Distribution and Sources of Dissolved Black Carbon in Surface Waters of the Chukchi Sea, Bering Sea, and the North Pacific Ocean
Pyrogenic carbon, also called black carbon (BC), is an important component in the global carbon cycle. BC produced by biomass burning or fossil fuel combustion is transported to oceans by the atmosphere or rivers. However, environmental dynamics (i.e., major sources and sinks) of BC in marine enviro...
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ftdoajarticles:oai:doaj.org/article:d74a8ab2b39842b88aca4a5c4a3bda77 2023-05-15T15:18:29+02:00 Distribution and Sources of Dissolved Black Carbon in Surface Waters of the Chukchi Sea, Bering Sea, and the North Pacific Ocean Motohiro Nakane Taku Ajioka Youhei Yamashita 2017-05-01T00:00:00Z https://doi.org/10.3389/feart.2017.00034 https://doaj.org/article/d74a8ab2b39842b88aca4a5c4a3bda77 EN eng Frontiers Media S.A. http://journal.frontiersin.org/article/10.3389/feart.2017.00034/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2017.00034 https://doaj.org/article/d74a8ab2b39842b88aca4a5c4a3bda77 Frontiers in Earth Science, Vol 5 (2017) pyrogenic carbon dissolved black carbon surface waters Chukchi Sea Bering Sea North Pacific Science Q article 2017 ftdoajarticles https://doi.org/10.3389/feart.2017.00034 2022-12-31T12:54:35Z Pyrogenic carbon, also called black carbon (BC), is an important component in the global carbon cycle. BC produced by biomass burning or fossil fuel combustion is transported to oceans by the atmosphere or rivers. However, environmental dynamics (i.e., major sources and sinks) of BC in marine environments have not been well-documented. In this study, dissolved BC (DBC) collected from surface waters of the Chukchi Sea, the Bering Sea, and the subarctic and subtropical North Pacific were analyzed using the benzene polycarboxylic acid (BPCA) method. The DBC concentration and the ratio of B5CA and B6CA to all BPCAs (an index of the DBC condensation degree) ranged from 4.8 to 15.5 μg-C L−1 and from 0.20 to 0.43, respectively, in surface waters of the Chukchi/Bering Seas and the North Pacific Ocean. The concentration and condensation degree of DBC in the Chukchi/Bering Seas were higher and more variable than those in the subarctic and subtropical North Pacific, which implies that the major factors controlling DBC distribution were different in these marine provinces. In the Chukchi/Bering Seas, the DBC concentration was negatively correlated to salinity but positively correlated to chromophoric dissolved organic matter (CDOM) quantity and total dissolved lignin phenol concentration estimated by CDOM parameters. These correlations indicated that the possible major source of DBC in the Chukchi/Bering Seas was Arctic rivers. However, in the North Pacific, where riverine inputs are negligible for most sampling sites, DBC was possibly derived from the atmosphere. Although spectral slopes of CDOM at 275–295 nm (an index of the photodegradation degree of CDOM) differed widely between the subarctic and subtropical North Pacific, the concentration and condensation degrees of DBC were similar between the subarctic and subtropical North Pacific, which suggests that photodegradation was not the only major factor controlling DBC distribution. Therefore, DBC distributions of the North Pacific Ocean were considered to be mainly ... Article in Journal/Newspaper Arctic Bering Sea black carbon Chukchi Chukchi Sea Subarctic Directory of Open Access Journals: DOAJ Articles Arctic Bering Sea Chukchi Sea Pacific Frontiers in Earth Science 5 |
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Open Polar |
collection |
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op_collection_id |
ftdoajarticles |
language |
English |
topic |
pyrogenic carbon dissolved black carbon surface waters Chukchi Sea Bering Sea North Pacific Science Q |
spellingShingle |
pyrogenic carbon dissolved black carbon surface waters Chukchi Sea Bering Sea North Pacific Science Q Motohiro Nakane Taku Ajioka Youhei Yamashita Distribution and Sources of Dissolved Black Carbon in Surface Waters of the Chukchi Sea, Bering Sea, and the North Pacific Ocean |
