GPCP
Contents
GPCP¶
Overview¶
The Global Precipitation Climatology Project (GPCP), produced by the NASA Mesoscale Atmospheric Processes Laboratory, comprises threee products: one-degree daily (1DD), monthly product and pentad data.
We have downloaded the following products:
daily v1.3: this is available up to a three months from present date and it is the recommended daily version
monthly v2.3: which is the recommended monthly version, goes up to present date, contains some preliminary files
The GPCP One-Degree Daily Precipitation Data Set (1DD Data Set) provides daily, global 1x1-deg gridded fields of precipitation totals for October 1996 through the delayed present. The 1DD draws upon several different data sources, surface and satellite measurements, covering different areas of the globe. This product is updated sporadically, about once a month.
More information is available from the GPCP webpage. Detailed documentation is also available from the NCEI data server for v1-3 daily and v2.3 monthly. These documents are also available on the filesystem in the dataset folder.
Data download¶
We downloaded v1.3 daily and v2-3 monthly from the NCEI server, using a python based code. The code uses the requests module to download the files.
To run it:
python gpcp.py -y <year> -t <frequency>
To see all the options:
python gpcp.py --help
Weekly updates are managed via the Jenkins accessdev server.
Data location¶
We’ve downloaded GPCP data to:
/g/data/ia39/aus-ref-clim-data-nci/gpcp/data/<frequency>/<version>/<YYYY>/<files>
where <frequency> is mon or day and
<version> is v1-2 and v1-3 for daily data and v2-3 for monthly.
Files are in netcdf4 format and filenames are respectively:
gpcp_1dd_v1.2_p1d.YYYYMMDD.ncfor v1.2 daily, where the date is the represented day, for example:gpcp_1dd_v1.2_p1d.199610.ncgpcp_v01r03_daily_dYYYYMMDD_cYYYYMMDD.ncfor v1.3 daily, where the first date is the represented day and the second is the creation date for the file, for example:gpcp_v01r03_daily_d20170323_c20171211.ncgpcp_v02r03_monthly_dYYYYMMDD_cYYYYMMDD.nc, same conventions as for daily v1.3
If preliminary files are present (currently applies only to v2.3 monthly) then this is indicated in the filenames as in this example:
gpcp_v02r03-preliminary_monthly_d201908_c20190910.nc
License¶
Unknown.
Data citation¶
v1.3 daily - Adler, Robert; Wang, Jian-Jian; Sapiano, Mathew; Huffman, George; Bolvin, David; Nelkin, Eric; and NOAA CDR Program (2017). Global Precipitation Climatology Project (GPCP) Climate Data Record (CDR), Version 1.3 (Daily) [Indicate subset used.]. NOAA National Centers for Environmental Information. doi:10.7289/V5RX998Z [access date]
v2.3 monthly - Adler, Robert; Wang, Jian-Jian; Sapiano, Matthew; Huffman, George; Chiu, Long; Xie, Ping Ping; Ferraro, Ralph; Schneider, Udo; Becker, Andreas; Bolvin, David; Nelkin, Eric; Gu, Guojun; and NOAA CDR Program (2016). Global Precipitation Climatology Project (GPCP) Climate Data Record (CDR), Version 2.3 (Monthly). National Centers for Environmental Information. doi:10.7289/V56971M6 [access date]
Reference¶
Publications using this dataset should also cite the following journal article: Huffman GJ, Adler RF, Morrissey MM, Bolvin DT, Curtis S, Joyce R, McGavock B, and Susskind J (2001). Global precipitation at one-degree daily resolution from multisatellite observations. Journal of Hydrometeorolgy, 2, 36-50. https://doi.org/10.1175/1525-7541(2001)002<0036:GPAODD>2.0.CO;2
Acknowledgement¶
No statement provided.
Author note¶
Users are requested to add the official data citation as above and email their citation to george.j.huffman@nasa.gov or david.t.bolvin@nasa.gov.
Assistance¶
For assistance with GPCP data on NCI, open a new issue at https://github.com/aus-ref-clim-data-nci/GPCP/issues