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Evidence of a reduction in cloud condensation nuclei activity of water-soluble aerosols caused by biogenic emissions in a cool-temperate forest

Biogenic organic aerosols can affect cloud condensation nuclei (CCN) properties, and subsequently impact climate change. Large uncertainties exist in how the difference in the types of terrestrial biogenic sources and the abundance of organics relative to sulfate affect CCN properties. For the submi...

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Autores principales: Müller, Astrid, Miyazaki, Yuzo, Tachibana, Eri, Kawamura, Kimitaka, Hiura, Tsutom
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5559486/
https://www.ncbi.nlm.nih.gov/pubmed/28814722
http://dx.doi.org/10.1038/s41598-017-08112-9
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author Müller, Astrid
Miyazaki, Yuzo
Tachibana, Eri
Kawamura, Kimitaka
Hiura, Tsutom
author_facet Müller, Astrid
Miyazaki, Yuzo
Tachibana, Eri
Kawamura, Kimitaka
Hiura, Tsutom
author_sort Müller, Astrid
collection PubMed
description Biogenic organic aerosols can affect cloud condensation nuclei (CCN) properties, and subsequently impact climate change. Large uncertainties exist in how the difference in the types of terrestrial biogenic sources and the abundance of organics relative to sulfate affect CCN properties. For the submicron water-soluble aerosols collected for two years in a cool-temperate forest in northern Japan, we show that the hygroscopicity parameter κ(CCN) (0.44 ± 0.07) exhibited a distinct seasonal trend with a minimum in autumn (κ(CCN) = 0.32–0.37); these κ(CCN) values were generally larger than that of ambient particles, including water-insoluble fractions. The temporal variability of κ(CCN) was controlled by the water-soluble organic matter (WSOM)-to-sulfate ratio (R(2) > 0.60), where the significant reduction of κ(CCN) in autumn was linked to the increased WSOM/sulfate ratio. Positive matrix factorization analysis indicates that α-pinene-derived secondary organic aerosol (SOA) substantially contributed to the WSOM mass (~75%) in autumn, the majority of which was attributable to emissions from litter/soil microbial activity near the forest floor. These findings suggest that WSOM, most likely α-pinene SOA, originated from the forest floor can significantly suppress the aerosol CCN activity in cool-temperate forests, which have implications for predicting climate effects by changes in biogenic emissions in future.
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spelling pubmed-55594862017-08-18 Evidence of a reduction in cloud condensation nuclei activity of water-soluble aerosols caused by biogenic emissions in a cool-temperate forest Müller, Astrid Miyazaki, Yuzo Tachibana, Eri Kawamura, Kimitaka Hiura, Tsutom Sci Rep Article Biogenic organic aerosols can affect cloud condensation nuclei (CCN) properties, and subsequently impact climate change. Large uncertainties exist in how the difference in the types of terrestrial biogenic sources and the abundance of organics relative to sulfate affect CCN properties. For the submicron water-soluble aerosols collected for two years in a cool-temperate forest in northern Japan, we show that the hygroscopicity parameter κ(CCN) (0.44 ± 0.07) exhibited a distinct seasonal trend with a minimum in autumn (κ(CCN) = 0.32–0.37); these κ(CCN) values were generally larger than that of ambient particles, including water-insoluble fractions. The temporal variability of κ(CCN) was controlled by the water-soluble organic matter (WSOM)-to-sulfate ratio (R(2) > 0.60), where the significant reduction of κ(CCN) in autumn was linked to the increased WSOM/sulfate ratio. Positive matrix factorization analysis indicates that α-pinene-derived secondary organic aerosol (SOA) substantially contributed to the WSOM mass (~75%) in autumn, the majority of which was attributable to emissions from litter/soil microbial activity near the forest floor. These findings suggest that WSOM, most likely α-pinene SOA, originated from the forest floor can significantly suppress the aerosol CCN activity in cool-temperate forests, which have implications for predicting climate effects by changes in biogenic emissions in future. Nature Publishing Group UK 2017-08-16 /pmc/articles/PMC5559486/ /pubmed/28814722 http://dx.doi.org/10.1038/s41598-017-08112-9 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Müller, Astrid
Miyazaki, Yuzo
Tachibana, Eri
Kawamura, Kimitaka
Hiura, Tsutom
Evidence of a reduction in cloud condensation nuclei activity of water-soluble aerosols caused by biogenic emissions in a cool-temperate forest
title Evidence of a reduction in cloud condensation nuclei activity of water-soluble aerosols caused by biogenic emissions in a cool-temperate forest
title_full Evidence of a reduction in cloud condensation nuclei activity of water-soluble aerosols caused by biogenic emissions in a cool-temperate forest
title_fullStr Evidence of a reduction in cloud condensation nuclei activity of water-soluble aerosols caused by biogenic emissions in a cool-temperate forest
title_full_unstemmed Evidence of a reduction in cloud condensation nuclei activity of water-soluble aerosols caused by biogenic emissions in a cool-temperate forest
title_short Evidence of a reduction in cloud condensation nuclei activity of water-soluble aerosols caused by biogenic emissions in a cool-temperate forest
title_sort evidence of a reduction in cloud condensation nuclei activity of water-soluble aerosols caused by biogenic emissions in a cool-temperate forest
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5559486/
https://www.ncbi.nlm.nih.gov/pubmed/28814722
http://dx.doi.org/10.1038/s41598-017-08112-9
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