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Global analysis of surface ocean CO2 fugacity and air-sea fluxes with low latency
  • Thi-Tuyet-Trang Chau,
  • Frederic Chevallier,
  • Marion Gehlen
Thi-Tuyet-Trang Chau
Laboratoire des Sciences du Climat et de l'Environnement

Corresponding Author:[email protected]

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Frederic Chevallier
Laboratoire des Sciences du Climat et de l'Environnement (LSCE)
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Marion Gehlen
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The Surface Ocean CO2 Atlas (SOCAT) of CO2 fugacity (fCO2) observations is a key resource supporting annual assessments of CO2 uptake by the ocean and its side effects on the marine ecosystem. SOCAT data are usually released with a lag of up to 1.5 years which hampers timely quantification of recent variations of carbon fluxes between the Earth System components, not only with the ocean. This study uses a statistical ensemble approach to analyse fCO2 with a latency of one month only based on the previous SOCAT release and a series of predictors. A retrospective prediction for the years 2021-2022 is made to test the model skill, followed by the generation of fCO2 and fluxes from January to August in 2023. Results indicate a modest degradation of the model skill in prediction mode and open the possibility to provide robust information about marine carbonate system variables with low latency.
07 Oct 2023Submitted to ESS Open Archive
14 Oct 2023Published in ESS Open Archive