- DOI for Scientific and Technical Data
10.5676/DWD_GPCC/ITD_M_V1_100

- Subtitle
Gridded Monthly Precipitation Totals based on GHCN Monthly Totals interpolated by means of GPCC's modified SPHEREMAP

- Citation
For 1.0° grid resolution:
Finger, Peter; Ziese, Markus; Meyer-Christoffer, Anja; Schneider, Udo; Becker, Andreas (2015): GPCC Interpolation Test Dataset (ITD) at 1.0° DOI: 10.5676/DWD_GPCC/ITD_M_V1_100

- Creators
Finger, Peter; Ziese, Markus; Meyer-Christoffer, Anja; Schneider, Udo; Becker, Andreas

- Publisher
Global Precipitation Climatology Centre (GPCC, http://gpcc.dwd.de/) at Deutscher Wetterdienst (DWD)

- Publication Year
2015

- Summary
The GPCC Interpolation Test Dataset (ITD) was created to provide open precipitation data for users to compare their interpolation results with the GPCC interpolation procedure. Depart from the operational interpolation of anomalies, monthly precipitation totals were interpolated, because the necessary long term means to compute the anomalies could not be provided. As described in Becker et al. (2013), the interpolation was done at a finer subgrid and subsequent area and land portion weighting. Only (aggregated) monthly precipitation totals from the GHCN dataset (e.g., Menne et al., 2012) were used as input data. These data are additionally quality controlled by GPCC and can be different to the original GHCN data. Station coordinates were extracted from the GPCC data base and can therefore differ from the original GHCN coordinates. Within this dataset, gridded monthly precipitation totals for 1988, as NetCDF archive, and the underlying station data, as ASCII file with longitude, latitude and precipitation total, are provided. This dataset is applicable for the comparison of interpolation schemes, but not for hydrological or climatological analyses!

For hydrological and climatological investigations, the user is refered to this GPCC products (if several resolutions are available, the DOI for 1.0° is provided): Climatology (DOI: 10.5676/DWD_GPCC/CLIM_M_V2015_100), Full Data Reanalysis (DOI: 10.5676/DWD_GPCC/FD_M_V7_100), Full Data Daily (DOI: 10.5676/DWD_GPCC/FD_D_V1_100 ), Monitoring Product (DOI: 10.5676/DWD_GPCC/MP_M_V5_100), First Guess (DOI: 10.5676/DWD_GPCC/FG_M_100), First Guess Daily (DOI: 10.5676/DWD_GPCC/FG_D_100), and GPCC Drought Index (DOI: 10.5676/DWD_GPCC/DI_M_100).

References:
Becker et al., 2013, A description of the global land-surface precipitation data products of the Global Precipitation Climatology Centre with sample applications including centennial (trend) analysis from 1901-present, Earth System Science Data, Vol. 5, p. 71-99, DOI:10.5194/essd-5-71-2013
Menne et al., 2012, An overview of the Global Historical Climatology Network-Daily Database, Journal of Atmospheric and Oceanic Technology, Vol. 29, p. 897-910, DOI:10.1175/JTECH-D-11-00103.1

- Temporal Coverage
1988/01 - 1988/12

- Spatial Coverage
Latitude: -90.0 to 90.0; Longitude: -180.0 to 180.0

- Data Format
Gridded fields: gzip compressed NetCDF archive (classic) wikipedia.org
Station data: gzip compressed ASCII files with three columns (longitude, latitude, precipitation total)
(1 NetCDF archive and 12 ASCII files)

- Tools
List of Software for Manipulating or Displaying NetCDF Data show list
Panoply netCDF, HDF and GRIB Data Viewer Panoply Home
Climate Data Operators CDO CDO Home
NOAA's Weather and Climate Toolkit WCT Home

- Metadata ISO 19115:2003/19139:2007

- Datasize
~ 755 KB per gzip compressed NetCDF archive
~ 165 KB per gzip compressed ASCII file