Table 1 Sources of data.
Variable | Used for | Data source | Product and reference |
---|---|---|---|
Sea surface fCO2 | SOM-FFN | SOCAT V20205 | |
Sea surface temperature | SOM-FFN, fCO2 temperature correction and air-sea flux | NOAA Optimum Interpolation product v236 | |
Sea surface salinity | SOM-FFN | https://www.metoffice.gov.uk/hadobs/en4/download-en4-2-1.html | Hadley Centre EN4 version EN4.2.156 |
Sea ice concentration | SOM-FFN | HadISST57 | |
Mixed layer depth | SOM-FFN | ||
Chlorophyll | SOM-FFN | ||
Marine boundary layer atmospheric xCO2 | SOM-FFN and air-sea flux | ftp://aftp.cmdl.noaa.gov/data/trace_gases/co2/flask/surface/. | |
Sea ice concentration | Air-sea flux and pseudo observations | ||
Sea level atmospheric pressure | Air-sea flux | www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis.surface.html | NCEP reanalysis53 |
Winds | Air-sea flux | ||
Temperature and salinity | Pseudo observations | Roemmich and Gilson climatology34 | |
Biogeochemical tracers | Pseudo observations | ||
Oxygen | Pseudo observations adjustment for surface oxygen undersaturation |