Surface Ocean CO<sub>2</sub> Atlas (SOCAT) gridded data products

Abstract

Abstract. As a response to public demand for a welldocumented, quality controlled, publically available, global surface ocean carbon dioxide (CO 2 ) data set, the international marine carbon science community developed the Surface Ocean CO 2 Atlas (SOCAT). The first SOCAT product is a collection of 6.3 million quality controlled surface CO 2 data from the global oceans and coastal seas, spanning four decades . The SOCAT gridded data presented here is the second data product to come from the SOCAT project. Recognizing that some groups may have trouble working with millions of measurements, the SOCAT gridded product was generated to provide a robust, regularly spaced CO 2 fugacity ( f CO 2 ) product with minimal spatial and temporal interpolation, which should be easier to work with for many applications. Gridded SOCAT is rich with information that has not been fully explored yet (e.g., regional differences in the seasonal cycles), but also contains biases and limitations that the user needs to recognize and address (e.g., local influences on values in some coastal regions). Data coverage and parameter measuredRepository-Reference:

Global high-resolution monthly <i>p</i>CO<sub>2</sub> climatology for the coastal ocean derived from neural network interpolation

“…Additionally, biogeochemical fronts associated with river plumes, coastal currents and upwelling are characterized by spatial scales of the order of tens of kilometers or even smaller (Wijesekera et al, 2003). The chosen resolution is also identical to the gridded coastal pCO 2 product from the SOCAT initiative (Sabine et al, 2013;Bakker et al, 2014).…”

“…Finally, the surface ocean pCO 2 were taken from the gridded SOCATv4 product (Sabine et al, 2013;Bakker et al, 2016) while those used for the validation stem from the LDEOv2015 database . With our definition of the coastal zone, SOCATv4 contains ∼ 8 × 10 6 data points and LDEO ∼ 5.6 × 10 6 , with over 70 % of the data shared with SOCATv4.…”

Uncertainty in the global oceanic CO<sub>2</sub> uptake induced by wind forcing: quantification and spatial analysis

“…The remainder is estimated to be taken up in roughly equal shares by the land and the ocean. In past decades, the magnitude of the ocean carbon sink was mainly estimated from global ocean biogeochemistry models and atmospheric inverse models but the recent increase in oceanic CO 2 measurements and the creation of the Surface Ocean CO 2 Atlas (SOCAT) database Pfeil et al, 2013;Sabine et al, 2013) has opened new research avenues, including the possibility to monitor the temporal evolution of the global oceanic carbon sink based on surface ocean CO 2 measurements (Land-schützer et al, 2016;Rödenbeck et al, 2015). The exchange of CO 2 through the air-seawater interface can be estimated from the surface ocean CO 2 measurements using a relationship of the form…”

Ocean-Atmosphere Interactions of Gases and Particles

“…The methods in SOCAT are fully documented Sabine et al 2013). The products and individual cruises are citable through Digital Object Identifiers (DOI-s).…”