Aerosol source identification in the spring and summertime central Arctic Ocean using high-resolution mass spectrometry during MOSAiC.
The Arctic region is undergoing considerable changes and is warming at a rate three to four times as fast as the rest of the world. Aerosols, which can originate from natural or anthropogenic sources, both of which can be locally emitted or long-range transported, play a crucial role in the Arctic r...
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ftinfoscience:oai:infoscience.epfl.ch:306843 2024-01-14T10:03:39+01:00 Aerosol source identification in the spring and summertime central Arctic Ocean using high-resolution mass spectrometry during MOSAiC. Heutte, Benjamin Dada, Lubna Angot, Hélène El Haddad, Imad Chen, Gang Dällenbach, Kaspar R. B. Pernov, Jakob Beck, Ivo Quéléver, Lauriane Laurila, Tiia Jokinen, Tuija Schmale, Julia 2023-12-11T10:27:15Z http://infoscience.epfl.ch/record/306843 unknown http://infoscience.epfl.ch/record/306843 http://infoscience.epfl.ch/record/306843 Text 2023 ftinfoscience 2023-12-18T00:50:02Z The Arctic region is undergoing considerable changes and is warming at a rate three to four times as fast as the rest of the world. Aerosols, which can originate from natural or anthropogenic sources, both of which can be locally emitted or long-range transported, play a crucial role in the Arctic radiative balance by directly absorbing or scattering incoming solar radiation or indirectly by changing cloud properties and modulating cloud formation mechanisms. Here, we investigate the sources of anthropogenic and natural aerosols in the central Arctic Ocean, using data collected during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition with a high-resolution time-of-flight aerosol mass spectrometer. Using positive matrix factorization on the organic fraction of aerosols during spring and summertime (March – July), we identified six distinct chemical sources of organic aerosols (OA): a hydrocarbon-like factor, a Haze factor, two factors related to two extreme events of warm and moist air mass intrusions (WAMI) in mid-April, an Arctic oxygenated factor, and a Marine factor. We also describe the geographical origin of these factors, inferred from a potential source contribution function applied on 3-hourly back-trajectories. Together, these results suggest that OA from Eurasian anthropogenic origin (including the two extreme WAMI events in mid-April) dominate the central Arctic OA budget until at least the month of May, where episodic spikes in naturally-sourced marine OA, originating from the Fram Strait marginal ice-zone start to become important through June and July. We also highlight a hitherto unreported highly-oxygenated organic factor, whose temporal variability is closely related to that of particulate ammonium (maximum concentration in May) and whose geographical origin, in the Canadian archipelagoes, could indicate a co-emission mechanism of organic aerosols and ammonia from Arctic seabird colonies. Text Arctic Arctic Ocean Fram Strait EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne) Arctic Arctic Ocean |
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EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne) |
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ftinfoscience |
language |
unknown |
description |
The Arctic region is undergoing considerable changes and is warming at a rate three to four times as fast as the rest of the world. Aerosols, which can originate from natural or anthropogenic sources, both of which can be locally emitted or long-range transported, play a crucial role in the Arctic radiative balance by directly absorbing or scattering incoming solar radiation or indirectly by changing cloud properties and modulating cloud formation mechanisms. Here, we investigate the sources of anthropogenic and natural aerosols in the central Arctic Ocean, using data collected during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition with a high-resolution time-of-flight aerosol mass spectrometer. Using positive matrix factorization on the organic fraction of aerosols during spring and summertime (March – July), we identified six distinct chemical sources of organic aerosols (OA): a hydrocarbon-like factor, a Haze factor, two factors related to two extreme events of warm and moist air mass intrusions (WAMI) in mid-April, an Arctic oxygenated factor, and a Marine factor. We also describe the geographical origin of these factors, inferred from a potential source contribution function applied on 3-hourly back-trajectories. Together, these results suggest that OA from Eurasian anthropogenic origin (including the two extreme WAMI events in mid-April) dominate the central Arctic OA budget until at least the month of May, where episodic spikes in naturally-sourced marine OA, originating from the Fram Strait marginal ice-zone start to become important through June and July. We also highlight a hitherto unreported highly-oxygenated organic factor, whose temporal variability is closely related to that of particulate ammonium (maximum concentration in May) and whose geographical origin, in the Canadian archipelagoes, could indicate a co-emission mechanism of organic aerosols and ammonia from Arctic seabird colonies. |
format |
Text |
author |
Heutte, Benjamin Dada, Lubna Angot, Hélène El Haddad, Imad Chen, Gang Dällenbach, Kaspar R. B. Pernov, Jakob Beck, Ivo Quéléver, Lauriane Laurila, Tiia Jokinen, Tuija Schmale, Julia |
spellingShingle |
Heutte, Benjamin Dada, Lubna Angot, Hélène El Haddad, Imad Chen, Gang Dällenbach, Kaspar R. B. Pernov, Jakob Beck, Ivo Quéléver, Lauriane Laurila, Tiia Jokinen, Tuija Schmale, Julia Aerosol source identification in the spring and summertime central Arctic Ocean using high-resolution mass spectrometry during MOSAiC. |
author_facet |
Heutte, Benjamin Dada, Lubna Angot, Hélène El Haddad, Imad Chen, Gang Dällenbach, Kaspar R. B. Pernov, Jakob Beck, Ivo Quéléver, Lauriane Laurila, Tiia Jokinen, Tuija Schmale, Julia |
author_sort |
Heutte, Benjamin |
title |
Aerosol source identification in the spring and summertime central Arctic Ocean using high-resolution mass spectrometry during MOSAiC. |
title_short |
Aerosol source identification in the spring and summertime central Arctic Ocean using high-resolution mass spectrometry during MOSAiC. |
title_full |
Aerosol source identification in the spring and summertime central Arctic Ocean using high-resolution mass spectrometry during MOSAiC. |
title_fullStr |
Aerosol source identification in the spring and summertime central Arctic Ocean using high-resolution mass spectrometry during MOSAiC. |
title_full_unstemmed |
Aerosol source identification in the spring and summertime central Arctic Ocean using high-resolution mass spectrometry during MOSAiC. |
title_sort |
aerosol source identification in the spring and summertime central arctic ocean using high-resolution mass spectrometry during mosaic. |
publishDate |
2023 |
url |
http://infoscience.epfl.ch/record/306843 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Fram Strait |
genre_facet |
Arctic Arctic Ocean Fram Strait |
op_source |
http://infoscience.epfl.ch/record/306843 |
op_relation |
http://infoscience.epfl.ch/record/306843 |
_version_ |
1788058375337017344 |