Observation system simulation experiments in the Atlantic Ocean for enhanced surface ocean pCO2 reconstructions
To derive an optimal observation system for surface ocean p CO 2 in the Atlantic Ocean and the Atlantic sector of the Southern Ocean, 11 observation system simulation experiments (OSSEs) were completed. Each OSSE is a feedforward neural network (FFNN) that is based on a different data distribution a...
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ftcopernicus:oai:publications.copernicus.org:os93148 2023-05-15T18:25:34+02:00 Observation system simulation experiments in the Atlantic Ocean for enhanced surface ocean pCO2 reconstructions Denvil-Sommer, Anna Gehlen, Marion Vrac, Mathieu 2021-08-02 application/pdf https://doi.org/10.5194/os-17-1011-2021 https://os.copernicus.org/articles/17/1011/2021/ eng eng doi:10.5194/os-17-1011-2021 https://os.copernicus.org/articles/17/1011/2021/ eISSN: 1812-0792 Text 2021 ftcopernicus https://doi.org/10.5194/os-17-1011-2021 2021-08-09T16:22:28Z To derive an optimal observation system for surface ocean p CO 2 in the Atlantic Ocean and the Atlantic sector of the Southern Ocean, 11 observation system simulation experiments (OSSEs) were completed. Each OSSE is a feedforward neural network (FFNN) that is based on a different data distribution and provides ocean surface p CO 2 for the period 2008–2010 with a 5 d time interval. Based on the geographical and time positions from three observational platforms, volunteering observing ships, Argo floats and OceanSITES moorings, pseudo-observations were constructed using the outputs from an online-coupled physical–biogeochemical global ocean model with 0.25 ∘ nominal resolution. The aim of this work was to find an optimal spatial distribution of observations to supplement the widely used Surface Ocean CO 2 Atlas (SOCAT) and to improve the accuracy of ocean surface p CO 2 reconstructions. OSSEs showed that the additional data from mooring stations and an improved coverage of the Southern Hemisphere with biogeochemical ARGO floats corresponding to least 25 % of the density of active floats (2008–2010) (OSSE 10) would significantly improve the p CO 2 reconstruction and reduce the bias of derived estimates of sea–air CO 2 fluxes by 74 % compared to ocean model outputs. Text Southern Ocean Copernicus Publications: E-Journals Southern Ocean Ocean Science 17 4 1011 1030 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
To derive an optimal observation system for surface ocean p CO 2 in the Atlantic Ocean and the Atlantic sector of the Southern Ocean, 11 observation system simulation experiments (OSSEs) were completed. Each OSSE is a feedforward neural network (FFNN) that is based on a different data distribution and provides ocean surface p CO 2 for the period 2008–2010 with a 5 d time interval. Based on the geographical and time positions from three observational platforms, volunteering observing ships, Argo floats and OceanSITES moorings, pseudo-observations were constructed using the outputs from an online-coupled physical–biogeochemical global ocean model with 0.25 ∘ nominal resolution. The aim of this work was to find an optimal spatial distribution of observations to supplement the widely used Surface Ocean CO 2 Atlas (SOCAT) and to improve the accuracy of ocean surface p CO 2 reconstructions. OSSEs showed that the additional data from mooring stations and an improved coverage of the Southern Hemisphere with biogeochemical ARGO floats corresponding to least 25 % of the density of active floats (2008–2010) (OSSE 10) would significantly improve the p CO 2 reconstruction and reduce the bias of derived estimates of sea–air CO 2 fluxes by 74 % compared to ocean model outputs. |
format |
Text |
author |
Denvil-Sommer, Anna Gehlen, Marion Vrac, Mathieu |
spellingShingle |
Denvil-Sommer, Anna Gehlen, Marion Vrac, Mathieu Observation system simulation experiments in the Atlantic Ocean for enhanced surface ocean pCO2 reconstructions |
author_facet |
Denvil-Sommer, Anna Gehlen, Marion Vrac, Mathieu |
author_sort |
Denvil-Sommer, Anna |
title |
Observation system simulation experiments in the Atlantic Ocean for enhanced surface ocean pCO2 reconstructions |
title_short |
Observation system simulation experiments in the Atlantic Ocean for enhanced surface ocean pCO2 reconstructions |
title_full |
Observation system simulation experiments in the Atlantic Ocean for enhanced surface ocean pCO2 reconstructions |
title_fullStr |
Observation system simulation experiments in the Atlantic Ocean for enhanced surface ocean pCO2 reconstructions |
title_full_unstemmed |
Observation system simulation experiments in the Atlantic Ocean for enhanced surface ocean pCO2 reconstructions |
title_sort |
observation system simulation experiments in the atlantic ocean for enhanced surface ocean pco2 reconstructions |
publishDate |
2021 |
url |
https://doi.org/10.5194/os-17-1011-2021 https://os.copernicus.org/articles/17/1011/2021/ |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
eISSN: 1812-0792 |
op_relation |
doi:10.5194/os-17-1011-2021 https://os.copernicus.org/articles/17/1011/2021/ |
op_doi |
https://doi.org/10.5194/os-17-1011-2021 |
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Ocean Science |
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17 |
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4 |
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1011 |
op_container_end_page |
1030 |
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1766207122639421440 |