Balancing organic carbon supply and consumption in the ocean's interior: Evidence from repeated biogeochemical observations conducted in the subarctic and subtropical western North Pacific
Abstract The heterotrophic prokaryotic carbon demand (PCD) in the ocean's interior often substantially exceeds (by up to two orders of magnitude) the amount of organic carbon supplied by sinking particulate organic carbon (POC). A hypothesis to explain this carbon imbalance proposes that some n...
Published in: | Limnology and Oceanography |
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Online Access: | http://dx.doi.org/10.1002/lno.10821 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.10821 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.10821 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.10821 https://onlinelibrary.wiley.com/doi/am-pdf/10.1002%2Flno.10821 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.10821 |
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crwiley:10.1002/lno.10821 2024-06-09T07:49:50+00:00 Balancing organic carbon supply and consumption in the ocean's interior: Evidence from repeated biogeochemical observations conducted in the subarctic and subtropical western North Pacific Uchimiya, Mario Fukuda, Hideki Wakita, Masahide Kitamura, Minoru Kawakami, Hajime Honda, Makio C. Ogawa, Hiroshi Nagata, Toshi Japan Society for the Promotion of Science 2018 http://dx.doi.org/10.1002/lno.10821 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.10821 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.10821 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.10821 https://onlinelibrary.wiley.com/doi/am-pdf/10.1002%2Flno.10821 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.10821 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Limnology and Oceanography volume 63, issue 5, page 2015-2027 ISSN 0024-3590 1939-5590 journal-article 2018 crwiley https://doi.org/10.1002/lno.10821 2024-05-16T14:21:32Z Abstract The heterotrophic prokaryotic carbon demand (PCD) in the ocean's interior often substantially exceeds (by up to two orders of magnitude) the amount of organic carbon supplied by sinking particulate organic carbon (POC). A hypothesis to explain this carbon imbalance proposes that some non‐steady‐state processes have not been considered in previous studies based on snapshot data. To test this hypothesis, we collected time‐series (2.5 yr) data on sinking POC fluxes using moored sediment traps (trap deployment depths: 200 m, 500 m, and 4810 m) and compared them with the PCD data collected seasonally at two stations in the subarctic and subtropical western North Pacific. The POC supplies (ΔPOC) in the 200–500 m and 500–4810 m layers were estimated with a correction, when appropriate, for the non‐steady‐state effect arising from the change in the POC flux during the transit of POC between the upper and deeper traps. In the 200–500 m layer, ΔPOC generally exceeded or equaled PCD. In contrast, in the 500–4810 m layer, PCD generally exceeded ΔPOC by up to sevenfold. However, on a yearly basis, this carbon imbalance in the deeper layer decreased, with PCD balancing ΔPOC within a factor of 2. Therefore, the enigma of the high PCD relative to the POC flux in deep water is partially resolved by assuming a temporal uncoupling between supply and consumption, which partly equilibrates the carbon budget over a longer (yearly) time scale. Article in Journal/Newspaper Subarctic Wiley Online Library Pacific Limnology and Oceanography 63 5 2015 2027 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The heterotrophic prokaryotic carbon demand (PCD) in the ocean's interior often substantially exceeds (by up to two orders of magnitude) the amount of organic carbon supplied by sinking particulate organic carbon (POC). A hypothesis to explain this carbon imbalance proposes that some non‐steady‐state processes have not been considered in previous studies based on snapshot data. To test this hypothesis, we collected time‐series (2.5 yr) data on sinking POC fluxes using moored sediment traps (trap deployment depths: 200 m, 500 m, and 4810 m) and compared them with the PCD data collected seasonally at two stations in the subarctic and subtropical western North Pacific. The POC supplies (ΔPOC) in the 200–500 m and 500–4810 m layers were estimated with a correction, when appropriate, for the non‐steady‐state effect arising from the change in the POC flux during the transit of POC between the upper and deeper traps. In the 200–500 m layer, ΔPOC generally exceeded or equaled PCD. In contrast, in the 500–4810 m layer, PCD generally exceeded ΔPOC by up to sevenfold. However, on a yearly basis, this carbon imbalance in the deeper layer decreased, with PCD balancing ΔPOC within a factor of 2. Therefore, the enigma of the high PCD relative to the POC flux in deep water is partially resolved by assuming a temporal uncoupling between supply and consumption, which partly equilibrates the carbon budget over a longer (yearly) time scale. |
author2 |
Japan Society for the Promotion of Science |
format |
Article in Journal/Newspaper |
author |
Uchimiya, Mario Fukuda, Hideki Wakita, Masahide Kitamura, Minoru Kawakami, Hajime Honda, Makio C. Ogawa, Hiroshi Nagata, Toshi |
spellingShingle |
Uchimiya, Mario Fukuda, Hideki Wakita, Masahide Kitamura, Minoru Kawakami, Hajime Honda, Makio C. Ogawa, Hiroshi Nagata, Toshi Balancing organic carbon supply and consumption in the ocean's interior: Evidence from repeated biogeochemical observations conducted in the subarctic and subtropical western North Pacific |
author_facet |
Uchimiya, Mario Fukuda, Hideki Wakita, Masahide Kitamura, Minoru Kawakami, Hajime Honda, Makio C. Ogawa, Hiroshi Nagata, Toshi |
author_sort |
Uchimiya, Mario |
title |
Balancing organic carbon supply and consumption in the ocean's interior: Evidence from repeated biogeochemical observations conducted in the subarctic and subtropical western North Pacific |
title_short |
Balancing organic carbon supply and consumption in the ocean's interior: Evidence from repeated biogeochemical observations conducted in the subarctic and subtropical western North Pacific |
title_full |
Balancing organic carbon supply and consumption in the ocean's interior: Evidence from repeated biogeochemical observations conducted in the subarctic and subtropical western North Pacific |
title_fullStr |
Balancing organic carbon supply and consumption in the ocean's interior: Evidence from repeated biogeochemical observations conducted in the subarctic and subtropical western North Pacific |
title_full_unstemmed |
Balancing organic carbon supply and consumption in the ocean's interior: Evidence from repeated biogeochemical observations conducted in the subarctic and subtropical western North Pacific |
title_sort |
balancing organic carbon supply and consumption in the ocean's interior: evidence from repeated biogeochemical observations conducted in the subarctic and subtropical western north pacific |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1002/lno.10821 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.10821 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.10821 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.10821 https://onlinelibrary.wiley.com/doi/am-pdf/10.1002%2Flno.10821 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.10821 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Limnology and Oceanography volume 63, issue 5, page 2015-2027 ISSN 0024-3590 1939-5590 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/lno.10821 |
container_title |
Limnology and Oceanography |
container_volume |
63 |
container_issue |
5 |
container_start_page |
2015 |
op_container_end_page |
2027 |
_version_ |
1801382699969019904 |