Estimates of hourly-per-month Photosynthetic Active Radiation for rivers in the Contiguous United States.

This dataset contains the results of applying the StreamLight (Savoy et al. 2021) model on modified individual reaches within the NHDPlus V2 dataset for 24-hours-per-month. A description of the methods used to produce the dataset and an analysis are available in: "Water Surface Light Availability Across Rivers and Streams in the Contiguous United States" (Kobayashi et al.)