A combined global ocean pCO2 climatology combining open ocean and coastal areas

by Peter Landschützer,1, Goulven Laruelle2, Alizee Roobaert2, Pierre Regnier2

1Max Planck Institute for Meteorology, Hamburg, Germany
2Department Geoscience, Environment and Society (DGES), Université Libre de Bruxelles, Brussels, CP16002, Belgium,

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Abstract

The partial pressure of carbon dioxide (pCO2) climatology was created by merging 2 published and publicly available pCO2 datasets covering the open ocean (Landschützer et. al 2016) and the coastal ocean (Laruelle et. al 2017). Both fields were initially created using a 2-step neural network technique. In a first step, the global ocean is divided into 16 biogeochemical provinces using a self-organizing map. In a second step, the non-linear relationship between variables known to drive the surface ocean carbon system and gridded observations from the SOCAT open and coastal ocean datasets (Bakker et. al 2016) is reconstructed using a feed-forward neural network within each province separately. The final product is then produced by projecting driving variables, e.g., surface temperature, chlorophyll, mixed layer depth, and atmospheric CO2 onto oceanic pCO2 using these non-linear relationships (see Landschützer et. al 2016 and Laruelle et. al 2017 for more detail). This results in monthly open ocean pCO2 fields at 1°x1° resolution and coastal ocean pCO2 fields at 0.25°x0.25° resolution. To merge the products, we divided each 1°x1° open ocean bin into 16 equal 0.25°x0.25° bins without any interpolation. The common overlap area of the products has been merged by scaling the respective products by their mismatch compared to observations from the SOCAT datasets (see Landschützer et. al 2020)

This product is free to be used. Please cite this data set as:
Landschützer, Peter; Laruelle, Goulven; Roobaert, Alizee; Regnier, Pierre (2020). A combined global ocean pCO2 climatology combining open ocean and coastal areas (NCEI Accession 0209633). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. doi: https://doi.org/10.25921/qb25-f418. Accessed [2020-04-08].

Please cite the method as:
Landschützer, P., Laruelle, G. G., Roobaert, A. and Regnier, P.: A uniform pCO2 climatology combining open and coastal oceans. Submitted to Earth System Science Data (to be updated)

Last Modified: 2020-05-22 16:59 UTC