Space‐Scale Resolved Surface Fluxes Across a Heterogeneous, Mid‐Latitude Forested Landscape

The Earth's surface is heterogeneous at multiple scales owing to spatial variability in various properties. atmospheric responses these heterogeneities through fluxes of energy, water, carbon, and other scalars are scale-dependent nonlinear. Although exchanges can be measured using the eddy covariance technique, widely used tower-based measurement approaches suffer from spectral losses lower frequencies when typical averaging times. However, spatially resolved measurements such as airborne detect larger scale (meso-β, meso-γ) transport. To evaluate prevalence magnitude flux contributions, we applied wavelet analysis over a mid-latitude forested landscape, interspersed with open water bodies wetlands. were made during Chequamegon Heterogeneous Ecosystem Energy-balance Study Enabled by High-density Extensive Array Detectors intensive field campaign. We ask, how do surface-atmosphere vary surfaces across day seasons? Measured separated into smaller-scale turbulent larger-scale mesoscale contributions. found significant contributions sensible latent heat summer autumn which would not single-point tower traditional time-domain half-hourly Reynolds decomposition. report scale-resolved transitions associated seasonal diurnal changes study domain. This adds our understanding surface-atmospheric interactions unstructured help inform multi-scale model-data integration weather climate models sub-grid scale.