The effect of (NH4)2SO4 on the freezing properties of non-mineral dust ice-nucleating substances of atmospheric relevance
A wide range of materials including mineral dust, soil dust, and bioaerosols have been shown to act as ice nuclei in the atmosphere. During atmospheric transport, these materials can become coated with inorganic and organic solutes which may impact their ability to nucleate ice. While a number of st...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00058301 2024-09-15T18:35:39+00:00 The effect of (NH4)2SO4 on the freezing properties of non-mineral dust ice-nucleating substances of atmospheric relevance Worthy, Soleil E. Kumar, Anand Xi, Yu Yun, Jingwei Chen, Jessie Xu, Cuishan Irish, Victoria E. Amato, Pierre Bertram, Allan K. 2021-10 electronic https://doi.org/10.5194/acp-21-14631-2021 https://noa.gwlb.de/receive/cop_mods_00058301 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00057951/acp-21-14631-2021.pdf https://acp.copernicus.org/articles/21/14631/2021/acp-21-14631-2021.pdf eng eng Copernicus Publications Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-21-14631-2021 https://noa.gwlb.de/receive/cop_mods_00058301 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00057951/acp-21-14631-2021.pdf https://acp.copernicus.org/articles/21/14631/2021/acp-21-14631-2021.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2021 ftnonlinearchiv https://doi.org/10.5194/acp-21-14631-2021 2024-06-26T04:36:34Z A wide range of materials including mineral dust, soil dust, and bioaerosols have been shown to act as ice nuclei in the atmosphere. During atmospheric transport, these materials can become coated with inorganic and organic solutes which may impact their ability to nucleate ice. While a number of studies have investigated the impact of solutes at low concentrations on ice nucleation by mineral dusts, very few studies have examined their impact on non-mineral dust ice nuclei. We studied the effect of dilute (NH4)2SO4 solutions (0.05 M) on immersion freezing of a variety of non-mineral dust ice-nucleating substances (INSs) including bacteria, fungi, sea ice diatom exudates, sea surface microlayer substances, and humic substances using the droplet-freezing technique. We also studied the effect of (NH4)2SO4 solutions (0.05 M) on the immersion freezing of several types of mineral dust particles for comparison purposes. (NH4)2SO4 had no effect on the median freezing temperature (ΔT50) of 9 of the 10 non-mineral dust materials tested. There was a small but statistically significant decrease in ΔT50 (−0.43 ± 0.19 ∘C) for the bacteria Xanthomonas campestris in the presence of (NH4)2SO4 compared to pure water. Conversely, (NH4)2SO4 increased the median freezing temperature of four different mineral dusts (potassium-rich feldspar, Arizona Test Dust, kaolinite, montmorillonite) by 3 to 9 ∘C and increased the ice nucleation active site density per gram of material (nm(T)) by a factor of ∼ 10 to ∼ 30. This significant difference in the response of mineral dust and non-mineral dust ice-nucleating substances when exposed to (NH4)2SO4 suggests that they nucleate ice and/or interact with (NH4)2SO4 via different mechanisms. This difference suggests that the relative importance of mineral dust to non-mineral dust particles for ice nucleation in mixed-phase clouds could potentially increase as these particles become coated with (NH4)2SO4 in the atmosphere. This difference also suggests that the addition of (NH4)2SO4 (0.05 M) to ... Article in Journal/Newspaper Sea ice Niedersächsisches Online-Archiv NOA Atmospheric Chemistry and Physics 21 19 14631 14648 |
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article Verlagsveröffentlichung Worthy, Soleil E. Kumar, Anand Xi, Yu Yun, Jingwei Chen, Jessie Xu, Cuishan Irish, Victoria E. Amato, Pierre Bertram, Allan K. The effect of (NH4)2SO4 on the freezing properties of non-mineral dust ice-nucleating substances of atmospheric relevance |
topic_facet |
article Verlagsveröffentlichung |
description |
