Can oxygen utilization rate be used to track the long-term changes of aerobic respiration in the mesopelagic Atlantic ocean?
Quantifying changes in oceanic aerobic respiration is essential for understanding marine deoxygenation. Here we use an Earth system model to investigate if and to what extent oxygen utilization rate (OUR) can be used to track the temporal change of true respiration (Rtrue). Rtrue results from the de...
Published in: | Geophysical Research Letters |
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Format: | Article in Journal/Newspaper |
Language: | English |
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AGU (American Geophysical Union)
2023
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Online Access: | https://oceanrep.geomar.de/id/eprint/58181/ https://oceanrep.geomar.de/id/eprint/58181/7/Guo_Oxygen_GRL_2023.pdf https://oceanrep.geomar.de/id/eprint/58181/8/2022gl102645-sup-0001-supporting%20information%20si-s01.pdf https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022GL102645 https://doi.org/10.1029/2022GL102645 |
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ftoceanrep:oai:oceanrep.geomar.de:58181 2024-02-11T10:06:16+01:00 Can oxygen utilization rate be used to track the long-term changes of aerobic respiration in the mesopelagic Atlantic ocean? Guo, Haichao Kriest, Iris Oschlies, Andreas Koeve, Wolfgang 2023-07-16 text https://oceanrep.geomar.de/id/eprint/58181/ https://oceanrep.geomar.de/id/eprint/58181/7/Guo_Oxygen_GRL_2023.pdf https://oceanrep.geomar.de/id/eprint/58181/8/2022gl102645-sup-0001-supporting%20information%20si-s01.pdf https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022GL102645 https://doi.org/10.1029/2022GL102645 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/58181/7/Guo_Oxygen_GRL_2023.pdf https://oceanrep.geomar.de/id/eprint/58181/8/2022gl102645-sup-0001-supporting%20information%20si-s01.pdf Guo, H., Kriest, I. , Oschlies, A. and Koeve, W. (2023) Can oxygen utilization rate be used to track the long-term changes of aerobic respiration in the mesopelagic Atlantic ocean?. Open Access Geophysical Research Letters, 50 (13). Art.Nr. e2022GL102645. DOI 10.1029/2022GL102645 <https://doi.org/10.1029/2022GL102645>. doi:10.1029/2022GL102645 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2023 ftoceanrep https://doi.org/10.1029/2022GL102645 2024-01-15T00:26:44Z Quantifying changes in oceanic aerobic respiration is essential for understanding marine deoxygenation. Here we use an Earth system model to investigate if and to what extent oxygen utilization rate (OUR) can be used to track the temporal change of true respiration (Rtrue). Rtrue results from the degradation of particulate and dissolved organic matter in the model ocean, acting as ground truth to evaluate the accuracy of OUR. Results show that in thermocline and intermediate waters of the North Atlantic Subtropical Gyre (200–1,000 m), vertically integrated OUR and Rtrue both decrease by 0.2 molO2/m2/yr from 1850 to 2100 under global warming. However, in the mesopelagic Tropical South Atlantic, integrated OUR increases by 0.2 molO2/m2/yr, while the Rtrue integral decreases by 0.3 molO2/m2/yr. A possible reason for the diverging OUR and Rtrue is ocean mixing, which affects water mass composition and maps remote respiration changes to the study region. Key Points: - Our model study confirms earlier findings that oxygen utilization rate (OUR) underestimates true respiration (Rtrue) in mesopelagic ocean - Despite OUR underestimate Rtrue, OUR can adequately estimate long-term changes in Rtrue in the mesopelagic North Atlantic subtropical gyre - OUR cannot adequately estimate climate-driven changes in Rtrue in the mesopelagic tropical South Atlantic where different water masses mix Article in Journal/Newspaper North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Geophysical Research Letters 50 13 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Quantifying changes in oceanic aerobic respiration is essential for understanding marine deoxygenation. Here we use an Earth system model to investigate if and to what extent oxygen utilization rate (OUR) can be used to track the temporal change of true respiration (Rtrue). Rtrue results from the degradation of particulate and dissolved organic matter in the model ocean, acting as ground truth to evaluate the accuracy of OUR. Results show that in thermocline and intermediate waters of the North Atlantic Subtropical Gyre (200–1,000 m), vertically integrated OUR and Rtrue both decrease by 0.2 molO2/m2/yr from 1850 to 2100 under global warming. However, in the mesopelagic Tropical South Atlantic, integrated OUR increases by 0.2 molO2/m2/yr, while the Rtrue integral decreases by 0.3 molO2/m2/yr. A possible reason for the diverging OUR and Rtrue is ocean mixing, which affects water mass composition and maps remote respiration changes to the study region. Key Points: - Our model study confirms earlier findings that oxygen utilization rate (OUR) underestimates true respiration (Rtrue) in mesopelagic ocean - Despite OUR underestimate Rtrue, OUR can adequately estimate long-term changes in Rtrue in the mesopelagic North Atlantic subtropical gyre - OUR cannot adequately estimate climate-driven changes in Rtrue in the mesopelagic tropical South Atlantic where different water masses mix |
format |
Article in Journal/Newspaper |
author |
Guo, Haichao Kriest, Iris Oschlies, Andreas Koeve, Wolfgang |
spellingShingle |
Guo, Haichao Kriest, Iris Oschlies, Andreas Koeve, Wolfgang Can oxygen utilization rate be used to track the long-term changes of aerobic respiration in the mesopelagic Atlantic ocean? |
author_facet |
Guo, Haichao Kriest, Iris Oschlies, Andreas Koeve, Wolfgang |
author_sort |
Guo, Haichao |
title |
Can oxygen utilization rate be used to track the long-term changes of aerobic respiration in the mesopelagic Atlantic ocean? |
title_short |
Can oxygen utilization rate be used to track the long-term changes of aerobic respiration in the mesopelagic Atlantic ocean? |
title_full |
Can oxygen utilization rate be used to track the long-term changes of aerobic respiration in the mesopelagic Atlantic ocean? |
title_fullStr |
Can oxygen utilization rate be used to track the long-term changes of aerobic respiration in the mesopelagic Atlantic ocean? |
title_full_unstemmed |
Can oxygen utilization rate be used to track the long-term changes of aerobic respiration in the mesopelagic Atlantic ocean? |
title_sort |
can oxygen utilization rate be used to track the long-term changes of aerobic respiration in the mesopelagic atlantic ocean? |
publisher |
AGU (American Geophysical Union) |
publishDate |
2023 |
url |
https://oceanrep.geomar.de/id/eprint/58181/ https://oceanrep.geomar.de/id/eprint/58181/7/Guo_Oxygen_GRL_2023.pdf https://oceanrep.geomar.de/id/eprint/58181/8/2022gl102645-sup-0001-supporting%20information%20si-s01.pdf https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022GL102645 https://doi.org/10.1029/2022GL102645 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/58181/7/Guo_Oxygen_GRL_2023.pdf https://oceanrep.geomar.de/id/eprint/58181/8/2022gl102645-sup-0001-supporting%20information%20si-s01.pdf Guo, H., Kriest, I. , Oschlies, A. and Koeve, W. (2023) Can oxygen utilization rate be used to track the long-term changes of aerobic respiration in the mesopelagic Atlantic ocean?. Open Access Geophysical Research Letters, 50 (13). Art.Nr. e2022GL102645. DOI 10.1029/2022GL102645 <https://doi.org/10.1029/2022GL102645>. doi:10.1029/2022GL102645 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2022GL102645 |
container_title |
Geophysical Research Letters |
container_volume |
50 |
container_issue |
13 |
_version_ |
1790603863871455232 |