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Watson, Andrew J; Schuster, Ute; Shutler, Jamie D; Holding, Thomas; Ashton, Ian G C; Landschützer, Peter; Woolf, David K; Goddijn-Murphy, Lonneke (2020): Interpolated Global surface ocean carbon dioxide partial pressure and ocean-atmosphere fluxes 1992-2018, corrected for surface temperature deviations. PANGAEA, https://doi.org/10.1594/PANGAEA.922985

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Abstract:
The data set consists of interpolated fields of global surface ocean partial pressure of carbon dioxide (pCO2sw) and the flux of CO2 between ocean and atmosphere, on monthly time and 1-degree latitude and longitude, between January 1992 and December 2018. The pCO2sw is interpolated to this grid from the data set of Holding et al: https://doi.org/10.1594/PANGAEA.905316, which is in turn derived from the the SOCATv2019 observational data (https://www.socat.info/) where the observations have been corrected to the surface subskin temperature using satellite-derived surface temperature products. The interpolation uses the neural net technique of Landschützer et al. ( Biogeosciences 10, 7793-7815, doi:10.5194/bg-10-7793-2013 2013). The ocean-atmosphere flux is then calculated, using the gas transfer equation with the gas transfer velocity parameterized as a function of wind speed and atmospheric mixing ratio of CO2, with a further correction for the cool (and salty) surface ocean skin. These corrections for near-surface temperature deviations increase the net negative (e.g. into the ocean) flux. Full details are given in the corresponding article in Nature Communications (doi:10.1038/s41467-020-18203-3) and its accompanying extended data.
Keyword(s):
ocean-atmosphere CO2 flux; Ocean sink
Supplement to:
Watson, Andrew J; Schuster, Ute; Shutler, Jamie D; Holding, Thomas; Ashton, Ian G C; Landschützer, Peter; Woolf, David K; Goddijn-Murphy, Lonneke (2020): Revised estimates of ocean-atmosphere CO2 flux are consistent with ocean carbon inventory. Nature Communications, 11(1), https://doi.org/10.1038/s41467-020-18203-3
Related to:
Holding, Thomas; Ashton, Ian G C; Shutler, Jamie D (2019): Reanalysed (depth and temperature consistent) surface ocean CO₂ atlas (SOCAT) version 2019. PANGAEA, https://doi.org/10.1594/PANGAEA.905316
Comment:
This data submission comprises two files in NETcdf (classic version 4) format:
“watson_et_al_natcomms_surface_pco2.nc” and “watson_et_al_natcomms_surface_fgco2.nc”. The
“… surface_pco2 …” file contains estimates a variable spco2, which is global surface ocean partial
pressure of carbon dioxide (pCO2) in microatmospheres. The “… surface_fgco2 …” file contains a
variable fgco2, which is global ocean‐atmosphere flux of carbon dioxide in mol m‐2 s‐1. The estimates
are on a 1 x 1 degree latitude and longitude, and 1 month time resolution, for months between
January 1992 and December 2018. The pCO2 is corrected to the ocean “subskin” temperature, a few
millimetres below the surface, and the flux estimates are corrected for near‐surface temperature
deviations that substantially affect the flux calculation.
The files also contain grid variables which denote the centre in time or space of the gridpoints:
time: (months, 1‐324 where 1 is January 1992, months are taken to be of equal length, 1/12 of a
year).
longitude: (‐179.5, ‐178.5, …. 179.5) degrees east
latitude: (‐89.5 ‐88.5, … 89.5) degrees north
The derivation of the data is described in detail in the Methods section and supplementary
information of (Watson et al. 2020)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Binary ObjectBinaryWatson, Andrew J
2Binary Object (Media Type)Binary (Type)Watson, Andrew J
3Binary Object (File Size)Binary (Size)BytesWatson, Andrew J
Size:
2 data points

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