A wide range of materials including mineral dust, soil dust, and bioaerosols have been shown to act as ice nuclei in the atmosphere. During atmospheric transport, these materials can become coated with inorganic and organic solutes which may impact their ability to nucleate ice. While a number of studies have investigated the impact of solutes at low concentrations on ice nucleation by mineral dusts, very few studies have examined their impact on non-mineral dust ice nuclei. We studied the effect of dilute (NH4)2SO4 solutions (0.05 M) on immersion freezing of a variety of non-mineral dust ice-nucleating substances (INSs) including bacteria, fungi, sea ice diatom exudates, sea surface microlayer substances, and humic substances using the droplet-freezing technique. We also studied the effect of (NH4)2SO4 solutions (0.05 M) on the immersion freezing of several types of mineral dust particles for comparison purposes. (NH4)2SO4 had no effect on the median freezing temperature (ΔT50) of 9 of the 10 non-mineral dust materials tested. There was a small but statistically significant decrease in ΔT50 (−0.43 ± 0.19 ∘C) for the bacteria Xanthomonas campestris in the presence of (NH4)2SO4 compared to pure water. Conversely, (NH4)2SO4 increased the median freezing temperature of four different mineral dusts (potassium-rich feldspar, Arizona Test Dust, kaolinite, montmorillonite) by 3 to 9 ∘C and increased the ice nucleation active site density per gram of material (nm(T)) by a factor of ∼ 10 to ∼ 30. This significant difference in the response of mineral dust and non-mineral dust ice-nucleating substances when exposed to (NH4)2SO4 suggests that they nucleate ice and/or interact with (NH4)2SO4 via different mechanisms. This difference suggests that the relative importance of mineral dust to non-mineral dust particles for ice nucleation in mixed-phase clouds could potentially increase as these particles become coated with (NH4)2SO4 in the atmosphere. This difference also suggests that the addition of (NH4)2SO4 (0.05 M) to ... |
format |
Article in Journal/Newspaper |
author |
Worthy, Soleil E. Kumar, Anand Xi, Yu Yun, Jingwei Chen, Jessie Xu, Cuishan Irish, Victoria E. Amato, Pierre Bertram, Allan K. |
author_facet |
Worthy, Soleil E. Kumar, Anand Xi, Yu Yun, Jingwei Chen, Jessie Xu, Cuishan Irish, Victoria E. Amato, Pierre Bertram, Allan K. |
author_sort |
Worthy, Soleil E. |
title |
The effect of (NH4)2SO4 on the freezing properties of non-mineral dust ice-nucleating substances of atmospheric relevance |
title_short |
The effect of (NH4)2SO4 on the freezing properties of non-mineral dust ice-nucleating substances of atmospheric relevance |
title_full |
The effect of (NH4)2SO4 on the freezing properties of non-mineral dust ice-nucleating substances of atmospheric relevance |
title_fullStr |
The effect of (NH4)2SO4 on the freezing properties of non-mineral dust ice-nucleating substances of atmospheric relevance |
title_full_unstemmed |
The effect of (NH4)2SO4 on the freezing properties of non-mineral dust ice-nucleating substances of atmospheric relevance |
title_sort |
effect of (nh4)2so4 on the freezing properties of non-mineral dust ice-nucleating substances of atmospheric relevance |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/acp-21-14631-2021 https://noa.gwlb.de/receive/cop_mods_00058301 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00057951/acp-21-14631-2021.pdf https://acp.copernicus.org/articles/21/14631/2021/acp-21-14631-2021.pdf |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-21-14631-2021 https://noa.gwlb.de/receive/cop_mods_00058301 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00057951/acp-21-14631-2021.pdf https://acp.copernicus.org/articles/21/14631/2021/acp-21-14631-2021.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/acp-21-14631-2021 |
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Atmospheric Chemistry and Physics |
container_volume |
21 |
container_issue |
19 |
container_start_page |
14631 |
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14648 |
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1810478849808400384 |