R package to calculate the light reaching the ocean sea floor. Further information is available in the following paper:
Gattuso J.-P., Gentili B., Antoine D. & Doxaran D., 2020. Global distribution of photosynthetically available radiation on the seafloor. Earth System Science Data 12:1697-1709. http://dx.doi.org/10.5194/essd-12-1697-2020