Monday, September 18, 2017

Data: CHIRPS Global Gridded Rainfall V2.0

Introduction

Climate Hazards Group InfraRed Precipitation with Station data (CHIRPS) is a 30+ year quasi-global rainfall dataset. Spanning 50°S-50°N (and all longitudes), starting in 1981 to near-present, CHIRPS incorporates 0.05° resolution satellite imagery with in-situ station data to create gridded rainfall time series for trend analysis and seasonal drought monitoring. As of February 12th, 2015, version 2.0 of CHIRPS is complete and available to the public, and in NetCDF, GeoTiff, Bil format. The value of -9999 is used for bad values.

NetCDF

Download Ftp Address: ftp://ftp.chg.ucsb.edu/pub/org/chg/products/CHIRPS-2.0/global_monthly/netcdf/.
The NC data file should be converted to GeoTiff format to further investigation. However, this file is so LARGE, the memory of computer must be 30GB at least. Then, this file is not recommended to download to application.
Fig. 1

GeoTiff (Highly Recommended)

Download Ftp Address: ftp://chg-ftpout.geog.ucsb.edu/pub/org/chg/products/CHIRPS-2.0/global_monthly/tifs/
The number of GTiff files is 436, consisting of 198101~201707, and everyone can download them using ftp software (e.g. Fillzilla).
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ftp chg-ftpout.geog.ucsb.edu
username: anonymous 
password: your_email_address
cd  /pub/org/chg/products/CHIRPS-2.0/
Fig. 2

References

[2] CHIRPS FAQ.
[3] Funk, C.C., Peterson, P.J., Landsfeld, M.F., Pedreros, D.H., Verdin, J.P., Rowland, J.D., Romero, B.E., Husak, G.J., Michaelsen, J.C., and Verdin, A.P., 2014, A quasi-global precipitation time series for drought monitoring: U.S. Geological Survey Data Series 832, 4 p., http://dx.doi.org/110.3133/ds832.

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