X axis: whole world in 240 1.50° steps, first point at 178.50° W, last point at 180.00° E
Y axis: regular grid with 181 1.00° steps, first point at 90.00° S, last point at 90.00° N

Monthly data available from Nov1978 to May2020 ( 499 months) , time refers to the time coordinate values

Variable Average_O3_column (Monthly average of ozone column distribution) in Dobson units
Full metadata.

Get grid points, average area or generate subset

Mask:	no mask mask7.txt   add a mask to the list
Latitude:	°N - °N
Longitude:	°E - °E
Boundaries:	halfway grid points interpolated
Make:	average max min set of grid points subset of the field
Demand at least:	% valid points in this region

Create a field with lower time resolution

New time scale:	annual (Jul-Jun) annual (Jan-Dec) biannual seasonal
New variable:	mean sd sum sum above sum below number min time of min max time of max first time last time of ozone
Threshold:	no cut less than greater than Dobson units percentile normal 1971-2000
Minimum:	% valid data
First apply:	-month running mean
Missing data:	ignore, climatology, trend, persistence.

Create a field with lower spatial resolution

Average over blocks of longitude and latitude grid cells

Construct a statistical forecast model from this field

Please consider downloading this field from the authoritative site.
If you really want to get it here, KNMI MSR ozone is available as a netcdf file (size 41.3613 MB).