Overview of the atmospheric research program during the International Arctic Ocean Expedition of 1991 (IAOE-91) and its scientific results
The broad aim of the Atmospheric program of the International Arctic Ocean Expedition (IAOE-91) was to test the hypothesis that marine biogenically produced dimethyl sulfide (DMS) gas can exert a significant global climatic control. The hypothesis states that DMS is transferred to the atmosphere and...
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ftleibnizopen:oai:oai.leibnizopen.de:rJNR04kBdbrxVwz6xwKk 2023-10-01T03:49:54+02:00 Overview of the atmospheric research program during the International Arctic Ocean Expedition of 1991 (IAOE-91) and its scientific results Leck, C. Bigg, E.K. Covert, D.S. Heintzenberg, J. Maenhaut, W. Nilsson, E.D. Wiedensohler, A. 2017 application/pdf https://doi.org/10.34657/1150 https://oa.tib.eu/renate/handle/123456789/432 eng eng Milton Park : Taylor & Francis CC BY 4.0 Unported https://creativecommons.org/licenses/by/4.0/ Tellus B: Chemical and Physical Meteorology, Volume 48, Issue 2, Page 136-155 aerosols atmospheric particulates atmospheric research programme cloud albedo cloud condensation nuclei condensation nuclei dimethyl/sulphide dimethylsulphide global sulphur cycle IAOE-91 International Arctic Ocean Expedition research programmes 550 article Text 2017 ftleibnizopen https://doi.org/10.34657/1150 2023-09-03T23:25:12Z The broad aim of the Atmospheric program of the International Arctic Ocean Expedition (IAOE-91) was to test the hypothesis that marine biogenically produced dimethyl sulfide (DMS) gas can exert a significant global climatic control. The hypothesis states that DMS is transferred to the atmosphere and is oxidised to form airborne particles. Some of these grow large enough to act as cloud condensation nuclei (CCN) which help determine cloud droplet concentration. The latter has a strong influence on cloud albedo and hence on the radiation balance of the area affected. In summer, the central Arctic is a specially favourable region for studying the natural sulfur cycle in that the open waters surrounding the pack ice are the only significant sources of DMS and there are almost no anthropogenic particle sources. Concentrations of seawater and atmospheric DMS decreased at about the same rate during the period of measurements, (1 August to 6 October, latitudes 75°N to 90°N) spanning about three orders of magnitude. Methane sulfonate and nonsea salt sulfate in the submicrometer particles, which may be derived from atmospheric DMS, also decreased similarly, suggesting that the first part of the hypothesis under test was true. Influences on cloud droplet concentration and radiation balance could not be measured. Size-resolved aerosol chemistry showed a much lower proportion of methane sulfonate to be associated with supermicrometer particles than has been found elsewhere. Its molar ratio to nonsea salt sulfate suggested that the processes controlling the particulate chemistry do not exhibit a net temperature dependence. Elemental analysis of the aerosol also revealed the interesting possibility that debris from Siberian rivers transported on the moving ice represent a fairly widespread source of supermicrometer crustal material within the pack ice. Highly resolved measurements of aerosol number size distributions were made in the diameter range 3 nm to 500 nm. 3 distinct modal sizes were usually present, the “ultrafine”, ... Article in Journal/Newspaper albedo Arctic Arctic Ocean LeibnizOpen (The Leibniz Association) Arctic Arctic Ocean |
institution |
Open Polar |
collection |
LeibnizOpen (The Leibniz Association) |
op_collection_id |
ftleibnizopen |
language |
English |
topic |
aerosols atmospheric particulates atmospheric research programme cloud albedo cloud condensation nuclei condensation nuclei dimethyl/sulphide dimethylsulphide global sulphur cycle IAOE-91 International Arctic Ocean Expedition research programmes 550 |
spellingShingle |
aerosols atmospheric particulates atmospheric research programme cloud albedo cloud condensation nuclei condensation nuclei dimethyl/sulphide dimethylsulphide global sulphur cycle IAOE-91 International Arctic Ocean Expedition research programmes 550 Leck, C. Bigg, E.K. Covert, D.S. Heintzenberg, J. Maenhaut, W. Nilsson, E.D. Wiedensohler, A. Overview of the atmospheric research program during the International Arctic Ocean Expedition of 1991 (IAOE-91) and its scientific results |
