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 08Nov2024 ( 28129 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
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
Units:	convert to mm/day leave in Kg/m^2/s

Create a field with lower time resolution

First fill missing data:	ignore, climatology, trend, persistence.
Then apply:	-day running mean with direction backward centred forward
Then apply new time scale:	keep same 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
Minimum:	% valid data
Threshold:	no cut less than greater than Kg/m^2/s percentile normal 1971-2000

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 705.619 MB).

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