topic_facet |
pyrogenic carbon dissolved black carbon surface waters Chukchi Sea Bering Sea North Pacific Science Q |
description |
Pyrogenic carbon, also called black carbon (BC), is an important component in the global carbon cycle. BC produced by biomass burning or fossil fuel combustion is transported to oceans by the atmosphere or rivers. However, environmental dynamics (i.e., major sources and sinks) of BC in marine environments have not been well-documented. In this study, dissolved BC (DBC) collected from surface waters of the Chukchi Sea, the Bering Sea, and the subarctic and subtropical North Pacific were analyzed using the benzene polycarboxylic acid (BPCA) method. The DBC concentration and the ratio of B5CA and B6CA to all BPCAs (an index of the DBC condensation degree) ranged from 4.8 to 15.5 μg-C L−1 and from 0.20 to 0.43, respectively, in surface waters of the Chukchi/Bering Seas and the North Pacific Ocean. The concentration and condensation degree of DBC in the Chukchi/Bering Seas were higher and more variable than those in the subarctic and subtropical North Pacific, which implies that the major factors controlling DBC distribution were different in these marine provinces. In the Chukchi/Bering Seas, the DBC concentration was negatively correlated to salinity but positively correlated to chromophoric dissolved organic matter (CDOM) quantity and total dissolved lignin phenol concentration estimated by CDOM parameters. These correlations indicated that the possible major source of DBC in the Chukchi/Bering Seas was Arctic rivers. However, in the North Pacific, where riverine inputs are negligible for most sampling sites, DBC was possibly derived from the atmosphere. Although spectral slopes of CDOM at 275–295 nm (an index of the photodegradation degree of CDOM) differed widely between the subarctic and subtropical North Pacific, the concentration and condensation degrees of DBC were similar between the subarctic and subtropical North Pacific, which suggests that photodegradation was not the only major factor controlling DBC distribution. Therefore, DBC distributions of the North Pacific Ocean were considered to be mainly ... |
format |
Article in Journal/Newspaper |
author |
Motohiro Nakane Taku Ajioka Youhei Yamashita |
author_facet |
Motohiro Nakane Taku Ajioka Youhei Yamashita |
author_sort |
Motohiro Nakane |
title |
Distribution and Sources of Dissolved Black Carbon in Surface Waters of the Chukchi Sea, Bering Sea, and the North Pacific Ocean |
title_short |
Distribution and Sources of Dissolved Black Carbon in Surface Waters of the Chukchi Sea, Bering Sea, and the North Pacific Ocean |
title_full |
Distribution and Sources of Dissolved Black Carbon in Surface Waters of the Chukchi Sea, Bering Sea, and the North Pacific Ocean |
title_fullStr |
Distribution and Sources of Dissolved Black Carbon in Surface Waters of the Chukchi Sea, Bering Sea, and the North Pacific Ocean |
title_full_unstemmed |
Distribution and Sources of Dissolved Black Carbon in Surface Waters of the Chukchi Sea, Bering Sea, and the North Pacific Ocean |
title_sort |
distribution and sources of dissolved black carbon in surface waters of the chukchi sea, bering sea, and the north pacific ocean |
publisher |
Frontiers Media S.A. |
publishDate |
2017 |
url |
https://doi.org/10.3389/feart.2017.00034 https://doaj.org/article/d74a8ab2b39842b88aca4a5c4a3bda77 |
geographic |
Arctic Bering Sea Chukchi Sea Pacific |
geographic_facet |
Arctic Bering Sea Chukchi Sea Pacific |
genre |
Arctic Bering Sea black carbon Chukchi Chukchi Sea Subarctic |
genre_facet |
Arctic Bering Sea black carbon Chukchi Chukchi Sea Subarctic |
op_source |
Frontiers in Earth Science, Vol 5 (2017) |
op_relation |
http://journal.frontiersin.org/article/10.3389/feart.2017.00034/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2017.00034 https://doaj.org/article/d74a8ab2b39842b88aca4a5c4a3bda77 |
op_doi |
https://doi.org/10.3389/feart.2017.00034 |
container_title |
Frontiers in Earth Science |
container_volume |
5 |
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1766348686790492160 |