Ice-nucleating ability of aerosol particles and possible sources at three coastal marine sites
Despite the importance of ice-nucleating particles (INPs) for climate and precipitation, our understanding of these particles is far from complete. Here, we investigated INPs at three coastal marine sites in Canada, two at mid-latitude (Amphitrite Point and Labrador Sea) and one in the Arctic (Lanca...
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Online Access: | https://doi.org/10.5194/acp-18-15669-2018 https://doaj.org/article/ea58c391b1d74b4798fd6a07a822d26f |
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ftdoajarticles:oai:doaj.org/article:ea58c391b1d74b4798fd6a07a822d26f 2023-05-15T15:16:23+02:00 Ice-nucleating ability of aerosol particles and possible sources at three coastal marine sites M. Si V. E. Irish R. H. Mason J. Vergara-Temprado S. J. Hanna L. A. Ladino J. D. Yakobi-Hancock C. L. Schiller J. J. B. Wentzell J. P. D. Abbatt K. S. Carslaw B. J. Murray A. K. Bertram 2018-11-01T00:00:00Z https://doi.org/10.5194/acp-18-15669-2018 https://doaj.org/article/ea58c391b1d74b4798fd6a07a822d26f EN eng Copernicus Publications https://www.atmos-chem-phys.net/18/15669/2018/acp-18-15669-2018.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-18-15669-2018 1680-7316 1680-7324 https://doaj.org/article/ea58c391b1d74b4798fd6a07a822d26f Atmospheric Chemistry and Physics, Vol 18, Pp 15669-15685 (2018) Physics QC1-999 Chemistry QD1-999 article 2018 ftdoajarticles https://doi.org/10.5194/acp-18-15669-2018 2022-12-31T14:03:57Z Despite the importance of ice-nucleating particles (INPs) for climate and precipitation, our understanding of these particles is far from complete. Here, we investigated INPs at three coastal marine sites in Canada, two at mid-latitude (Amphitrite Point and Labrador Sea) and one in the Arctic (Lancaster Sound). For Amphitrite Point, 23 sets of samples were analyzed, and for Labrador Sea and Lancaster Sound, one set of samples was analyzed for each location. At all three sites, the ice-nucleating ability on a per number basis (expressed as the fraction of aerosol particles acting as an INP) was strongly dependent on the particle size. For example, at diameters of around 0.2 µm, approximately 1 in 10 6 particles acted as an INP at −25 °C, while at diameters of around 8 µm, approximately 1 in 10 particles acted as an INP at −25 °C. The ice-nucleating ability on a per surface-area basis (expressed as the surface active site density, n s ) was also dependent on the particle size, with larger particles being more efficient at nucleating ice. The n s values of supermicron particles at Amphitrite Point and Labrador Sea were larger than previously measured n s values of sea spray aerosols, suggesting that sea spray aerosols were not a major contributor to the supermicron INP population at these two sites. Consistent with this observation, a global model of INP concentrations under-predicted the INP concentrations when assuming only marine organics as INPs. On the other hand, assuming only K-feldspar as INPs, the same model was able to reproduce the measurements at a freezing temperature of −25 °C, but under-predicted INP concentrations at −15 °C, suggesting that the model is missing a source of INPs active at a freezing temperature of −15 °C. Article in Journal/Newspaper Arctic Labrador Sea Lancaster Sound Directory of Open Access Journals: DOAJ Articles Arctic Canada Lancaster Sound ENVELOPE(-83.999,-83.999,74.218,74.218) Atmospheric Chemistry and Physics 18 21 15669 15685 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 M. Si V. E. Irish R. H. Mason J. Vergara-Temprado S. J. Hanna L. A. Ladino J. D. Yakobi-Hancock C. L. Schiller J. J. B. Wentzell J. P. D. Abbatt K. S. Carslaw B. J. Murray A. K. Bertram Ice-nucleating ability of aerosol particles and possible sources at three coastal marine sites |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
Despite the importance of ice-nucleating particles (INPs) for climate and precipitation, our understanding of these particles is far from complete. Here, we investigated INPs at three coastal marine sites in Canada, two at mid-latitude (Amphitrite Point and Labrador Sea) and one in the Arctic (Lancaster Sound). For Amphitrite Point, 23 sets of samples were analyzed, and for Labrador Sea and Lancaster Sound, one set of samples was analyzed for each location. At all three sites, the ice-nucleating ability on a per number basis (expressed as the fraction of aerosol particles acting as an INP) was strongly dependent on the particle size. For example, at diameters of around 0.2 µm, approximately 1 in 10 6 particles acted as an INP at −25 °C, while at diameters of around 8 µm, approximately 1 in 10 particles acted as an INP at −25 °C. The ice-nucleating ability on a per surface-area basis (expressed as the surface active site density, n s ) was also dependent on the particle size, with larger particles being more efficient at nucleating ice. The n s values of supermicron particles at Amphitrite Point and Labrador Sea were larger than previously measured n s values of sea spray aerosols, suggesting that sea spray aerosols were not a major contributor to the supermicron INP population at these two sites. Consistent with this observation, a global model of INP concentrations under-predicted the INP concentrations when assuming only marine organics as INPs. On the other hand, assuming only K-feldspar as INPs, the same model was able to reproduce the measurements at a freezing temperature of −25 °C, but under-predicted INP concentrations at −15 °C, suggesting that the model is missing a source of INPs active at a freezing temperature of −15 °C. |
format |
Article in Journal/Newspaper |
author |
M. Si V. E. Irish R. H. Mason J. Vergara-Temprado S. J. Hanna L. A. Ladino J. D. Yakobi-Hancock C. L. Schiller J. J. B. Wentzell J. P. D. Abbatt K. S. Carslaw B. J. Murray A. K. Bertram |
author_facet |
M. Si V. E. Irish R. H. Mason J. Vergara-Temprado S. J. Hanna L. A. Ladino J. D. Yakobi-Hancock C. L. Schiller J. J. B. Wentzell J. P. D. Abbatt K. S. Carslaw B. J. Murray A. K. Bertram |
author_sort |
M. Si |
title |
Ice-nucleating ability of aerosol particles and possible sources at three coastal marine sites |
title_short |
Ice-nucleating ability of aerosol particles and possible sources at three coastal marine sites |
title_full |
Ice-nucleating ability of aerosol particles and possible sources at three coastal marine sites |
title_fullStr |
Ice-nucleating ability of aerosol particles and possible sources at three coastal marine sites |
title_full_unstemmed |
Ice-nucleating ability of aerosol particles and possible sources at three coastal marine sites |
title_sort |
ice-nucleating ability of aerosol particles and possible sources at three coastal marine sites |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/acp-18-15669-2018 https://doaj.org/article/ea58c391b1d74b4798fd6a07a822d26f |
long_lat |
ENVELOPE(-83.999,-83.999,74.218,74.218) |
geographic |
Arctic Canada Lancaster Sound |
geographic_facet |
Arctic Canada Lancaster Sound |
genre |
Arctic Labrador Sea Lancaster Sound |
genre_facet |
Arctic Labrador Sea Lancaster Sound |
op_source |
Atmospheric Chemistry and Physics, Vol 18, Pp 15669-15685 (2018) |
op_relation |
https://www.atmos-chem-phys.net/18/15669/2018/acp-18-15669-2018.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-18-15669-2018 1680-7316 1680-7324 https://doaj.org/article/ea58c391b1d74b4798fd6a07a822d26f |
op_doi |
https://doi.org/10.5194/acp-18-15669-2018 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
18 |
container_issue |
21 |
container_start_page |
15669 |
op_container_end_page |
15685 |
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