Over the last two decades advances in micrometeorological theory and techniques have led to new understanding of the processes governing energy and mass exchange at the Earth-Atmosphere interface. Such advances have been critical for shaping environmental policies and improving models used for weather and air quality forecasting, agricultural management, urban planning, and simulating future climate. This session will focus on state-of-the-art micrometeorological field studies that are providing novel and practical insights regarding energy, water, biogeochemical cycling of greenhouse gases and aerosols over natural, managed, and urban ecosystems.  Contributions that highlight the use of novel experimental results to inform land surface model development will also be encouraged.