monthly mean slp from the NCEP Reanalysis
X axis: whole world in 144 2.50° steps,
first point at 0.00° E, last point at 357.50° E
Y axis: regular grid with 73 -2.50° steps,
first point at 90.00° N, last point at 90.00° S
Monthly data available from Jan1948 to Apr2021 ( 880 months)
Variable slp (Sea Level Pressure) in millibars Full metadata.