Dimethyl sulfide in the summertime Arctic atmosphere: measurements and source sensitivity simulations
Dimethyl sulfide (DMS) plays a major role in the global sulfur cycle. In addition, its atmospheric oxidation products contribute to the formation and growth of atmospheric aerosol particles, thereby influencing cloud condensation nuclei (CCN) populations and thus cloud formation. The pristine summer...
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ftdoajarticles:oai:doaj.org/article:a7fdc923fe8c456ba87ab83e8790079e 2023-05-15T14:56:56+02:00 Dimethyl sulfide in the summertime Arctic atmosphere: measurements and source sensitivity simulations E. L. Mungall B. Croft M. Lizotte J. L. Thomas J. G. Murphy M. Levasseur R. V. Martin J. J. B. Wentzell J. Liggio J. P. D. Abbatt 2016-06-01T00:00:00Z https://doi.org/10.5194/acp-16-6665-2016 https://doaj.org/article/a7fdc923fe8c456ba87ab83e8790079e EN eng Copernicus Publications https://www.atmos-chem-phys.net/16/6665/2016/acp-16-6665-2016.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-16-6665-2016 1680-7316 1680-7324 https://doaj.org/article/a7fdc923fe8c456ba87ab83e8790079e Atmospheric Chemistry and Physics, Vol 16, Pp 6665-6680 (2016) Physics QC1-999 Chemistry QD1-999 article 2016 ftdoajarticles https://doi.org/10.5194/acp-16-6665-2016 2022-12-31T14:45:22Z Dimethyl sulfide (DMS) plays a major role in the global sulfur cycle. In addition, its atmospheric oxidation products contribute to the formation and growth of atmospheric aerosol particles, thereby influencing cloud condensation nuclei (CCN) populations and thus cloud formation. The pristine summertime Arctic atmosphere is strongly influenced by DMS. However, atmospheric DMS mixing ratios have only rarely been measured in the summertime Arctic. During July–August, 2014, we conducted the first high time resolution (10 Hz) DMS mixing ratio measurements for the eastern Canadian Archipelago and Baffin Bay as one component of the Network on Climate and Aerosols: Addressing Key Uncertainties in Remote Canadian Environments (NETCARE). DMS mixing ratios ranged from below the detection limit of 4 to 1155 pptv (median 186 pptv) during the 21-day shipboard campaign. A transfer velocity parameterization from the literature coupled with coincident atmospheric and seawater DMS measurements yielded air–sea DMS flux estimates ranging from 0.02 to 12 µmol m −2 d −1 . Air-mass trajectory analysis using FLEXPART-WRF and sensitivity simulations with the GEOS-Chem chemical transport model indicated that local sources (Lancaster Sound and Baffin Bay) were the dominant contributors to the DMS measured along the 21-day ship track, with episodic transport from the Hudson Bay System. After adjusting GEOS-Chem oceanic DMS values in the region to match measurements, GEOS-Chem reproduced the major features of the measured time series but was biased low overall (2–1006 pptv, median 72 pptv), although within the range of uncertainty of the seawater DMS source. However, during some 1–2 day periods the model underpredicted the measurements by more than an order of magnitude. Sensitivity tests indicated that non-marine sources (lakes, biomass burning, melt ponds, and coastal tundra) could make additional episodic contributions to atmospheric DMS in the study region, although local marine sources of DMS dominated. Our results highlight the need ... Article in Journal/Newspaper Arctic Baffin Bay Baffin Bay Baffin Canadian Archipelago Hudson Bay Lancaster Sound Tundra Directory of Open Access Journals: DOAJ Articles Arctic Baffin Bay Hudson Hudson Bay Lancaster Sound ENVELOPE(-83.999,-83.999,74.218,74.218) Atmospheric Chemistry and Physics 16 11 6665 6680 |
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Open Polar |
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English |
topic |
Physics QC1-999 Chemistry QD1-999 |
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Physics QC1-999 Chemistry QD1-999 E. L. Mungall B. Croft M. Lizotte J. L. Thomas J. G. Murphy M. Levasseur R. V. Martin J. J. B. Wentzell J. Liggio J. P. D. Abbatt Dimethyl sulfide in the summertime Arctic atmosphere: measurements and source sensitivity simulations |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
