Estimating landscape-scale vegetation carbon stocks using airborne multi-frequency polarimetric synthetic aperture radar (SAR) in the savannahs of north Australia

摘要: This study investigates the use of polarimetric AirSAR (TopSAR) data for estimating biomass and carbon storage Eucalyptus miniata (Darwin Woolly Butt) E. tetrodonta (Stringybark) dominated open-forest savannah in Northern Territory, Australia. Radar backscatter intensity was correlated with basal area 30 plots within Wildman River Reserve, Territory. Published allometric relationships were used to convert tree estimates above-ground each measured plots. Below-ground also estimated these plots, using additional published between below-ground biomass. Backscatter L-HV channel had highest regression co-efficient (r2 = 0.92) ground-based measurements. Using a linear equation versus gave mean 94 t DM (dry mass) ha-1 eucalypt vegetation equivalent 47 t C ha-1 stored this pool. Estimated 28 t C ha-1, giving total ecosystem 75 t C ha-1. The results indicate that SAR is best suited model tropical savannahs northern Given vast spatial extent woodlands across north Australia, has potential be major tool stock assessment, critical accounting, as well contribute gaining better understanding role Australia play biochemical cycles