Shipborne measurements of Antarctic submicron organic aerosols: an NMR perspective linking multiple sources and bioregions
Abstract. The concentrations of submicron aerosol particles in maritime regions around Antarctica are influenced by the extent of sea ice. This effect is two ways: on one side, sea ice regulates the production of particles by sea spray (primary aerosols); on the other side, it hosts complex communit...
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ftopenaccessrep:oai:zenodo.org:68250 2023-05-15T13:47:41+02:00 Shipborne measurements of Antarctic submicron organic aerosols: an NMR perspective linking multiple sources and bioregions Stefano Decesari Marco Paglione Matteo Rinaldi Manuel Dall'Osto Rafel Simó Nicola Zanca Francesca Volpi Maria Cristina Facchini Thorsten Hoffmann Sven Götz Christopher Johannes Kampf Colin O'Dowd Jurgita Ovadnevaite Darius Ceburnis Emilio Tagliavini 2020-04-01 https://www.openaccessrepository.it/record/68250 https://doi.org/10.5194/acp-20-4193-2020 eng eng info:eu-repo/grantAgreement/EC/FP7/603445/ url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/68250 doi:10.5194/acp-20-4193-2020 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ CC-BY Atmospheric Science European Commission info:eu-repo/semantics/article publication-article 2020 ftopenaccessrep https://doi.org/10.5194/acp-20-4193-2020 2022-11-23T06:46:23Z Abstract. The concentrations of submicron aerosol particles in maritime regions around Antarctica are influenced by the extent of sea ice. This effect is two ways: on one side, sea ice regulates the production of particles by sea spray (primary aerosols); on the other side, it hosts complex communities of organisms emitting precursors for secondary particles. Past studies documenting the chemical composition of fine aerosols in Antarctica indicate various potential primary and secondary sources active in coastal areas, in offshore marine regions, and in the sea ice itself. In particular, beside the well-known sources of organic and sulfur material originating from the oxidation of dimethylsulfide (DMS) produced by microalgae, recent findings obtained during the 2015 PEGASO cruise suggest that nitrogen-containing organic compounds are also produced by the microbiota colonizing the marginal ice zone. To complement the aerosol source apportionment performed using online mass spectrometric techniques, here we discuss the outcomes of offline spectroscopic analysis performed by nuclear magnetic resonance (NMR) spectroscopy. In this study we (i) present the composition of ambient aerosols over open-ocean waters across bioregions, and compare it to the composition of (ii) seawater samples and (iii) bubble-bursting aerosols produced in a sea-spray chamber onboard the ship. Our results show that the process of aerosolization in the tank enriches primary marine particles with lipids and sugars while depleting them of free amino acids, providing an explanation for why amino acids occurred only at trace concentrations in the marine aerosol samples analyzed. The analysis of water-soluble organic carbon (WSOC) in ambient submicron aerosol samples shows distinct NMR fingerprints for three bioregions: (1) the open Southern Ocean pelagic environments, in which aerosols are enriched with primary marine particles containing lipids and sugars; (2) sympagic areas in the Weddell Sea, where secondary organic compounds, including ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice Southern Ocean Weddell Sea Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository Antarctic Southern Ocean Weddell Sea Weddell Atmospheric Chemistry and Physics 20 7 4193 4207 |
institution |
Open Polar |
collection |
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
op_collection_id |
ftopenaccessrep |
language |
English |
topic |
Atmospheric Science European Commission |
spellingShingle |
Atmospheric Science European Commission Stefano Decesari Marco Paglione Matteo Rinaldi Manuel Dall'Osto Rafel Simó Nicola Zanca Francesca Volpi Maria Cristina Facchini Thorsten Hoffmann Sven Götz Christopher Johannes Kampf Colin O'Dowd Jurgita Ovadnevaite Darius Ceburnis Emilio Tagliavini Shipborne measurements of Antarctic submicron organic aerosols: an NMR perspective linking multiple sources and bioregions |
topic_facet |
Atmospheric Science European Commission |
description |
Abstract. The concentrations of submicron aerosol particles in maritime regions around Antarctica are influenced by the extent of sea ice. This effect is two ways: on one side, sea ice regulates the production of particles by sea spray (primary aerosols); on the other side, it hosts complex communities of organisms emitting precursors for secondary particles. Past studies documenting the chemical composition of fine aerosols in Antarctica indicate various potential primary and secondary sources active in coastal areas, in offshore marine regions, and in the sea ice itself. In particular, beside the well-known sources of organic and sulfur material originating from the oxidation of dimethylsulfide (DMS) produced by microalgae, recent findings obtained during the 2015 PEGASO cruise suggest that nitrogen-containing organic compounds are also produced by the microbiota colonizing the marginal ice zone. To complement the aerosol source apportionment performed using online mass spectrometric techniques, here we discuss the outcomes of offline spectroscopic analysis performed by nuclear magnetic resonance (NMR) spectroscopy. In this study we (i) present the composition of ambient aerosols over open-ocean waters across bioregions, and compare it to the composition of (ii) seawater samples and (iii) bubble-bursting aerosols produced in a sea-spray chamber onboard the ship. Our results show that the process of aerosolization in the tank enriches primary marine particles with lipids and sugars while depleting them of free amino acids, providing an explanation for why amino acids occurred only at trace concentrations in the marine aerosol samples analyzed. The analysis of water-soluble organic carbon (WSOC) in ambient submicron aerosol samples shows distinct NMR fingerprints for three bioregions: (1) the open Southern Ocean pelagic environments, in which aerosols are enriched with primary marine particles containing lipids and sugars; (2) sympagic areas in the Weddell Sea, where secondary organic compounds, including ... |
format |
Article in Journal/Newspaper |
author |
Stefano Decesari Marco Paglione Matteo Rinaldi Manuel Dall'Osto Rafel Simó Nicola Zanca Francesca Volpi Maria Cristina Facchini Thorsten Hoffmann Sven Götz Christopher Johannes Kampf Colin O'Dowd Jurgita Ovadnevaite Darius Ceburnis Emilio Tagliavini |
author_facet |
Stefano Decesari Marco Paglione Matteo Rinaldi Manuel Dall'Osto Rafel Simó Nicola Zanca Francesca Volpi Maria Cristina Facchini Thorsten Hoffmann Sven Götz Christopher Johannes Kampf Colin O'Dowd Jurgita Ovadnevaite Darius Ceburnis Emilio Tagliavini |
author_sort |
Stefano Decesari |
title |
Shipborne measurements of Antarctic submicron organic aerosols: an NMR perspective linking multiple sources and bioregions |
title_short |
Shipborne measurements of Antarctic submicron organic aerosols: an NMR perspective linking multiple sources and bioregions |
title_full |
Shipborne measurements of Antarctic submicron organic aerosols: an NMR perspective linking multiple sources and bioregions |
title_fullStr |
Shipborne measurements of Antarctic submicron organic aerosols: an NMR perspective linking multiple sources and bioregions |
title_full_unstemmed |
Shipborne measurements of Antarctic submicron organic aerosols: an NMR perspective linking multiple sources and bioregions |
title_sort |
shipborne measurements of antarctic submicron organic aerosols: an nmr perspective linking multiple sources and bioregions |
publishDate |
2020 |
url |
https://www.openaccessrepository.it/record/68250 https://doi.org/10.5194/acp-20-4193-2020 |
geographic |
Antarctic Southern Ocean Weddell Sea Weddell |
geographic_facet |
Antarctic Southern Ocean Weddell Sea Weddell |
genre |
Antarc* Antarctic Antarctica Sea ice Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Sea ice Southern Ocean Weddell Sea |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/603445/ url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/68250 doi:10.5194/acp-20-4193-2020 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/acp-20-4193-2020 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
20 |
container_issue |
7 |
container_start_page |
4193 |
op_container_end_page |
4207 |
_version_ |
1766247674399424512 |