, A. Bloss, W.J. Heard, D.E. Lee, J.D. Plane, J.M.C. |
author_sort |
Read, K.A. |
title |
DMS and MSA measurements in the Antarctic Boundary Layer: impact of BrO on MSA production |
title_short |
DMS and MSA measurements in the Antarctic Boundary Layer: impact of BrO on MSA production |
title_full |
DMS and MSA measurements in the Antarctic Boundary Layer: impact of BrO on MSA production |
title_fullStr |
DMS and MSA measurements in the Antarctic Boundary Layer: impact of BrO on MSA production |
title_full_unstemmed |
DMS and MSA measurements in the Antarctic Boundary Layer: impact of BrO on MSA production |
title_sort |
dms and msa measurements in the antarctic boundary layer: impact of bro on msa production |
publisher |
Copernicus Publications |
publishDate |
2008 |
url |
http://nora.nerc.ac.uk/id/eprint/11596/ https://nora.nerc.ac.uk/id/eprint/11596/1/acp-8-2985-2008.pdf http://www.atmos-chem-phys.net/8/2985/2008/acp-8-2985-2008.pdf |
long_lat |
ENVELOPE(-26.541,-26.541,-75.581,-75.581) |
geographic |
Antarctic Austral Halley Station The Antarctic |
geographic_facet |
Antarctic Austral Halley Station The Antarctic |
genre |
Antarc* Antarctic Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Sea ice |
op_relation |
https://nora.nerc.ac.uk/id/eprint/11596/1/acp-8-2985-2008.pdf Read, K.A.; Lewis, A.C.; Bauguitte, Stephane; Rankin, Andrew M.; Salmon, R.A.; Wolff, Eric W.; Saiz-Lopez, A.; Bloss, W.J.; Heard, D.E.; Lee, J.D.; Plane, J.M.C. 2008 DMS and MSA measurements in the Antarctic Boundary Layer: impact of BrO on MSA production. Atmospheric Chemistry and Physics, 8 (11). 2985-2997. https://doi.org/10.5194/acp-8-2985-2008 <https://doi.org/10.5194/acp-8-2985-2008> |
op_doi |
https://doi.org/10.5194/acp-8-2985-2008 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
8 |
container_issue |
11 |
container_start_page |
2985 |
op_container_end_page |
2997 |
_version_ |
1766214657491599360 |