Development of the Regional Carbon Cycle Model in the Central Pacific Sector of the Southern Ocean
Abstract This study develops a new regional model of the Southern Ocean including an improved representation of the iron biogeochemistry and ecosystem component, nesting within a biogeochemical ocean state estimate, and benchmarking with a suite of observations. The regional domain focuses on the Ud...
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2022
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ftdoajarticles:oai:doaj.org/article:82ff4b6551154e2f9c8fa93f01e612d8 2023-05-15T13:41:31+02:00 Development of the Regional Carbon Cycle Model in the Central Pacific Sector of the Southern Ocean Takamitsu Ito 2022-06-01T00:00:00Z https://doi.org/10.1029/2021MS002757 https://doaj.org/article/82ff4b6551154e2f9c8fa93f01e612d8 EN eng American Geophysical Union (AGU) https://doi.org/10.1029/2021MS002757 https://doaj.org/toc/1942-2466 1942-2466 doi:10.1029/2021MS002757 https://doaj.org/article/82ff4b6551154e2f9c8fa93f01e612d8 Journal of Advances in Modeling Earth Systems, Vol 14, Iss 6, Pp n/a-n/a (2022) ocean modeling carbon cycle Antarctic Southern Ocean Physical geography GB3-5030 Oceanography GC1-1581 article 2022 ftdoajarticles https://doi.org/10.1029/2021MS002757 2022-12-31T02:24:48Z Abstract This study develops a new regional model of the Southern Ocean including an improved representation of the iron biogeochemistry and ecosystem component, nesting within a biogeochemical ocean state estimate, and benchmarking with a suite of observations. The regional domain focuses on the Udintsev Fracture Zone (UFZ) in the central Pacific sector of the Southern Ocean. The UFZ is characterized by the deep gap between the Pacific‐Antarctic Ridge and the East Pacific Rise, which is one of the key “choke points” of the Antarctic Circumpolar Current where major Southern Ocean fronts are constrained within close proximity to this topographic feature. It is also a region of elevated mesoscale eddy activity, especially downstream of the UFZ. The model reproduces observed partial pressure of carbon dioxide in the surface water (pCO2) remarkably well from seasonal to interannual timescales relative to prior studies (r = 0.89). The seasonality of pCO2 is difficult to simulate correctly because it is a small residual between the opposing influences of temperature and carbon. This model represents an intermittent double peak pattern of pCO2; one driven by the summertime high temperature and another from the wintertime high of dissolved inorganic carbon. The model also captures the spatial and temporal structure of the regional net primary production with respect to the satellite ocean color products (r = 0.57). The model is further validated by comparing it with biogeochemical float observations from the Southern Ocean Carbon and Climate Observations and Modeling project, revealing the model performance and challenges to accurately represent physical and biogeochemical properties in frontal regions. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean The Antarctic Pacific Udintsev Fracture Zone ENVELOPE(-145.000,-145.000,-57.000,-57.000) Journal of Advances in Modeling Earth Systems 14 6 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
ocean modeling carbon cycle Antarctic Southern Ocean Physical geography GB3-5030 Oceanography GC1-1581 |
spellingShingle |
ocean modeling carbon cycle Antarctic Southern Ocean Physical geography GB3-5030 Oceanography GC1-1581 Takamitsu Ito Development of the Regional Carbon Cycle Model in the Central Pacific Sector of the Southern Ocean |
topic_facet |
ocean modeling carbon cycle Antarctic Southern Ocean Physical geography GB3-5030 Oceanography GC1-1581 |
description |
Abstract This study develops a new regional model of the Southern Ocean including an improved representation of the iron biogeochemistry and ecosystem component, nesting within a biogeochemical ocean state estimate, and benchmarking with a suite of observations. The regional domain focuses on the Udintsev Fracture Zone (UFZ) in the central Pacific sector of the Southern Ocean. The UFZ is characterized by the deep gap between the Pacific‐Antarctic Ridge and the East Pacific Rise, which is one of the key “choke points” of the Antarctic Circumpolar Current where major Southern Ocean fronts are constrained within close proximity to this topographic feature. It is also a region of elevated mesoscale eddy activity, especially downstream of the UFZ. The model reproduces observed partial pressure of carbon dioxide in the surface water (pCO2) remarkably well from seasonal to interannual timescales relative to prior studies (r = 0.89). The seasonality of pCO2 is difficult to simulate correctly because it is a small residual between the opposing influences of temperature and carbon. This model represents an intermittent double peak pattern of pCO2; one driven by the summertime high temperature and another from the wintertime high of dissolved inorganic carbon. The model also captures the spatial and temporal structure of the regional net primary production with respect to the satellite ocean color products (r = 0.57). The model is further validated by comparing it with biogeochemical float observations from the Southern Ocean Carbon and Climate Observations and Modeling project, revealing the model performance and challenges to accurately represent physical and biogeochemical properties in frontal regions. |
format |
Article in Journal/Newspaper |
author |
Takamitsu Ito |
author_facet |
Takamitsu Ito |
author_sort |
Takamitsu Ito |
title |
Development of the Regional Carbon Cycle Model in the Central Pacific Sector of the Southern Ocean |
title_short |
Development of the Regional Carbon Cycle Model in the Central Pacific Sector of the Southern Ocean |
title_full |
Development of the Regional Carbon Cycle Model in the Central Pacific Sector of the Southern Ocean |
title_fullStr |
Development of the Regional Carbon Cycle Model in the Central Pacific Sector of the Southern Ocean |
title_full_unstemmed |
Development of the Regional Carbon Cycle Model in the Central Pacific Sector of the Southern Ocean |
title_sort |
development of the regional carbon cycle model in the central pacific sector of the southern ocean |
publisher |
American Geophysical Union (AGU) |
publishDate |
2022 |
url |
https://doi.org/10.1029/2021MS002757 https://doaj.org/article/82ff4b6551154e2f9c8fa93f01e612d8 |
long_lat |
ENVELOPE(-145.000,-145.000,-57.000,-57.000) |
geographic |
Antarctic Southern Ocean The Antarctic Pacific Udintsev Fracture Zone |
geographic_facet |
Antarctic Southern Ocean The Antarctic Pacific Udintsev Fracture Zone |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Journal of Advances in Modeling Earth Systems, Vol 14, Iss 6, Pp n/a-n/a (2022) |
op_relation |
https://doi.org/10.1029/2021MS002757 https://doaj.org/toc/1942-2466 1942-2466 doi:10.1029/2021MS002757 https://doaj.org/article/82ff4b6551154e2f9c8fa93f01e612d8 |
op_doi |
https://doi.org/10.1029/2021MS002757 |
container_title |
Journal of Advances in Modeling Earth Systems |
container_volume |
14 |
container_issue |
6 |
_version_ |
1766151691319640064 |