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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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/303836 2023-05-15T15:13:04+02:00 Ice-nucleating ability of aerosol particles and possible sources at three coastal marine sites Si, Meng Irish, Victoria E. Mason, Ryan H. Vergara Temprado, Jesus Hanna, Sarah J. Ladino, Luis A. Yakobi-Hancock, Jacqueline D. Schiller, Corinne L. Wentzell, Jeremy J.B. Abbatt, Jonathan P.D. Carslaw, Ken S. Murray, Benjamin J. Bertram, Allan K. 2018 application/application/pdf https://hdl.handle.net/20.500.11850/303836 https://doi.org/10.3929/ethz-b-000303836 en eng Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-18-15669-2018 info:eu-repo/semantics/altIdentifier/wos/000449028500001 http://hdl.handle.net/20.500.11850/303836 doi:10.3929/ethz-b-000303836 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International CC-BY Atmospheric Chemistry and Physics, 18 (21) info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftethz https://doi.org/20.500.11850/303836 https://doi.org/10.3929/ethz-b-000303836 https://doi.org/10.5194/acp-18-15669-2018 2023-02-13T00:46:09Z 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 0.2µm, approximately 1 in 106 particles acted as an INP at −25°C, while at diameters of around 8µm, 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, ns) was also dependent on the particle size, with larger particles being more efficient at nucleating ice. The ns values of supermicron particles at Amphitrite Point and Labrador Sea were larger than previously measured ns 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. ISSN:1680-7375 ISSN:1680-7367 Article in Journal/Newspaper Arctic Labrador Sea Lancaster Sound ETH Zürich Research Collection Arctic Canada Lancaster Sound ENVELOPE(-83.999,-83.999,74.218,74.218) |
institution |
Open Polar |
collection |
ETH Zürich Research Collection |
op_collection_id |
ftethz |
language |
English |
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 0.2µm, approximately 1 in 106 particles acted as an INP at −25°C, while at diameters of around 8µm, 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, ns) was also dependent on the particle size, with larger particles being more efficient at nucleating ice. The ns values of supermicron particles at Amphitrite Point and Labrador Sea were larger than previously measured ns 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. ISSN:1680-7375 ISSN:1680-7367 |
format |
Article in Journal/Newspaper |
author |
Si, Meng Irish, Victoria E. Mason, Ryan H. Vergara Temprado, Jesus Hanna, Sarah J. Ladino, Luis A. Yakobi-Hancock, Jacqueline D. Schiller, Corinne L. Wentzell, Jeremy J.B. Abbatt, Jonathan P.D. Carslaw, Ken S. Murray, Benjamin J. Bertram, Allan K. |
spellingShingle |
Si, Meng Irish, Victoria E. Mason, Ryan H. Vergara Temprado, Jesus Hanna, Sarah J. Ladino, Luis A. Yakobi-Hancock, Jacqueline D. Schiller, Corinne L. Wentzell, Jeremy J.B. Abbatt, Jonathan P.D. Carslaw, Ken S. Murray, Benjamin J. Bertram, Allan K. Ice-nucleating ability of aerosol particles and possible sources at three coastal marine sites |
author_facet |
Si, Meng Irish, Victoria E. Mason, Ryan H. Vergara Temprado, Jesus Hanna, Sarah J. Ladino, Luis A. Yakobi-Hancock, Jacqueline D. Schiller, Corinne L. Wentzell, Jeremy J.B. Abbatt, Jonathan P.D. Carslaw, Ken S. Murray, Benjamin J. Bertram, Allan K. |
author_sort |
Si, Meng |
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 |
publishDate |
2018 |
url |
https://hdl.handle.net/20.500.11850/303836 https://doi.org/10.3929/ethz-b-000303836 |
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, 18 (21) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-18-15669-2018 info:eu-repo/semantics/altIdentifier/wos/000449028500001 http://hdl.handle.net/20.500.11850/303836 doi:10.3929/ethz-b-000303836 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/20.500.11850/303836 https://doi.org/10.3929/ethz-b-000303836 https://doi.org/10.5194/acp-18-15669-2018 |
_version_ |
1766343673080971264 |