"flux measurements" refers to the process of measuring the flow or movement of something, like heat, gases, or particles, through a specific area or boundary. Full definition
A new analysis of atmospheric data and flux measurements presented in this paper argues, in fact, for the opposite. (f1000.com)
The Eddy Correlation Flux Measurement system provides in situ, 30 - minute measurements of the surface turbulent fluxes of momentum, sensible heat, latent heat, and carbon dioxide. (arm.gov)
Atmospheric and boundary state systems, including surface meteorological instrumentation, boundary layer cloud system, total sky imager, weighing bucket rain gauge, total precipitation sensor, eddy correlation flux measurement system, and disdrometer (arm.gov)