The variability and seasonality in the ratio of photosynthetically active radiation to solar radiation: A simple empirical model of the ratio. - Tomoko Akitsu; Kenlo Nishida Nasahara; Osamu Ijima; Yasuo Hirose; Reiko Ide; Kentaro Takagi; Atsushi Kume (Int. J. Appl. Earth Obs. Geoinformation, 2022)

Introducing the spectral characteristics index: A novel method for clustering solar radiation fluctuations from a plant-ecophysiological perspective. - Amila Nuwan Siriwardana; Atsushi Kume (Ecol. Informatics, 2025)