Integrating continuous atmospheric boundary layer and tower-based flux measurements to advance understanding of land-atmosphere interactions

•Atmospheric boundary layer observations at flux tower sites open new research opportunities.•ABL observations help interpreting land-atmosphere feedbacks.•Quality control of eddy covariance fluxes can be enhanced.•ABL observations link flux tower observations to regional-scale flux upscaling.•Quantifying land-atmosphere coupling at flux tower sites requires ABL observations.