Field

NCEP/NCAR precipitation
mean daily NMC reanalysis (1948)
X axis: whole world in 192 1.88° steps, first point at 0.00° E, last point at 358.12° E
Y axis: Gaussian grid with 94 steps, first point at 88.54° N, last point at 88.54° S

1-daily data available from 01Jan1948 to 31Dec2013 ( 24156 times)
Variable prate (mean Daily Precipitation Rate at surface) in Kg/m^2/s
Full metadata.

Get grid points, average area or generate subset

Mask:	no mask   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 mm/day leave in Kg/m^2/s

Create a field with lower time resolution

New time scale:	annual (Jul-Jun) annual (Jan-Dec) biannual seasonal monthly 10-daily 5-daily
New variable:	mean sd sum sum above sum below number min time of min max time of max first time last time of precipitation
Threshold:	no cut less than greater than Kg/m^2/s percentile normal 1971-2000
Minimum:	% valid data
First apply:	-day running mean
Missing data:	ignore, climatology, trend, persistence.

Create a field with lower spatial resolution

Average over blocks of longitude and latitude grid cells

Please consider downloading this field from the authoritative site.
If you really want to get it here, NCEP/NCAR precipitation is available as a netcdf file (size 842.772 MB).

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