HadSLP2.0 non-interpolated observations
X axis: whole world in 72 5.00° steps,
first point at 180.00° W, last point at 175.00° E
Y axis: regular grid with 37 5.00° steps,
first point at 90.00° S, last point at 90.00° N
Monthly data available from Jan1850 to Dec2004 (1860 months)
Variable slp (mean sea-level pressure) in hPa Full metadata.