Aerosols as a source of dissolved black carbon to the ocean

Dissolved black carbon (DBC) is the largest known slow-cycling organic carbon pool in the world’s oceans. Atmospheric deposition could significantly contribute to the oceanic DBC pool, but respective information is lacking. Here we estimate that, during the dust outbreak season, the atmospheric dry...

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Autores principales: Bao, Hongyan, Niggemann, Jutta, Luo, Li, Dittmar, Thorsten, Kao, Shuh-Ji
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5593878/
https://www.ncbi.nlm.nih.gov/pubmed/28894096
http://dx.doi.org/10.1038/s41467-017-00437-3
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author Bao, Hongyan
Niggemann, Jutta
Luo, Li
Dittmar, Thorsten
Kao, Shuh-Ji
author_facet Bao, Hongyan
Niggemann, Jutta
Luo, Li
Dittmar, Thorsten
Kao, Shuh-Ji
author_sort Bao, Hongyan
collection PubMed
description Dissolved black carbon (DBC) is the largest known slow-cycling organic carbon pool in the world’s oceans. Atmospheric deposition could significantly contribute to the oceanic DBC pool, but respective information is lacking. Here we estimate that, during the dust outbreak season, the atmospheric dry deposition of water-soluble black carbon (WSBC) is ~ 40% of the riverine input to the China coastal seas. The molecular composition of atmospheric WSBC determined by ultrahigh-resolution mass spectrometry, reveals similar soil-derived sources as for riverine discharge. WSBC is significantly positively correlated with water-soluble organic carbon (WSOC) in marine aerosols, and water-soluble black carbon contributes on average 2.8 ± 0.65% to the total WSOC. Based on this relationship, the global atmospheric deposition of DBC to the ocean is estimated to be 1.8 ± 0.83 Tg yr(−1). Anticipated future changes in biomass burning and dust mobilization might increase these numbers, with consequences for regional ecosystems and global carbon reservoirs.
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spelling pubmed-55938782017-09-13 Aerosols as a source of dissolved black carbon to the ocean Bao, Hongyan Niggemann, Jutta Luo, Li Dittmar, Thorsten Kao, Shuh-Ji Nat Commun Article Dissolved black carbon (DBC) is the largest known slow-cycling organic carbon pool in the world’s oceans. Atmospheric deposition could significantly contribute to the oceanic DBC pool, but respective information is lacking. Here we estimate that, during the dust outbreak season, the atmospheric dry deposition of water-soluble black carbon (WSBC) is ~ 40% of the riverine input to the China coastal seas. The molecular composition of atmospheric WSBC determined by ultrahigh-resolution mass spectrometry, reveals similar soil-derived sources as for riverine discharge. WSBC is significantly positively correlated with water-soluble organic carbon (WSOC) in marine aerosols, and water-soluble black carbon contributes on average 2.8 ± 0.65% to the total WSOC. Based on this relationship, the global atmospheric deposition of DBC to the ocean is estimated to be 1.8 ± 0.83 Tg yr(−1). Anticipated future changes in biomass burning and dust mobilization might increase these numbers, with consequences for regional ecosystems and global carbon reservoirs. Nature Publishing Group UK 2017-09-11 /pmc/articles/PMC5593878/ /pubmed/28894096 http://dx.doi.org/10.1038/s41467-017-00437-3 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
Bao, Hongyan
Niggemann, Jutta
Luo, Li
Dittmar, Thorsten
Kao, Shuh-Ji
Aerosols as a source of dissolved black carbon to the ocean
title Aerosols as a source of dissolved black carbon to the ocean
title_full Aerosols as a source of dissolved black carbon to the ocean
title_fullStr Aerosols as a source of dissolved black carbon to the ocean
title_full_unstemmed Aerosols as a source of dissolved black carbon to the ocean
title_short Aerosols as a source of dissolved black carbon to the ocean
title_sort aerosols as a source of dissolved black carbon to the ocean
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5593878/
https://www.ncbi.nlm.nih.gov/pubmed/28894096
http://dx.doi.org/10.1038/s41467-017-00437-3
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