Simple Process-Led Algorithms for Simulating Habitats.
SPLASH: Simple Process-Led Algorithms for Simulating Habitats 
This program calculates bioclimatic indices and fluxes (radiation, evapotranspiration, soil moisture) for use in studies of ecosystem function, species distribution, and vegetation dynamics under changing climate scenarios. Predictions are based on a minimum of required inputs: latitude, precipitation, air temperature, and cloudiness.
Installation
You can install the released version of splash from CRAN with:
install.packages("splash")
And the development version from GitHub with:
# install.packages("devtools")
devtools::install_github("villegar/splash")
Reference
T. W. Davis, I. C. Prentice, B. D. Stocker, R. J. Whitley, H. Wang, B. J. Evans, A. V. Gallego-Sala, M. T. Sykes, and W. Cramer, Simple process-led algorithms for simulating habitats (SPLASH): Robust indices of radiation evapo-transpiration and plant-available moisture, Geoscientific Model Development, 2016. DOI: https://doi.org/10.5281/zenodo.376293