Field

20CRv3 precipitation
mean Daily NOAA/CIRES/DOE 20th Century Reanalysis V3
X axis: whole world in 360 1.00° steps, first point at 0.00° E, last point at 359.00° E
Y axis: regular grid with 181 1.00° steps, first point at 90.00° S, last point at 90.00° N

1-daily data available from 01Jan1836 to 31Dec2015 ( 65880 times)
Variable prate (daily mean 3-hourly Precipitation Rate at surface) in kg/m^2/s
Full metadata. The associated land/sea mask is available for some operations

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
Considering:	everything land points sea points show/hide more only land points only sea points not land points not sea points
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, 20CRv3 precipitation is available as a netcdf file (size 10993.8 MB).

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