ICOADS v2.5 SLP
ICOADS 2-degree Enhanced
X axis: whole world in 180 2.00° steps,
first point at 1.00° E, last point at 359.00° E
Y axis: regular grid with 90 -2.00° steps,
first point at 89.00° N, last point at 89.00° S
Monthly data available from Jan1800 to Aug2021 (2660 months)
Variable slp (Sea Level Pressure Monthly Mean at Surface) in millibars Full metadata.
Please consider downloading this field from the authoritative site.
If you really want to get it here,
ICOADS v2.5 SLP is available as
a netcdf file (size 82.215 MB).