Temporal Trends in Deep Ocean Redfield Ratios
The Redfield ratio [carbon:nitrogen:phosphorus (C:N:P)] of particle flux to the deep ocean is a key factor in marine biogeochemical cycling. Changes in oceanic carbon sequestration have been linked to variations in the Redfield ratio on geological time scales, but this ratio generally is assumed to...
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Online Access: | http://dx.doi.org/10.1126/science.287.5454.831 https://www.science.org/doi/pdf/10.1126/science.287.5454.831 |
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craaas:10.1126/science.287.5454.831 2024-06-23T07:55:06+00:00 Temporal Trends in Deep Ocean Redfield Ratios Pahlow, Markus Riebesell, Ulf 2000 http://dx.doi.org/10.1126/science.287.5454.831 https://www.science.org/doi/pdf/10.1126/science.287.5454.831 en eng American Association for the Advancement of Science (AAAS) Science volume 287, issue 5454, page 831-833 ISSN 0036-8075 1095-9203 journal-article 2000 craaas https://doi.org/10.1126/science.287.5454.831 2024-06-13T04:01:14Z The Redfield ratio [carbon:nitrogen:phosphorus (C:N:P)] of particle flux to the deep ocean is a key factor in marine biogeochemical cycling. Changes in oceanic carbon sequestration have been linked to variations in the Redfield ratio on geological time scales, but this ratio generally is assumed to be constant with time in the modern ocean. However, deep-water Redfield ratios in the northern hemisphere show evidence for temporal trends over the past five decades. The North Atlantic Ocean exhibits a rising N:P ratio, which may be related to increased deposition of atmospheric nitrous oxides from anthropogenic N emissions. In the North Pacific Ocean, increasing C:N and C:P ratios are accompanied by rising remineralization rates, which suggests intensified export production. Stronger export of carbon in this region may be due to enhanced bioavailability of aeolian iron. These findings imply that the biological part of the marine carbon cycle currently is not in steady state. Article in Journal/Newspaper North Atlantic AAAS Resource Center (American Association for the Advancement of Science) Pacific Science 287 5454 831 833 |
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AAAS Resource Center (American Association for the Advancement of Science) |
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English |
description |
The Redfield ratio [carbon:nitrogen:phosphorus (C:N:P)] of particle flux to the deep ocean is a key factor in marine biogeochemical cycling. Changes in oceanic carbon sequestration have been linked to variations in the Redfield ratio on geological time scales, but this ratio generally is assumed to be constant with time in the modern ocean. However, deep-water Redfield ratios in the northern hemisphere show evidence for temporal trends over the past five decades. The North Atlantic Ocean exhibits a rising N:P ratio, which may be related to increased deposition of atmospheric nitrous oxides from anthropogenic N emissions. In the North Pacific Ocean, increasing C:N and C:P ratios are accompanied by rising remineralization rates, which suggests intensified export production. Stronger export of carbon in this region may be due to enhanced bioavailability of aeolian iron. These findings imply that the biological part of the marine carbon cycle currently is not in steady state. |
format |
Article in Journal/Newspaper |
author |
Pahlow, Markus Riebesell, Ulf |
spellingShingle |
Pahlow, Markus Riebesell, Ulf Temporal Trends in Deep Ocean Redfield Ratios |
author_facet |
Pahlow, Markus Riebesell, Ulf |
author_sort |
Pahlow, Markus |
title |
Temporal Trends in Deep Ocean Redfield Ratios |
title_short |
Temporal Trends in Deep Ocean Redfield Ratios |
title_full |
Temporal Trends in Deep Ocean Redfield Ratios |
title_fullStr |
Temporal Trends in Deep Ocean Redfield Ratios |
title_full_unstemmed |
Temporal Trends in Deep Ocean Redfield Ratios |
title_sort |
temporal trends in deep ocean redfield ratios |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2000 |
url |
http://dx.doi.org/10.1126/science.287.5454.831 https://www.science.org/doi/pdf/10.1126/science.287.5454.831 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Science volume 287, issue 5454, page 831-833 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.287.5454.831 |
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Science |
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287 |
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5454 |
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831 |
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833 |
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1802647530307059712 |