Field

HadSLP2.0 SLP
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.

Get grid points, average area or generate subset

Mask:	no mask mask4.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
Units:	convert to mb leave in hPa

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 SLP
Threshold:	no cut less than greater than hPa 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

Compute geostrophic wind components from this field

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, HadSLP2.0 SLP is available as a netcdf file (size 6.01246 MB).

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