Fig. 3: Validation of modeled carbon fluxes and carbon pools.
From: Local-scale Arctic tundra heterogeneity affects regional-scale carbon dynamics
Monthly net ecosystem exchange (NEE) fluxes measured by the CARVE eddy covariance tower (71°19’22.72”N, 156°35’47.74”W, a) during 2011–2015, were compared with NEE fluxes simulated with DOS-TEM (dashed line in b). Negative NEE indicates carbon uptake, while positive NEE indicates loss. Footprint % indicates the accumulated percentage of measured NEE used to compare with modeled NEE, weighted by polygonal landform (DS drained slope, HC high center, FC flat center, LC low center, nDTLB nonpatterned drained thaw lake basins) using the Kormann and Meixner93 flux footprint model (e.g., a). Modeled carbon pools (colored circles; c) were compared to 44 pedons collected (solid gray circles with standard error bars) and validated against 11 independent random subset of soil carbon pedons (open circles) measured on each respective landform across the Barrow Peninsula.
