Field

ICOADS 3.0 nobs SLP
ICOADS 2-degree Standard
X axis: whole world in 180 2.00° steps, first point at 1.00° E, last point at 359.00° E
Y axis: regular grid with 90 -2.00° steps, first point at 89.00° N, last point at 89.00° S

Monthly data available from Jan1800 to Jul2024 (2695 months)
Variable slp (Sea Level Pressure Monthly Number of Observations at Surface) in observations
Full metadata.

Get grid points, average area or generate subset

Mask:	no mask mask2.txt   add a mask to the list
Latitude:	°N - °N
Longitude:	°E - °E
Year range:	-
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

First fill missing data:	ignore, climatology, trend, persistence.
Then apply:	-month running mean with direction backward centred forward
Then apply new time scale:	keep same 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 nobs SLP
Minimum:	% valid data
Threshold:	no cut less than greater than observations percentile normal 1971-2000

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, ICOADS 3.0 nobs SLP is available as a netcdf file (size 10.778 MB).

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