A one-point measurement of net radiation is typically not representative of radiative energy available for the turbulent exchange of latent and sensible heat at eddy-covariance sites with heterogeneous surface cover. We propose a methodology for providing surface-cover-corrected net radiation matching the footprint of turbulent fluxes at a heterogenous eddy-covariance site. This is demonstrated at a complex sub-alpine site in southern central Norway over a week. The methodology is assessed by comparing the energy balance closure calculated with the regular one-point net radiation measurement at the flux tower against the surface-cover-corrected net radiation. The assessment indicates a decrease in the energy imbalance by 8% when assessed with the energy balance ratio, but no improvement is revealed when assessed with regression methods. However, only a small dataset serves as basis for this demonstration, and the findings therefore cannot necessarily be generalized. Further testing and application of the methodology is required to understand the full effect of surface-cover-correcting mismatching footprints of turbulent fluxes and net radiation at heterogeneous eddy-covariance sites.

净辐射的单点测量通常不代表可用于在具有异质表面覆盖的涡协方差位点进行潜热和显热的湍流交换的辐射能。我们提出了一种方法，用于提供与异质涡度协方差站点的湍流通量足迹相匹配的表面覆盖校正净辐射。这在挪威中南部的一个复杂的亚高山地区进行了一周的演示。该方法通过比较在通量塔处使用常规单点净辐射测量计算的能量平衡闭合值与表面覆盖校正的净辐射进行评估。用能量平衡比评估时，评估表明能量不平衡减少了 8%，但用回归方法评估时没有发现改善。然而，只有一个小数据集作为该演示的基础，因此不一定能概括研究结果。需要对该方法进行进一步的测试和应用，以了解表面覆盖校正在异质涡度协方差位点的湍流通量和净辐射的不匹配足迹的全部影响。