"ERA5 reanalysis, https://www.ecmwf.int/en/forecasts/datasets/reanalysis-datasets/era5" averaged over 2x 2 grid boxes
X axis: whole world in 720 0.50° steps,
first point at 0.12° E, last point at 359.62° E
Y axis: regular grid with 360 -0.50° steps,
first point at 89.88° N, last point at 89.62° S
1-daily data available from 01Jan1979 to 31Dec2018 ( 14640 times)
Variable msl (Sea Level Pressure) in Pa Full metadata.
The associated land/sea mask is available for some operations