Nitrite Cycling in Warming Arctic and Subarctic Waters
Abstract The primary nitrite (NO2−) maximum (PNM) is a typical feature of oceanic nitrogen (N) cycle, yet its characterization in the world ocean remains a gap. By combining the natural abundance of NO2− isotopes with geochemical model, we report for the first time that the formation of Arctic and s...
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| Format: | Article |
| Language: | English |
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Wiley
2022-06-01
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| Series: | Geophysical Research Letters |
| Online Access: | https://doi.org/10.1029/2021GL096947 |
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| _version_ | 1832591267349921792 |
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| author | Yangjun Chen Min Chen |
| author_facet | Yangjun Chen Min Chen |
| author_sort | Yangjun Chen |
| collection | DOAJ |
| description | Abstract The primary nitrite (NO2−) maximum (PNM) is a typical feature of oceanic nitrogen (N) cycle, yet its characterization in the world ocean remains a gap. By combining the natural abundance of NO2− isotopes with geochemical model, we report for the first time that the formation of Arctic and subarctic PNMs is dominated by ammonia oxidation, while the oxidation of NO2− is the main sink. Notably, NO2− oxidation plays a more important role in Arctic and subarctic waters than in low‐ and mid‐latitude waters. The residence time of NO2− in the PNM further suggests that the NO2− cycle in the Arctic Ocean is more dynamic than in other marine ecosystems. Our findings provide insights into N cycle dynamics in the upper Arctic Ocean ecosystem. |
| format | Article |
| id | doaj-art-d9c7de1e539a47c082b4324e0ea25421 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2022-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-d9c7de1e539a47c082b4324e0ea254212025-01-22T14:38:16ZengWileyGeophysical Research Letters0094-82761944-80072022-06-014912n/an/a10.1029/2021GL096947Nitrite Cycling in Warming Arctic and Subarctic WatersYangjun Chen0Min Chen1College of Ocean and Earth Sciences Xiamen University Xiamen ChinaCollege of Ocean and Earth Sciences Xiamen University Xiamen ChinaAbstract The primary nitrite (NO2−) maximum (PNM) is a typical feature of oceanic nitrogen (N) cycle, yet its characterization in the world ocean remains a gap. By combining the natural abundance of NO2− isotopes with geochemical model, we report for the first time that the formation of Arctic and subarctic PNMs is dominated by ammonia oxidation, while the oxidation of NO2− is the main sink. Notably, NO2− oxidation plays a more important role in Arctic and subarctic waters than in low‐ and mid‐latitude waters. The residence time of NO2− in the PNM further suggests that the NO2− cycle in the Arctic Ocean is more dynamic than in other marine ecosystems. Our findings provide insights into N cycle dynamics in the upper Arctic Ocean ecosystem.https://doi.org/10.1029/2021GL096947 |
| spellingShingle | Yangjun Chen Min Chen Nitrite Cycling in Warming Arctic and Subarctic Waters Geophysical Research Letters |
| title | Nitrite Cycling in Warming Arctic and Subarctic Waters |
| title_full | Nitrite Cycling in Warming Arctic and Subarctic Waters |
| title_fullStr | Nitrite Cycling in Warming Arctic and Subarctic Waters |
| title_full_unstemmed | Nitrite Cycling in Warming Arctic and Subarctic Waters |
| title_short | Nitrite Cycling in Warming Arctic and Subarctic Waters |
| title_sort | nitrite cycling in warming arctic and subarctic waters |
| url | https://doi.org/10.1029/2021GL096947 |
| work_keys_str_mv | AT yangjunchen nitritecyclinginwarmingarcticandsubarcticwaters AT minchen nitritecyclinginwarmingarcticandsubarcticwaters |