topic_facet |
aerosols atmospheric particulates atmospheric research programme cloud albedo cloud condensation nuclei condensation nuclei dimethyl/sulphide dimethylsulphide global sulphur cycle IAOE-91 International Arctic Ocean Expedition research programmes 550 |
description |
The broad aim of the Atmospheric program of the International Arctic Ocean Expedition (IAOE-91) was to test the hypothesis that marine biogenically produced dimethyl sulfide (DMS) gas can exert a significant global climatic control. The hypothesis states that DMS is transferred to the atmosphere and is oxidised to form airborne particles. Some of these grow large enough to act as cloud condensation nuclei (CCN) which help determine cloud droplet concentration. The latter has a strong influence on cloud albedo and hence on the radiation balance of the area affected. In summer, the central Arctic is a specially favourable region for studying the natural sulfur cycle in that the open waters surrounding the pack ice are the only significant sources of DMS and there are almost no anthropogenic particle sources. Concentrations of seawater and atmospheric DMS decreased at about the same rate during the period of measurements, (1 August to 6 October, latitudes 75°N to 90°N) spanning about three orders of magnitude. Methane sulfonate and nonsea salt sulfate in the submicrometer particles, which may be derived from atmospheric DMS, also decreased similarly, suggesting that the first part of the hypothesis under test was true. Influences on cloud droplet concentration and radiation balance could not be measured. Size-resolved aerosol chemistry showed a much lower proportion of methane sulfonate to be associated with supermicrometer particles than has been found elsewhere. Its molar ratio to nonsea salt sulfate suggested that the processes controlling the particulate chemistry do not exhibit a net temperature dependence. Elemental analysis of the aerosol also revealed the interesting possibility that debris from Siberian rivers transported on the moving ice represent a fairly widespread source of supermicrometer crustal material within the pack ice. Highly resolved measurements of aerosol number size distributions were made in the diameter range 3 nm to 500 nm. 3 distinct modal sizes were usually present, the “ultrafine”, ... |
format |
Article in Journal/Newspaper |
author |
Leck, C. Bigg, E.K. Covert, D.S. Heintzenberg, J. Maenhaut, W. Nilsson, E.D. Wiedensohler, A. |
author_facet |
Leck, C. Bigg, E.K. Covert, D.S. Heintzenberg, J. Maenhaut, W. Nilsson, E.D. Wiedensohler, A. |
author_sort |
Leck, C. |
title |
Overview of the atmospheric research program during the International Arctic Ocean Expedition of 1991 (IAOE-91) and its scientific results |
title_short |
Overview of the atmospheric research program during the International Arctic Ocean Expedition of 1991 (IAOE-91) and its scientific results |
title_full |
Overview of the atmospheric research program during the International Arctic Ocean Expedition of 1991 (IAOE-91) and its scientific results |
title_fullStr |
Overview of the atmospheric research program during the International Arctic Ocean Expedition of 1991 (IAOE-91) and its scientific results |
title_full_unstemmed |
Overview of the atmospheric research program during the International Arctic Ocean Expedition of 1991 (IAOE-91) and its scientific results |
title_sort |
overview of the atmospheric research program during the international arctic ocean expedition of 1991 (iaoe-91) and its scientific results |
publisher |
Milton Park : Taylor & Francis |
publishDate |
2017 |
url |
https://doi.org/10.34657/1150 https://oa.tib.eu/renate/handle/123456789/432 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
albedo Arctic Arctic Ocean |
genre_facet |
albedo Arctic Arctic Ocean |
op_source |
Tellus B: Chemical and Physical Meteorology, Volume 48, Issue 2, Page 136-155 |
op_rights |
CC BY 4.0 Unported https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.34657/1150 |
_version_ |
1778516990176002048 |