Upwelling Irradiance below Sea Ice—PAR Intensities and Spectral Distributions New publication by Lars Chresten Lund-Hansen, Michael Bjerg-Nielsen, Tanja Stratmann, Ian Hawes, and Brian K. Sorrell 20 September 2021 by Peter Schmidt Mikkelsen Abstract: See: https:// doi.org/10.3390/jmse9080830