Ice-nucleating particles in Canadian Arctic sea-surface microlayer and bulk seawater
The sea-surface microlayer and bulk seawater can contain ice-nucleating particles (INPs) and these INPs can be emitted into the atmosphere. Our current understanding of the properties, concentrations, and spatial and temporal distributions of INPs in the microlayer and bulk seawater is limited. In t...
Published in: | Atmospheric Chemistry and Physics |
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ftcopernicus:oai:publications.copernicus.org:acp58644 2023-05-15T14:48:19+02:00 Ice-nucleating particles in Canadian Arctic sea-surface microlayer and bulk seawater Irish, Victoria E. Elizondo, Pablo Chen, Jessie Chou, Cédric Charette, Joannie Lizotte, Martine Ladino, Luis A. Wilson, Theodore W. Gosselin, Michel Murray, Benjamin J. Polishchuk, Elena Abbatt, Jonathan P. D. Miller, Lisa A. Bertram, Allan K. 2018-09-18 application/pdf https://doi.org/10.5194/acp-17-10583-2017 https://www.atmos-chem-phys.net/17/10583/2017/ eng eng doi:10.5194/acp-17-10583-2017 https://www.atmos-chem-phys.net/17/10583/2017/ eISSN: 1680-7324 Text 2018 ftcopernicus https://doi.org/10.5194/acp-17-10583-2017 2019-12-24T09:51:09Z The sea-surface microlayer and bulk seawater can contain ice-nucleating particles (INPs) and these INPs can be emitted into the atmosphere. Our current understanding of the properties, concentrations, and spatial and temporal distributions of INPs in the microlayer and bulk seawater is limited. In this study we investigate the concentrations and properties of INPs in microlayer and bulk seawater samples collected in the Canadian Arctic during the summer of 2014. INPs were ubiquitous in the microlayer and bulk seawater with freezing temperatures in the immersion mode as high as −14 °C. A strong negative correlation ( R = −0. 7, p = 0. 02) was observed between salinity and freezing temperatures (after correction for freezing depression by the salts). One possible explanation is that INPs were associated with melting sea ice. Heat and filtration treatments of the samples show that the INPs were likely heat-labile biological materials with sizes between 0.02 and 0.2 µm in diameter, consistent with previous measurements off the coast of North America and near Greenland in the Arctic. The concentrations of INPs in the microlayer and bulk seawater were consistent with previous measurements at several other locations off the coast of North America. However, our average microlayer concentration was lower than previous observations made near Greenland in the Arctic. This difference could not be explained by chlorophyll a concentrations derived from satellite measurements. In addition, previous studies found significant INP enrichment in the microlayer, relative to bulk seawater, which we did not observe in this study. While further studies are needed to understand these differences, we confirm that there is a source of INP in the microlayer and bulk seawater in the Canadian Arctic that may be important for atmospheric INP concentrations. Text Arctic Greenland Sea ice Copernicus Publications: E-Journals Arctic Greenland Atmospheric Chemistry and Physics 17 17 10583 10595 |
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Open Polar |
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Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
The sea-surface microlayer and bulk seawater can contain ice-nucleating particles (INPs) and these INPs can be emitted into the atmosphere. Our current understanding of the properties, concentrations, and spatial and temporal distributions of INPs in the microlayer and bulk seawater is limited. In this study we investigate the concentrations and properties of INPs in microlayer and bulk seawater samples collected in the Canadian Arctic during the summer of 2014. INPs were ubiquitous in the microlayer and bulk seawater with freezing temperatures in the immersion mode as high as −14 °C. A strong negative correlation ( R = −0. 7, p = 0. 02) was observed between salinity and freezing temperatures (after correction for freezing depression by the salts). One possible explanation is that INPs were associated with melting sea ice. Heat and filtration treatments of the samples show that the INPs were likely heat-labile biological materials with sizes between 0.02 and 0.2 µm in diameter, consistent with previous measurements off the coast of North America and near Greenland in the Arctic. The concentrations of INPs in the microlayer and bulk seawater were consistent with previous measurements at several other locations off the coast of North America. However, our average microlayer concentration was lower than previous observations made near Greenland in the Arctic. This difference could not be explained by chlorophyll a concentrations derived from satellite measurements. In addition, previous studies found significant INP enrichment in the microlayer, relative to bulk seawater, which we did not observe in this study. While further studies are needed to understand these differences, we confirm that there is a source of INP in the microlayer and bulk seawater in the Canadian Arctic that may be important for atmospheric INP concentrations. |
format |
Text |
author |
Irish, Victoria E. Elizondo, Pablo Chen, Jessie Chou, Cédric Charette, Joannie Lizotte, Martine Ladino, Luis A. Wilson, Theodore W. Gosselin, Michel Murray, Benjamin J. Polishchuk, Elena Abbatt, Jonathan P. D. Miller, Lisa A. Bertram, Allan K. |
spellingShingle |
Irish, Victoria E. Elizondo, Pablo Chen, Jessie Chou, Cédric Charette, Joannie Lizotte, Martine Ladino, Luis A. Wilson, Theodore W. Gosselin, Michel Murray, Benjamin J. Polishchuk, Elena Abbatt, Jonathan P. D. Miller, Lisa A. Bertram, Allan K. Ice-nucleating particles in Canadian Arctic sea-surface microlayer and bulk seawater |
author_facet |
Irish, Victoria E. Elizondo, Pablo Chen, Jessie Chou, Cédric Charette, Joannie Lizotte, Martine Ladino, Luis A. Wilson, Theodore W. Gosselin, Michel Murray, Benjamin J. Polishchuk, Elena Abbatt, Jonathan P. D. Miller, Lisa A. Bertram, Allan K. |
author_sort |
Irish, Victoria E. |
title |
Ice-nucleating particles in Canadian Arctic sea-surface microlayer and bulk seawater |
title_short |
Ice-nucleating particles in Canadian Arctic sea-surface microlayer and bulk seawater |
title_full |
Ice-nucleating particles in Canadian Arctic sea-surface microlayer and bulk seawater |
title_fullStr |
Ice-nucleating particles in Canadian Arctic sea-surface microlayer and bulk seawater |
title_full_unstemmed |
Ice-nucleating particles in Canadian Arctic sea-surface microlayer and bulk seawater |
title_sort |
ice-nucleating particles in canadian arctic sea-surface microlayer and bulk seawater |
publishDate |
2018 |
url |
https://doi.org/10.5194/acp-17-10583-2017 https://www.atmos-chem-phys.net/17/10583/2017/ |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Sea ice |
genre_facet |
Arctic Greenland Sea ice |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-17-10583-2017 https://www.atmos-chem-phys.net/17/10583/2017/ |
op_doi |
https://doi.org/10.5194/acp-17-10583-2017 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
17 |
container_issue |
17 |
container_start_page |
10583 |
op_container_end_page |
10595 |
_version_ |
1766319405751336960 |