Dimethyl sulfide (DMS) plays a major role in the global sulfur cycle. In addition, its atmospheric oxidation products contribute to the formation and growth of atmospheric aerosol particles, thereby influencing cloud condensation nuclei (CCN) populations and thus cloud formation. The pristine summertime Arctic atmosphere is strongly influenced by DMS. However, atmospheric DMS mixing ratios have only rarely been measured in the summertime Arctic. During July–August, 2014, we conducted the first high time resolution (10 Hz) DMS mixing ratio measurements for the eastern Canadian Archipelago and Baffin Bay as one component of the Network on Climate and Aerosols: Addressing Key Uncertainties in Remote Canadian Environments (NETCARE). DMS mixing ratios ranged from below the detection limit of 4 to 1155 pptv (median 186 pptv) during the 21-day shipboard campaign. A transfer velocity parameterization from the literature coupled with coincident atmospheric and seawater DMS measurements yielded air–sea DMS flux estimates ranging from 0.02 to 12 µmol m −2 d −1 . Air-mass trajectory analysis using FLEXPART-WRF and sensitivity simulations with the GEOS-Chem chemical transport model indicated that local sources (Lancaster Sound and Baffin Bay) were the dominant contributors to the DMS measured along the 21-day ship track, with episodic transport from the Hudson Bay System. After adjusting GEOS-Chem oceanic DMS values in the region to match measurements, GEOS-Chem reproduced the major features of the measured time series but was biased low overall (2–1006 pptv, median 72 pptv), although within the range of uncertainty of the seawater DMS source. However, during some 1–2 day periods the model underpredicted the measurements by more than an order of magnitude. Sensitivity tests indicated that non-marine sources (lakes, biomass burning, melt ponds, and coastal tundra) could make additional episodic contributions to atmospheric DMS in the study region, although local marine sources of DMS dominated. Our results highlight the need ... |
format |
Article in Journal/Newspaper |
author |
E. L. Mungall B. Croft M. Lizotte J. L. Thomas J. G. Murphy M. Levasseur R. V. Martin J. J. B. Wentzell J. Liggio J. P. D. Abbatt |
author_facet |
E. L. Mungall B. Croft M. Lizotte J. L. Thomas J. G. Murphy M. Levasseur R. V. Martin J. J. B. Wentzell J. Liggio J. P. D. Abbatt |
author_sort |
E. L. Mungall |
title |
Dimethyl sulfide in the summertime Arctic atmosphere: measurements and source sensitivity simulations |
title_short |
Dimethyl sulfide in the summertime Arctic atmosphere: measurements and source sensitivity simulations |
title_full |
Dimethyl sulfide in the summertime Arctic atmosphere: measurements and source sensitivity simulations |
title_fullStr |
Dimethyl sulfide in the summertime Arctic atmosphere: measurements and source sensitivity simulations |
title_full_unstemmed |
Dimethyl sulfide in the summertime Arctic atmosphere: measurements and source sensitivity simulations |
title_sort |
dimethyl sulfide in the summertime arctic atmosphere: measurements and source sensitivity simulations |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/acp-16-6665-2016 https://doaj.org/article/a7fdc923fe8c456ba87ab83e8790079e |
long_lat |
ENVELOPE(-83.999,-83.999,74.218,74.218) |
geographic |
Arctic Baffin Bay Hudson Hudson Bay Lancaster Sound |
geographic_facet |
Arctic Baffin Bay Hudson Hudson Bay Lancaster Sound |
genre |
Arctic Baffin Bay Baffin Bay Baffin Canadian Archipelago Hudson Bay Lancaster Sound Tundra |
genre_facet |
Arctic Baffin Bay Baffin Bay Baffin Canadian Archipelago Hudson Bay Lancaster Sound Tundra |
op_source |
Atmospheric Chemistry and Physics, Vol 16, Pp 6665-6680 (2016) |
op_relation |
https://www.atmos-chem-phys.net/16/6665/2016/acp-16-6665-2016.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-16-6665-2016 1680-7316 1680-7324 https://doaj.org/article/a7fdc923fe8c456ba87ab83e8790079e |
op_doi |
https://doi.org/10.5194/acp-16-6665-2016 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
16 |
container_issue |
11 |
container_start_page |
6665 |
op_container_end_page |
6680 |
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1766328986644774912 |