Significant continental source of ice-nucleating particles at the tip of Chile's southernmost Patagonia region
The sources and abundance of ice-nucleating particles (INPs) that initiate cloud ice formation remain understudied, especially in the Southern Hemisphere. In this study, we present INP measurements taken close to Punta Arenas, Chile, at the southernmost tip of South America from May 2019 to March 20...
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2022
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Online Access: | https://oa.tib.eu/renate/handle/123456789/11874 https://doi.org/10.34657/10907 |
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ftleibnizopen:oai:oai.leibnizopen.de:-iaOVYsBBwLIz6xGze6H 2023-11-12T04:26:36+01:00 Significant continental source of ice-nucleating particles at the tip of Chile's southernmost Patagonia region Gong, Xianda Radenz, Martin Wex, Heike Seifert, Patric Ataei, Farnoush Henning, Silvia Baars, Holger Barja, Boris Ansmann, Albert Stratmann, Frank 2022 application/pdf https://oa.tib.eu/renate/handle/123456789/11874 https://doi.org/10.34657/10907 eng eng Katlenburg-Lindau : EGU CC BY 4.0 Unported https://creativecommons.org/licenses/by/4.0 Atmospheric chemistry and physics 22 (2022), Nr. 16 Chile aerosol cloud classification cloud microphysics concentration (composition) 550 article Text 2022 ftleibnizopen https://doi.org/10.34657/10907 2023-10-22T23:17:27Z The sources and abundance of ice-nucleating particles (INPs) that initiate cloud ice formation remain understudied, especially in the Southern Hemisphere. In this study, we present INP measurements taken close to Punta Arenas, Chile, at the southernmost tip of South America from May 2019 to March 2020, during the Dynamics, Aerosol, Cloud, And Precipitation Observations in the Pristine Environment of the Southern Ocean (DACAPO-PESO) campaign. The highest ice nucleation temperature was observed at −3◦C, and from this temperature down to ∼ −10◦C, a sharp increase of INP number concentration (NINP) was observed. Heating of the samples revealed that roughly 90 % and 80 % of INPs are proteinaceous-based biogenic particles at > −10 and −15◦C, respectively. The NINP at Punta Arenas is much higher than that in the Southern Ocean, but it is comparable with an agricultural area in Argentina and forestry environment in the US. Ice active surface site density (ns) is much higher than that for marine aerosol in the Southern Ocean, but comparable to English fertile soil dust. Parameterization based on particle number concentration in the size range larger than 500 nm (N>500 nm) from the global average (DeMott et al., 2010) overestimates the measured INP, but the parameterization representing biological particles from a forestry environment (Tobo et al., 2013) yields NINP comparable to this study. No clear seasonal variation of NINP was observed. High precipitation is one of the most important meteorological parameters to enhance the NINP in both cold and warm seasons. A comparison of data from in situ and lidar measurements showed good agreement for concentrations of large aerosol particles (> 500 nm) when assuming continental conditions for retrieval of the lidar data, suggesting that these particles were well mixed within the planetary boundary layer (PBL). This corroborates the continental origin of these particles, consistent with the results from our INP source analysis. Overall, we suggest that a high NINP of ... Article in Journal/Newspaper Southern Ocean Unknown Southern Ocean Patagonia Argentina |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftleibnizopen |
language |
English |
topic |
Chile aerosol cloud classification cloud microphysics concentration (composition) 550 |
spellingShingle |
Chile aerosol cloud classification cloud microphysics concentration (composition) 550 Gong, Xianda Radenz, Martin Wex, Heike Seifert, Patric Ataei, Farnoush Henning, Silvia Baars, Holger Barja, Boris Ansmann, Albert Stratmann, Frank Significant continental source of ice-nucleating particles at the tip of Chile's southernmost Patagonia region |
topic_facet |
Chile aerosol cloud classification cloud microphysics concentration (composition) 550 |
description |
The sources and abundance of ice-nucleating particles (INPs) that initiate cloud ice formation remain understudied, especially in the Southern Hemisphere. In this study, we present INP measurements taken close to Punta Arenas, Chile, at the southernmost tip of South America from May 2019 to March 2020, during the Dynamics, Aerosol, Cloud, And Precipitation Observations in the Pristine Environment of the Southern Ocean (DACAPO-PESO) campaign. The highest ice nucleation temperature was observed at −3◦C, and from this temperature down to ∼ −10◦C, a sharp increase of INP number concentration (NINP) was observed. Heating of the samples revealed that roughly 90 % and 80 % of INPs are proteinaceous-based biogenic particles at > −10 and −15◦C, respectively. The NINP at Punta Arenas is much higher than that in the Southern Ocean, but it is comparable with an agricultural area in Argentina and forestry environment in the US. Ice active surface site density (ns) is much higher than that for marine aerosol in the Southern Ocean, but comparable to English fertile soil dust. Parameterization based on particle number concentration in the size range larger than 500 nm (N>500 nm) from the global average (DeMott et al., 2010) overestimates the measured INP, but the parameterization representing biological particles from a forestry environment (Tobo et al., 2013) yields NINP comparable to this study. No clear seasonal variation of NINP was observed. High precipitation is one of the most important meteorological parameters to enhance the NINP in both cold and warm seasons. A comparison of data from in situ and lidar measurements showed good agreement for concentrations of large aerosol particles (> 500 nm) when assuming continental conditions for retrieval of the lidar data, suggesting that these particles were well mixed within the planetary boundary layer (PBL). This corroborates the continental origin of these particles, consistent with the results from our INP source analysis. Overall, we suggest that a high NINP of ... |
format |
Article in Journal/Newspaper |
author |
Gong, Xianda Radenz, Martin Wex, Heike Seifert, Patric Ataei, Farnoush Henning, Silvia Baars, Holger Barja, Boris Ansmann, Albert Stratmann, Frank |
author_facet |
Gong, Xianda Radenz, Martin Wex, Heike Seifert, Patric Ataei, Farnoush Henning, Silvia Baars, Holger Barja, Boris Ansmann, Albert Stratmann, Frank |
author_sort |
Gong, Xianda |
title |
Significant continental source of ice-nucleating particles at the tip of Chile's southernmost Patagonia region |
title_short |
Significant continental source of ice-nucleating particles at the tip of Chile's southernmost Patagonia region |
title_full |
Significant continental source of ice-nucleating particles at the tip of Chile's southernmost Patagonia region |
title_fullStr |
Significant continental source of ice-nucleating particles at the tip of Chile's southernmost Patagonia region |
title_full_unstemmed |
Significant continental source of ice-nucleating particles at the tip of Chile's southernmost Patagonia region |
title_sort |
significant continental source of ice-nucleating particles at the tip of chile's southernmost patagonia region |
publisher |
Katlenburg-Lindau : EGU |
publishDate |
2022 |
url |
https://oa.tib.eu/renate/handle/123456789/11874 https://doi.org/10.34657/10907 |
geographic |
Southern Ocean Patagonia Argentina |
geographic_facet |
Southern Ocean Patagonia Argentina |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Atmospheric chemistry and physics 22 (2022), Nr. 16 |
op_rights |
CC BY 4.0 Unported https://creativecommons.org/licenses/by/4.0 |
op_doi |
https://doi.org/10.34657/10907 |
_version_ |
1782340518308478976 |