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 mask15.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

(c) Crown copyright 2006, data supplied by the Met Office. The UKMO license does not allow us to redistribute this file. Please consult their website for further information.