photobiology 0.10.7

The package documentation web site at includes a changelog with information for each release since version 0.1.0.

This release includes enhancements related to the computations of reference evapotranspiration:

Changes from version 0.10.6 the most recent CRAN release, are:

  • Add function ET_ref() for computation of reference
    evapotranspiration, implementing the original FAO56 formulation of the Penman-Monteith method as well as modified in 2005 for tall and short vegetation according to ASCE-EWRI. The formulation is that for ET expressed in mm/h, but modified to use as input flux rates in W/m2 and pressures expressed in Pa.
  • Add function net_radiation() that computes the long wave net radiation balance if downwelling long wave radiation is available and otherwise estimates it.
  • Add function irrad_extraterrestrial() that computes down-welling solar irradiance on a horizontal plane at the top of the atmosphere based on the Sun to Earth distance.
  • Revise function sun_angles() to also return the Sun to Earth distance.

NOTE: The updated package is on its way to CRAN.

Please raise issues concerning bugs or enhancements to this package through GitHub at