Water column biogeochemistry of oxygen minimum zones in the eastern tropical North Atlantic and eastern tropical South Pacific oceans
Recent modeling results suggest that oceanic oxygen levels will decrease significantly over the next decades to centuries in response to climate change and altered ocean circulation. Hence, the future ocean may experience major shifts in nutrient cycling triggered by the expansion and intensificatio...
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ftcopernicus:oai:publications.copernicus.org:bg28797 2023-05-15T17:30:51+02:00 Water column biogeochemistry of oxygen minimum zones in the eastern tropical North Atlantic and eastern tropical South Pacific oceans Löscher, Carolin R. Bange, Hermann W. Schmitz, Ruth A. Callbeck, Cameron M. Engel, Anja Hauss, Helena Kanzow, Torsten Kiko, Rainer Lavik, Gaute Loginova, Alexandra Melzner, Frank Meyer, Judith Neulinger, Sven C. Pahlow, Markus Riebesell, Ulf Schunck, Harald Thomsen, Sören Wagner, Hannes 2018-09-27 application/pdf https://doi.org/10.5194/bg-13-3585-2016 https://www.biogeosciences.net/13/3585/2016/ eng eng doi:10.5194/bg-13-3585-2016 https://www.biogeosciences.net/13/3585/2016/ eISSN: 1726-4189 Text 2018 ftcopernicus https://doi.org/10.5194/bg-13-3585-2016 2019-12-24T09:52:16Z Recent modeling results suggest that oceanic oxygen levels will decrease significantly over the next decades to centuries in response to climate change and altered ocean circulation. Hence, the future ocean may experience major shifts in nutrient cycling triggered by the expansion and intensification of tropical oxygen minimum zones (OMZs), which are connected to the most productive upwelling systems in the ocean. There are numerous feedbacks among oxygen concentrations, nutrient cycling and biological productivity; however, existing knowledge is insufficient to understand physical, chemical and biological interactions in order to adequately assess past and potential future changes. In the following, we summarize one decade of research performed in the framework of the Collaborative Research Center 754 (SFB754) focusing on climate–biogeochemistry interactions in tropical OMZs. We investigated the influence of low environmental oxygen conditions on biogeochemical cycles, organic matter formation and remineralization, greenhouse gas production and the ecology in OMZ regions of the eastern tropical South Pacific compared to the weaker OMZ of the eastern tropical North Atlantic. Based on our findings, a coupling of primary production and organic matter export via the nitrogen cycle is proposed, which may, however, be impacted by several additional factors, e.g., micronutrients, particles acting as microniches, vertical and horizontal transport of organic material and the role of zooplankton and viruses therein. Text North Atlantic Copernicus Publications: E-Journals Pacific Biogeosciences 13 12 3585 3606 |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Recent modeling results suggest that oceanic oxygen levels will decrease significantly over the next decades to centuries in response to climate change and altered ocean circulation. Hence, the future ocean may experience major shifts in nutrient cycling triggered by the expansion and intensification of tropical oxygen minimum zones (OMZs), which are connected to the most productive upwelling systems in the ocean. There are numerous feedbacks among oxygen concentrations, nutrient cycling and biological productivity; however, existing knowledge is insufficient to understand physical, chemical and biological interactions in order to adequately assess past and potential future changes. In the following, we summarize one decade of research performed in the framework of the Collaborative Research Center 754 (SFB754) focusing on climate–biogeochemistry interactions in tropical OMZs. We investigated the influence of low environmental oxygen conditions on biogeochemical cycles, organic matter formation and remineralization, greenhouse gas production and the ecology in OMZ regions of the eastern tropical South Pacific compared to the weaker OMZ of the eastern tropical North Atlantic. Based on our findings, a coupling of primary production and organic matter export via the nitrogen cycle is proposed, which may, however, be impacted by several additional factors, e.g., micronutrients, particles acting as microniches, vertical and horizontal transport of organic material and the role of zooplankton and viruses therein. |
format |
Text |
author |
Löscher, Carolin R. Bange, Hermann W. Schmitz, Ruth A. Callbeck, Cameron M. Engel, Anja Hauss, Helena Kanzow, Torsten Kiko, Rainer Lavik, Gaute Loginova, Alexandra Melzner, Frank Meyer, Judith Neulinger, Sven C. Pahlow, Markus Riebesell, Ulf Schunck, Harald Thomsen, Sören Wagner, Hannes |
spellingShingle |
Löscher, Carolin R. Bange, Hermann W. Schmitz, Ruth A. Callbeck, Cameron M. Engel, Anja Hauss, Helena Kanzow, Torsten Kiko, Rainer Lavik, Gaute Loginova, Alexandra Melzner, Frank Meyer, Judith Neulinger, Sven C. Pahlow, Markus Riebesell, Ulf Schunck, Harald Thomsen, Sören Wagner, Hannes Water column biogeochemistry of oxygen minimum zones in the eastern tropical North Atlantic and eastern tropical South Pacific oceans |
author_facet |
Löscher, Carolin R. Bange, Hermann W. Schmitz, Ruth A. Callbeck, Cameron M. Engel, Anja Hauss, Helena Kanzow, Torsten Kiko, Rainer Lavik, Gaute Loginova, Alexandra Melzner, Frank Meyer, Judith Neulinger, Sven C. Pahlow, Markus Riebesell, Ulf Schunck, Harald Thomsen, Sören Wagner, Hannes |
author_sort |
Löscher, Carolin R. |
title |
Water column biogeochemistry of oxygen minimum zones in the eastern tropical North Atlantic and eastern tropical South Pacific oceans |
title_short |
Water column biogeochemistry of oxygen minimum zones in the eastern tropical North Atlantic and eastern tropical South Pacific oceans |
title_full |
Water column biogeochemistry of oxygen minimum zones in the eastern tropical North Atlantic and eastern tropical South Pacific oceans |
title_fullStr |
Water column biogeochemistry of oxygen minimum zones in the eastern tropical North Atlantic and eastern tropical South Pacific oceans |
title_full_unstemmed |
Water column biogeochemistry of oxygen minimum zones in the eastern tropical North Atlantic and eastern tropical South Pacific oceans |
title_sort |
water column biogeochemistry of oxygen minimum zones in the eastern tropical north atlantic and eastern tropical south pacific oceans |
publishDate |
2018 |
url |
https://doi.org/10.5194/bg-13-3585-2016 https://www.biogeosciences.net/13/3585/2016/ |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
eISSN: 1726-4189 |
op_relation |
doi:10.5194/bg-13-3585-2016 https://www.biogeosciences.net/13/3585/2016/ |
op_doi |
https://doi.org/10.5194/bg-13-3585-2016 |
container_title |
Biogeosciences |
container_volume |
13 |
container_issue |
12 |
container_start_page |
3585 |
op_container_end_page |
3606 |
_version_ |
1766127963313537024 |