“…Local surface fluxes and their response to frontal weather may contribute to the size of the contrast if such response is large enough (Chan et al.,
2004). In winter, much of the biosphere is inert, and hence respiration dominates NEE, which is less spatially diverse over CONUS in winter (Gourdji et al.,
2022; Hu et al.,
2020). However, in the summer,
is depleted over productive regions in the boundary layer and, to a lesser extent, the total column.…”