Ice nucleating properties of airborne dust from an actively retreating glacier in Yukon, Canada
Airborne dust from glacial outwash sediments may alter properties of clouds and climate at high latitudes by acting as ice nucleating particles (INPs). Nevertheless, the ice nucleating ability of airborne dust from glacial outwash sediments remains uncertain. To address this uncertainty, we measured...
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Royal Society of Chemistry
2022
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/559647 2023-10-09T21:51:48+02:00 Ice nucleating properties of airborne dust from an actively retreating glacier in Yukon, Canada Xi, Yu Xu, Cuishan Downey, Arnold Stevens, Robin Bachelder, Jill id_orcid:0 000-0003-3787-1128 King, James Hayes, Patrick L. Bertram, Allan K. 2022 application/application/pdf https://hdl.handle.net/20.500.11850/559647 https://doi.org/10.3929/ethz-b-000559647 en eng Royal Society of Chemistry info:eu-repo/semantics/altIdentifier/doi/10.1039/d1ea00101a info:eu-repo/semantics/altIdentifier/wos/000826368900001 http://hdl.handle.net/20.500.11850/559647 doi:10.3929/ethz-b-000559647 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc/3.0/ Creative Commons Attribution-NonCommercial 3.0 Unported Environmental Science: Atmospheres, 2 (4) info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2022 ftethz https://doi.org/20.500.11850/55964710.3929/ethz-b-00055964710.1039/d1ea00101a 2023-09-17T23:49:49Z Airborne dust from glacial outwash sediments may alter properties of clouds and climate at high latitudes by acting as ice nucleating particles (INPs). Nevertheless, the ice nucleating ability of airborne dust from glacial outwash sediments remains uncertain. To address this uncertainty, we measured the ice nucleating ability of airborne dust near an actively retreating glacier in Yukon, Canada during a period when airborne dust concentrations were well above background levels and most likely originated from glacial outwash sediments in the region. The airborne dust caused freezing at temperatures from -6 to -23 degrees C. Based on a heat assay and an ammonium sulfate assay, the INPs from the airborne dust that caused freezing at temperatures warmer than -15 degrees C likely contained biological materials. We show that airborne dust from the retreating glacier likely led to high concentrations of ice nucleating particles at the site for at least most of May 2018. These concentrations, at a freezing temperature of -15 degrees C, were approximately one order of magnitude higher than predictions using a global chemical transport model that included low latitude natural dust sources, but not natural high latitude dust sources. ISSN:2634-3606 Article in Journal/Newspaper glacier* Yukon ETH Zürich Research Collection Canada Yukon |
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Open Polar |
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ETH Zürich Research Collection |
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ftethz |
language |
English |
description |
Airborne dust from glacial outwash sediments may alter properties of clouds and climate at high latitudes by acting as ice nucleating particles (INPs). Nevertheless, the ice nucleating ability of airborne dust from glacial outwash sediments remains uncertain. To address this uncertainty, we measured the ice nucleating ability of airborne dust near an actively retreating glacier in Yukon, Canada during a period when airborne dust concentrations were well above background levels and most likely originated from glacial outwash sediments in the region. The airborne dust caused freezing at temperatures from -6 to -23 degrees C. Based on a heat assay and an ammonium sulfate assay, the INPs from the airborne dust that caused freezing at temperatures warmer than -15 degrees C likely contained biological materials. We show that airborne dust from the retreating glacier likely led to high concentrations of ice nucleating particles at the site for at least most of May 2018. These concentrations, at a freezing temperature of -15 degrees C, were approximately one order of magnitude higher than predictions using a global chemical transport model that included low latitude natural dust sources, but not natural high latitude dust sources. ISSN:2634-3606 |
format |
Article in Journal/Newspaper |
author |
Xi, Yu Xu, Cuishan Downey, Arnold Stevens, Robin Bachelder, Jill id_orcid:0 000-0003-3787-1128 King, James Hayes, Patrick L. Bertram, Allan K. |
spellingShingle |
Xi, Yu Xu, Cuishan Downey, Arnold Stevens, Robin Bachelder, Jill id_orcid:0 000-0003-3787-1128 King, James Hayes, Patrick L. Bertram, Allan K. Ice nucleating properties of airborne dust from an actively retreating glacier in Yukon, Canada |
author_facet |
Xi, Yu Xu, Cuishan Downey, Arnold Stevens, Robin Bachelder, Jill id_orcid:0 000-0003-3787-1128 King, James Hayes, Patrick L. Bertram, Allan K. |
author_sort |
Xi, Yu |
title |
Ice nucleating properties of airborne dust from an actively retreating glacier in Yukon, Canada |
title_short |
Ice nucleating properties of airborne dust from an actively retreating glacier in Yukon, Canada |
title_full |
Ice nucleating properties of airborne dust from an actively retreating glacier in Yukon, Canada |
title_fullStr |
Ice nucleating properties of airborne dust from an actively retreating glacier in Yukon, Canada |
title_full_unstemmed |
Ice nucleating properties of airborne dust from an actively retreating glacier in Yukon, Canada |
title_sort |
ice nucleating properties of airborne dust from an actively retreating glacier in yukon, canada |
publisher |
Royal Society of Chemistry |
publishDate |
2022 |
url |
https://hdl.handle.net/20.500.11850/559647 https://doi.org/10.3929/ethz-b-000559647 |
geographic |
Canada Yukon |
geographic_facet |
Canada Yukon |
genre |
glacier* Yukon |
genre_facet |
glacier* Yukon |
op_source |
Environmental Science: Atmospheres, 2 (4) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1039/d1ea00101a info:eu-repo/semantics/altIdentifier/wos/000826368900001 http://hdl.handle.net/20.500.11850/559647 doi:10.3929/ethz-b-000559647 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc/3.0/ Creative Commons Attribution-NonCommercial 3.0 Unported |
op_doi |
https://doi.org/20.500.11850/55964710.3929/ethz-b-00055964710.1039/d1ea00101a |
_version_ |
1779314914867806208 |