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	WRF-modellen	Eddy Covariance	Monin-Obukhovs likhetsteori
Ämnesområde	Meteorologi	Meteorologi	Meteorologi
Familj	Process / pipeline	Process / pipeline	Process / pipeline
Ursprungsår	2000	1951	1954
Upphovsperson	Skamarock and Klemp	Swinbank	Monin and Obukhov
Typ	Atmospheric simulation system	Micrometeorological flux measurement	Similarity scaling framework
Ursprungskälla	Skamarock, W. C., Klemp, J. B., Dudhia, J., et al. (2008). A Description of the Advanced Research WRF Version 3. NCAR Technical Note NCAR/TN-475+STR.	Baldocchi, D. (2003). Assessing the eddy covariance technique for evaluating carbon dioxide fluxes of ecosystems: past, present and future. Global Change Biology, 9(4), 479-492.	Monin, A. S., & Obukhov, A. M. (1954). Basic laws of turbulent mixing in the ground layer of the atmosphere. Tr. Akad. Nauk SSSR, 24, 163-187.
Alias	Weather Research and Forecasting, WRF, ARW, NMM	Eddy covariance, EC flux, Eddy correlation, Direct flux measurement	Monin-Obukhov, Similarity theory, Monin-Obukhov length scale
Närliggande	4	3	3
Sammanfattning	The Weather Research and Forecasting (WRF) model is a mesoscale atmospheric simulation system used for weather forecasting, research, and climate applications. Developed cooperatively by NCAR, NOAA, and academic institutions, WRF became operational in 2004 and has become one of the most widely used atmospheric models worldwide.	The eddy covariance method is a direct, micrometeorological technique that measures turbulent fluxes of momentum, heat, water vapor, and CO2 by computing the covariance between high-frequency fluctuations of wind velocity and scalar properties (temperature, humidity, concentration). It is the gold standard for measuring ecosystem-atmosphere exchanges and validating model parameterizations.	Monin-Obukhov similarity theory is a fundamental framework in boundary layer meteorology that describes how wind speed, temperature, and humidity vary with height near the surface. Published in 1954, it shows that normalized vertical profiles depend on a single dimensionless parameter—the Monin-Obukhov stability parameter—which quantifies the balance between mechanical turbulence and buoyant convection.