Analyzing SAR for Biomass Sensitivity and Ecosystem Dynamics in Tropical Forests of Southeast Asia

Abstract

Employing the radar for biomass studies in Southeast Asian tropical forests, we find that the relationship betweenthe L-band SAR and biomass is quite encouraging. But this relationship is non-linear and influenced by thegeometry of the tree and surface characteristics. The MIMICS model, based on radiative transfer equation, isemployed to have a better understanding of the radar-vegetation interaction in these forests. Simulations give abetter idea of the influence of the vegetation, surface and sensor characteristics on radar scattering and wouldfacilitate the selection of optimum parameters for biomass retrieval. Further, two important phenomena, i.e.deforestation and inundation mapping, where SAR could have operational applications are studied in theCentral Kalimantan forests. Both the phenomena could be captured well and the generated data would serveas valuable information for the Vegetation Ecosystem Dynamics Models that simulate the exchange of carbondioxide and trace gases between the lithosphere and atmosphere