Year-round record of bulk and size-segregated aerosol composition in central Antarctica (Concordia site) – Part 2: Biogenic sulfur (sulfate and methanesulfonate) aerosol
Multiple year-round (2006–2015) records of the bulk and size-segregated composition of aerosol were obtained at the inland site of Concordia located in East Antarctica. The well-marked maximum of non-sea-salt sulfate (nssSO 4 ) in January (100 ± 28 ng m −3 versus 4.4 ± 2.3 ng m −3 in July) is consis...
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ftdoajarticles:oai:doaj.org/article:3f6bb570ecf04294a4c8363b3ccf58e1 2023-05-15T13:48:18+02:00 Year-round record of bulk and size-segregated aerosol composition in central Antarctica (Concordia site) – Part 2: Biogenic sulfur (sulfate and methanesulfonate) aerosol M. Legrand S. Preunkert R. Weller L. Zipf C. Elsässer S. Merchel G. Rugel D. Wagenbach 2017-11-01T00:00:00Z https://doi.org/10.5194/acp-17-14055-2017 https://doaj.org/article/3f6bb570ecf04294a4c8363b3ccf58e1 EN eng Copernicus Publications https://www.atmos-chem-phys.net/17/14055/2017/acp-17-14055-2017.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-17-14055-2017 1680-7316 1680-7324 https://doaj.org/article/3f6bb570ecf04294a4c8363b3ccf58e1 Atmospheric Chemistry and Physics, Vol 17, Pp 14055-14073 (2017) Physics QC1-999 Chemistry QD1-999 article 2017 ftdoajarticles https://doi.org/10.5194/acp-17-14055-2017 2022-12-31T05:59:28Z Multiple year-round (2006–2015) records of the bulk and size-segregated composition of aerosol were obtained at the inland site of Concordia located in East Antarctica. The well-marked maximum of non-sea-salt sulfate (nssSO 4 ) in January (100 ± 28 ng m −3 versus 4.4 ± 2.3 ng m −3 in July) is consistent with observations made at the coast (280 ± 78 ng m −3 in January versus 16 ± 9 ng m −3 in July at Dumont d'Urville, for instance). In contrast, the well-marked maximum of MSA at the coast in January (60 ± 23 ng m −3 at Dumont d'Urville) is not observed at Concordia (5.2 ± 2.0 ng m −3 in January). Instead, the MSA level at Concordia peaks in October (5.6 ± 1.9 ng m −3 ) and March (14.9 ± 5.7 ng m −3 ). As a result, a surprisingly low MSA-to-nssSO 4 ratio (R MSA ) is observed at Concordia in mid-summer (0.05 ± 0.02 in January versus 0.25 ± 0.09 in March). We find that the low value of R MSA in mid-summer at Concordia is mainly driven by a drop of MSA levels that takes place in submicron aerosol (0.3 µm diameter). The drop of MSA coincides with periods of high photochemical activity as indicated by high ozone levels, strongly suggesting the occurrence of an efficient chemical destruction of MSA over the Antarctic plateau in mid-summer. The relationship between MSA and nssSO 4 levels is examined separately for each season and indicates that concentration of non-biogenic sulfate over the Antarctic plateau does not exceed 1 ng m −3 in fall and winter and remains close to 5 ng m −3 in spring. This weak non-biogenic sulfate level is discussed in the light of radionuclides ( 210 Pb, 10 Be, and 7 Be) also measured on bulk aerosol samples collected at Concordia. The findings highlight the complexity in using MSA in deep ice cores extracted from inland Antarctica as a proxy of past dimethyl sulfide emissions from the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean The Antarctic East Antarctica Dumont d'Urville ENVELOPE(140.017,140.017,-66.667,-66.667) Dumont-d'Urville ENVELOPE(140.013,140.013,-66.667,-66.667) Atmospheric Chemistry and Physics 17 22 14055 14073 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 M. Legrand S. Preunkert R. Weller L. Zipf C. Elsässer S. Merchel G. Rugel D. Wagenbach Year-round record of bulk and size-segregated aerosol composition in central Antarctica (Concordia site) – Part 2: Biogenic sulfur (sulfate and methanesulfonate) aerosol |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
