The Biosphere Research Topic aims to integrate and use forest (structure) parameters derived from radar remote sensing techniques in monitoring the state and the properties of global forests with a particular focus on biological properties. This question will be examined on different levels: from the estimation of forest parameters from the radar data sets; to secondary biological indicators that can be derived from these parameters, the complementarity to optical/hyperspectral data and parameters up to vegetation model predictions that extrapolate forest dynamic in space and time. The most important goal of this work package is gaining a better understanding of the following scientific questions: