CMEMS-LSCE: a global, 0.25°, monthly reconstruction of the surface ocean carbonate system

Observation-based data reconstructions of global surface ocean carbonate system variables play an essential role in monitoring the recent status of ocean carbon uptake and ocean acidification, as well as their impacts on marine organisms and ecosystems. So far, ongoing efforts are directed towards e...

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Published in:Earth System Science Data
Main Authors: Chau, Thi-Tuyet-Trang, Gehlen, Marion, Metzl, Nicolas, Chevallier, Frédéric
Format: Text
Language:English
Published: 2024
Subjects:
Online Access:https://doi.org/10.5194/essd-16-121-2024
https://essd.copernicus.org/articles/16/121/2024/
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spelling ftcopernicus:oai:publications.copernicus.org:essd110866 2024-02-11T10:07:36+01:00 CMEMS-LSCE: a global, 0.25°, monthly reconstruction of the surface ocean carbonate system Chau, Thi-Tuyet-Trang Gehlen, Marion Metzl, Nicolas Chevallier, Frédéric 2024-01-10 application/pdf https://doi.org/10.5194/essd-16-121-2024 https://essd.copernicus.org/articles/16/121/2024/ eng eng doi:10.5194/essd-16-121-2024 https://essd.copernicus.org/articles/16/121/2024/ eISSN: 1866-3516 Text 2024 ftcopernicus https://doi.org/10.5194/essd-16-121-2024 2024-01-15T17:24:14Z Observation-based data reconstructions of global surface ocean carbonate system variables play an essential role in monitoring the recent status of ocean carbon uptake and ocean acidification, as well as their impacts on marine organisms and ecosystems. So far, ongoing efforts are directed towards exploring new approaches to describe the complete marine carbonate system and to better recover its fine-scale features. In this respect, our research activities within the Copernicus Marine Environment Monitoring Service (CMEMS) aim to develop a sustainable production chain of observation-derived global ocean carbonate system datasets at high space–time resolutions. As the start of the long-term objective, this study introduces a new global 0.25 ∘ monthly reconstruction, namely CMEMS-LSCE (Laboratoire des Sciences du Climat et de l'Environnement) for the period 1985–2021. The CMEMS-LSCE reconstruction derives datasets of six carbonate system variables, including surface ocean partial pressure of CO 2 ( p CO 2 ), total alkalinity ( A T ), total dissolved inorganic carbon ( C T ), surface ocean pH, and saturation states with respect to aragonite ( Ω ar ) and calcite ( Ω ca ). Reconstructing p CO 2 relies on an ensemble of neural network models mapping gridded observation-based data provided by the Surface Ocean CO 2 ATlas (SOCAT). Surface ocean A T is estimated with a multiple-linear-regression approach, and the remaining carbonate variables are resolved by CO 2 system speciation given the reconstructed p CO 2 and A T 1 σ uncertainty associated with these estimates is also provided. Here, σ stands for either the ensemble standard deviation of p CO 2 estimates or the total uncertainty for each of the five other variables propagated through the processing chain with input data uncertainty. We demonstrate that the 0.25 ∘ resolution p CO 2 product outperforms a coarser spatial resolution (1 ∘ ) thanks to higher data coverage nearshore and a better description of horizontal and temporal variations in p CO 2 across diverse ... Text Ocean acidification Copernicus Publications: E-Journals Earth System Science Data 16 1 121 160
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collection Copernicus Publications: E-Journals
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language English
description Observation-based data reconstructions of global surface ocean carbonate system variables play an essential role in monitoring the recent status of ocean carbon uptake and ocean acidification, as well as their impacts on marine organisms and ecosystems. So far, ongoing efforts are directed towards exploring new approaches to describe the complete marine carbonate system and to better recover its fine-scale features. In this respect, our research activities within the Copernicus Marine Environment Monitoring Service (CMEMS) aim to develop a sustainable production chain of observation-derived global ocean carbonate system datasets at high space–time resolutions. As the start of the long-term objective, this study introduces a new global 0.25 ∘ monthly reconstruction, namely CMEMS-LSCE (Laboratoire des Sciences du Climat et de l'Environnement) for the period 1985–2021. The CMEMS-LSCE reconstruction derives datasets of six carbonate system variables, including surface ocean partial pressure of CO 2 ( p CO 2 ), total alkalinity ( A T ), total dissolved inorganic carbon ( C T ), surface ocean pH, and saturation states with respect to aragonite ( Ω ar ) and calcite ( Ω ca ). Reconstructing p CO 2 relies on an ensemble of neural network models mapping gridded observation-based data provided by the Surface Ocean CO 2 ATlas (SOCAT). Surface ocean A T is estimated with a multiple-linear-regression approach, and the remaining carbonate variables are resolved by CO 2 system speciation given the reconstructed p CO 2 and A T 1 σ uncertainty associated with these estimates is also provided. Here, σ stands for either the ensemble standard deviation of p CO 2 estimates or the total uncertainty for each of the five other variables propagated through the processing chain with input data uncertainty. We demonstrate that the 0.25 ∘ resolution p CO 2 product outperforms a coarser spatial resolution (1 ∘ ) thanks to higher data coverage nearshore and a better description of horizontal and temporal variations in p CO 2 across diverse ...
format Text
author Chau, Thi-Tuyet-Trang
Gehlen, Marion
Metzl, Nicolas
Chevallier, Frédéric
spellingShingle Chau, Thi-Tuyet-Trang
Gehlen, Marion
Metzl, Nicolas
Chevallier, Frédéric
CMEMS-LSCE: a global, 0.25°, monthly reconstruction of the surface ocean carbonate system
author_facet Chau, Thi-Tuyet-Trang
Gehlen, Marion
Metzl, Nicolas
Chevallier, Frédéric
author_sort Chau, Thi-Tuyet-Trang
title CMEMS-LSCE: a global, 0.25°, monthly reconstruction of the surface ocean carbonate system
title_short CMEMS-LSCE: a global, 0.25°, monthly reconstruction of the surface ocean carbonate system
title_full CMEMS-LSCE: a global, 0.25°, monthly reconstruction of the surface ocean carbonate system
title_fullStr CMEMS-LSCE: a global, 0.25°, monthly reconstruction of the surface ocean carbonate system
title_full_unstemmed CMEMS-LSCE: a global, 0.25°, monthly reconstruction of the surface ocean carbonate system
title_sort cmems-lsce: a global, 0.25°, monthly reconstruction of the surface ocean carbonate system
publishDate 2024
url https://doi.org/10.5194/essd-16-121-2024
https://essd.copernicus.org/articles/16/121/2024/
genre Ocean acidification
genre_facet Ocean acidification
op_source eISSN: 1866-3516
op_relation doi:10.5194/essd-16-121-2024
https://essd.copernicus.org/articles/16/121/2024/
op_doi https://doi.org/10.5194/essd-16-121-2024
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