The Terrestrial Precipitation Analysis Packages provides tools for users to determine the historical, current, and future climate profile for any given terrestrial location. See Lemoine et al. (2016) for a full description of each tool, including use, format, and underlying data.
The Precipitation Manipulation Tool allows users to input annual or monthly precipitation records to determine the rainfall reduction or addition needed to achieve a desired extreme event. Users without 100 years of data are able to use this tool; however estimates of extreme tails (e.g. 1% quantiles) are biased with small sample sizes. The tool also allows for monthly calculations if users have monthly data.
The Precipitation Attributes Tool provides summary statistics of long-term trends and future projections. Users can retrieve mean annual precipitation, precipitation of the warmest quarter, and precipitation of the wettest quarter derived from WorldClim at 10 arc-minute resolution. Future projections of these variables under weak (RCP4.5), moderate (RCP6.0), and severe (RCP8.5) climate change are also available. The tool also provides extreme measures of precipitation, including the 1%, 5%, and 10% quantiles at 0.5 degree resolution.
The Precipitation Trends Tool provides time-series of annual precipitation, potential evapotranspiration (PET), and the standardized precipitation-evapotranspiration index (SPEI) for any terrestrial location. This tool uses gridded datasets based on the CRU TS3.22 model at 0.5 degree resolution.