Chemical composition, source characteristics, and hygroscopic properties of organic-enriched aerosols in the high Arctic during summer.
Arctic regions are extremely sensitive to global warming. Aerosols are one of the most important short-lived climate-forcing agents affecting the Arctic climate. The present study examines the summertime chemical characteristics and potential sources of various organic and inorganic aerosols at a No...
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ftpubmed:38844230 2024-06-23T07:49:14+00:00 Chemical composition, source characteristics, and hygroscopic properties of organic-enriched aerosols in the high Arctic during summer. Boreddy, Suresh K R Gogoi, Mukunda M Hegde, Prashant Suresh Babu, S 2024 Jun 04 https://doi.org/10.1016/j.scitotenv.2024.173780 https://pubmed.ncbi.nlm.nih.gov/38844230 eng eng Elsevier Science https://doi.org/10.1016/j.scitotenv.2024.173780 https://pubmed.ncbi.nlm.nih.gov/38844230 Copyright © 2024 Elsevier B.V. All rights reserved. Sci Total Environ ISSN:1879-1026 Volume:942 Hierarchical Cluster Analysis Hygroscopicity Marine and non-marine sources Ny-Ålesund Organic aerosols Summer Journal Article 2024 ftpubmed https://doi.org/10.1016/j.scitotenv.2024.173780 2024-06-13T16:02:00Z Arctic regions are extremely sensitive to global warming. Aerosols are one of the most important short-lived climate-forcing agents affecting the Arctic climate. The present study examines the summertime chemical characteristics and potential sources of various organic and inorganic aerosols at a Norwegian Arctic site, Ny-Ålesund (79°N). The results show that organic matter (OM) accounts for 60 % of the total PM10 mass, followed by sulfate (SO42-). Water-soluble organic carbon (WSOC) contributes 62 % of OC. Photochemical processes involving diverse anthropogenic and biogenic precursor compounds are identified as the major sources of WSOC, while water-insoluble organic carbon (WIOC) aerosols are predominantly linked to primary marine emissions. Despite being a remote pristine site, the aerosols show a sign of chemical aging, evidenced by a significant chloride depletion, which was about 82 % on average during the study period. Nitrogen-containing aerosols are likely stemming from migratory seabird colonies and local dust sources around the sampling site. While biogenic, crustal, and sea salt-derived SO42- account for 37%, 8%, and 5% respectively, the remaining 50% is attributed to anthropogenic SO42-. Through chemical tracers, Pearson correlation coefficient matrix, and Hierarchical Cluster Analysis (HCA), the present study identifies soil biota (terrestrial biogenic) and marine emissions, along with their photochemical oxidation processes, as potential sources of Arctic aerosols during summer, while biomass burning and combustion-related sources have a minor contribution. The chemical closure of hygroscopicity highlights that while organics predominantly control aerosol hygroscopicity in the Arctic summer, specific inorganic components like (NH4)2SO4 can significantly increase it on certain days, affecting aerosol-cloud interactions and climate processes over the Arctic during summer. The present study highlights the high abundance of organics and their vital role in the Arctic climate during summer when natural aerosols are conquered. Article in Journal/Newspaper Arctic Global warming Ny Ålesund Ny-Ålesund PubMed Central (PMC) Arctic Ny-Ålesund Science of The Total Environment 942 173780 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Hierarchical Cluster Analysis Hygroscopicity Marine and non-marine sources Ny-Ålesund Organic aerosols Summer |
spellingShingle |
Hierarchical Cluster Analysis Hygroscopicity Marine and non-marine sources Ny-Ålesund Organic aerosols Summer Boreddy, Suresh K R Gogoi, Mukunda M Hegde, Prashant Suresh Babu, S Chemical composition, source characteristics, and hygroscopic properties of organic-enriched aerosols in the high Arctic during summer. |
topic_facet |
Hierarchical Cluster Analysis Hygroscopicity Marine and non-marine sources Ny-Ålesund Organic aerosols Summer |
