The researchers studied how vegetation density affects the estimation of heat fluxes over hilly prairie. They used satellite data and on-site measurements to calculate heat fluxes, focusing on the roughness of the surface. By comparing different methods, they found a good correlation between measured and estimated roughness values. Using this parameterization, they accurately calculated sensible heat fluxes under specific weather conditions. The comparison between calculated and measured heat fluxes showed a strong agreement, indicating the effectiveness of their approach.