The interaction of processes at the soil vegetation-atmospheric boundary layer (ABL) interface are crucial for the understanding of weather and climate including extremes such as heavy precipitation and droughts. For this purpose, the exchange of momentum, water, energy, and carbon at this interface has to be understood and modeled as accurately as possible. Particularly, the impact of soil moisture, evapotranspiration on the diurnal cycle of the ABL, clouds, and precipitation remains a sore gap in our understanding of weather processes and climate statistics. In this session, we accept observational and modeling approaches to address these challenges. With respect to the observations, emphasis is put on the application of new sensor synergies, e.g., using active remote sensing for studying land surface exchange processes and entrainment at the ABL top. With respect to theoretical understanding and modeling, we are focusing on new insights by feedback diagrams and grey zone experiments down to the large eddy simulation scale.