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 eleven Observation System Simulation Experiments (OSSEs) were completed. Each OSSE is a Feed-Forward Neural Network (FFNN) that is based on a different data distributi...
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ftcopernicus:oai:publications.copernicus.org:osd93148 2023-05-15T18:25:32+02:00 Observation System Simulation Experiments in the Atlantic Ocean for enhanced surface ocean pCO2 reconstructions Denvil-Sommer, Anna Gehlen, Marion Vrac, Mathieu 2021-03-10 application/pdf https://doi.org/10.5194/os-2021-17 https://os.copernicus.org/preprints/os-2021-17/ eng eng doi:10.5194/os-2021-17 https://os.copernicus.org/preprints/os-2021-17/ eISSN: 1812-0792 Text 2021 ftcopernicus https://doi.org/10.5194/os-2021-17 2021-03-15T17:22:14Z To derive an optimal observation system for surface ocean p CO 2 in the Atlantic Ocean and the Atlantic sector of the Southern Ocean eleven Observation System Simulation Experiments (OSSEs) were completed. Each OSSE is a Feed-Forward 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 day time interval. Based on the geographical and time positions from three observational platforms, volunteering observing ships (VOS), 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 |
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Copernicus Publications: E-Journals |
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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 eleven Observation System Simulation Experiments (OSSEs) were completed. Each OSSE is a Feed-Forward 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 day time interval. Based on the geographical and time positions from three observational platforms, volunteering observing ships (VOS), 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-2021-17 https://os.copernicus.org/preprints/os-2021-17/ |
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-2021-17 https://os.copernicus.org/preprints/os-2021-17/ |
op_doi |
https://doi.org/10.5194/os-2021-17 |
_version_ |
1766207051393925120 |