description |
Arctic regions are extremely sensitive to global warming. Aerosols are one of the most important short-lived climate-forcing agents affecting the Arctic climate. The present study examines the summertime chemical characteristics and potential sources of various organic and inorganic aerosols at a Norwegian Arctic site, Ny-Ålesund (79°N). The results show that organic matter (OM) accounts for 60 % of the total PM10 mass, followed by sulfate (SO42-). Water-soluble organic carbon (WSOC) contributes 62 % of OC. Photochemical processes involving diverse anthropogenic and biogenic precursor compounds are identified as the major sources of WSOC, while water-insoluble organic carbon (WIOC) aerosols are predominantly linked to primary marine emissions. Despite being a remote pristine site, the aerosols show a sign of chemical aging, evidenced by a significant chloride depletion, which was about 82 % on average during the study period. Nitrogen-containing aerosols are likely stemming from migratory seabird colonies and local dust sources around the sampling site. While biogenic, crustal, and sea salt-derived SO42- account for 37%, 8%, and 5% respectively, the remaining 50% is attributed to anthropogenic SO42-. Through chemical tracers, Pearson correlation coefficient matrix, and Hierarchical Cluster Analysis (HCA), the present study identifies soil biota (terrestrial biogenic) and marine emissions, along with their photochemical oxidation processes, as potential sources of Arctic aerosols during summer, while biomass burning and combustion-related sources have a minor contribution. The chemical closure of hygroscopicity highlights that while organics predominantly control aerosol hygroscopicity in the Arctic summer, specific inorganic components like (NH4)2SO4 can significantly increase it on certain days, affecting aerosol-cloud interactions and climate processes over the Arctic during summer. The present study highlights the high abundance of organics and their vital role in the Arctic climate during summer when natural aerosols are conquered. |
format |
Article in Journal/Newspaper |
author |
Boreddy, Suresh K R Gogoi, Mukunda M Hegde, Prashant Suresh Babu, S |
author_facet |
Boreddy, Suresh K R Gogoi, Mukunda M Hegde, Prashant Suresh Babu, S |
author_sort |
Boreddy, Suresh K R |
title |
Chemical composition, source characteristics, and hygroscopic properties of organic-enriched aerosols in the high Arctic during summer. |
title_short |
Chemical composition, source characteristics, and hygroscopic properties of organic-enriched aerosols in the high Arctic during summer. |
title_full |
Chemical composition, source characteristics, and hygroscopic properties of organic-enriched aerosols in the high Arctic during summer. |
title_fullStr |
Chemical composition, source characteristics, and hygroscopic properties of organic-enriched aerosols in the high Arctic during summer. |
title_full_unstemmed |
Chemical composition, source characteristics, and hygroscopic properties of organic-enriched aerosols in the high Arctic during summer. |
title_sort |
chemical composition, source characteristics, and hygroscopic properties of organic-enriched aerosols in the high arctic during summer. |
publisher |
Elsevier Science |
publishDate |
2024 |
url |
https://doi.org/10.1016/j.scitotenv.2024.173780 https://pubmed.ncbi.nlm.nih.gov/38844230 |
geographic |
Arctic Ny-Ålesund |
geographic_facet |
Arctic Ny-Ålesund |
genre |
Arctic Global warming Ny Ålesund Ny-Ålesund |
genre_facet |
Arctic Global warming Ny Ålesund Ny-Ålesund |
op_source |
Sci Total Environ ISSN:1879-1026 Volume:942 |
op_relation |
https://doi.org/10.1016/j.scitotenv.2024.173780 https://pubmed.ncbi.nlm.nih.gov/38844230 |
op_rights |
Copyright © 2024 Elsevier B.V. All rights reserved. |
op_doi |
https://doi.org/10.1016/j.scitotenv.2024.173780 |
container_title |
Science of The Total Environment |
container_volume |
942 |
container_start_page |
173780 |
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1802639540892991488 |