Multiple year-round (2006–2015) records of the bulk and size-segregated composition of aerosol were obtained at the inland site of Concordia located in East Antarctica. The well-marked maximum of non-sea-salt sulfate (nssSO 4 ) in January (100 ± 28 ng m −3 versus 4.4 ± 2.3 ng m −3 in July) is consistent with observations made at the coast (280 ± 78 ng m −3 in January versus 16 ± 9 ng m −3 in July at Dumont d'Urville, for instance). In contrast, the well-marked maximum of MSA at the coast in January (60 ± 23 ng m −3 at Dumont d'Urville) is not observed at Concordia (5.2 ± 2.0 ng m −3 in January). Instead, the MSA level at Concordia peaks in October (5.6 ± 1.9 ng m −3 ) and March (14.9 ± 5.7 ng m −3 ). As a result, a surprisingly low MSA-to-nssSO 4 ratio (R MSA ) is observed at Concordia in mid-summer (0.05 ± 0.02 in January versus 0.25 ± 0.09 in March). We find that the low value of R MSA in mid-summer at Concordia is mainly driven by a drop of MSA levels that takes place in submicron aerosol (0.3 µm diameter). The drop of MSA coincides with periods of high photochemical activity as indicated by high ozone levels, strongly suggesting the occurrence of an efficient chemical destruction of MSA over the Antarctic plateau in mid-summer. The relationship between MSA and nssSO 4 levels is examined separately for each season and indicates that concentration of non-biogenic sulfate over the Antarctic plateau does not exceed 1 ng m −3 in fall and winter and remains close to 5 ng m −3 in spring. This weak non-biogenic sulfate level is discussed in the light of radionuclides ( 210 Pb, 10 Be, and 7 Be) also measured on bulk aerosol samples collected at Concordia. The findings highlight the complexity in using MSA in deep ice cores extracted from inland Antarctica as a proxy of past dimethyl sulfide emissions from the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
M. Legrand S. Preunkert R. Weller L. Zipf C. Elsässer S. Merchel G. Rugel D. Wagenbach |
author_facet |
M. Legrand S. Preunkert R. Weller L. Zipf C. Elsässer S. Merchel G. Rugel D. Wagenbach |
author_sort |
M. Legrand |
title |
Year-round record of bulk and size-segregated aerosol composition in central Antarctica (Concordia site) – Part 2: Biogenic sulfur (sulfate and methanesulfonate) aerosol |
title_short |
Year-round record of bulk and size-segregated aerosol composition in central Antarctica (Concordia site) – Part 2: Biogenic sulfur (sulfate and methanesulfonate) aerosol |
title_full |
Year-round record of bulk and size-segregated aerosol composition in central Antarctica (Concordia site) – Part 2: Biogenic sulfur (sulfate and methanesulfonate) aerosol |
title_fullStr |
Year-round record of bulk and size-segregated aerosol composition in central Antarctica (Concordia site) – Part 2: Biogenic sulfur (sulfate and methanesulfonate) aerosol |
title_full_unstemmed |
Year-round record of bulk and size-segregated aerosol composition in central Antarctica (Concordia site) – Part 2: Biogenic sulfur (sulfate and methanesulfonate) aerosol |
title_sort |
year-round record of bulk and size-segregated aerosol composition in central antarctica (concordia site) – part 2: biogenic sulfur (sulfate and methanesulfonate) aerosol |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/acp-17-14055-2017 https://doaj.org/article/3f6bb570ecf04294a4c8363b3ccf58e1 |
long_lat |
ENVELOPE(140.017,140.017,-66.667,-66.667) ENVELOPE(140.013,140.013,-66.667,-66.667) |
geographic |
Antarctic Southern Ocean The Antarctic East Antarctica Dumont d'Urville Dumont-d'Urville |
geographic_facet |
Antarctic Southern Ocean The Antarctic East Antarctica Dumont d'Urville Dumont-d'Urville |
genre |
Antarc* Antarctic Antarctica East Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Southern Ocean |
op_source |
Atmospheric Chemistry and Physics, Vol 17, Pp 14055-14073 (2017) |
op_relation |
https://www.atmos-chem-phys.net/17/14055/2017/acp-17-14055-2017.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-17-14055-2017 1680-7316 1680-7324 https://doaj.org/article/3f6bb570ecf04294a4c8363b3ccf58e1 |
op_doi |
https://doi.org/10.5194/acp-17-14055-2017 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
17 |
container_issue |
22 |
container_start_page |
14055 |
op_container_end_page |
14073 |
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1766249084818030592 |