手法を比較

	バルク空力フラックス	渦相関法	HYSPLIT	Monin-Obukhov Similarity Theory
分野	気象学	気象学	気象学	気象学
系統	Process / pipeline	Process / pipeline	Process / pipeline	Process / pipeline
提唱年	1981	1951	1997	1954
提唱者	Large and Pond	Swinbank	Draxler and Hess	Monin and Obukhov
種類	Surface flux estimation method	Micrometeorological flux measurement	Trajectory and dispersion model	Similarity scaling framework
原典	Large, W. G., & Pond, S. (1981). Open ocean momentum flux measurements in moderate to strong winds. Journal of Physical Oceanography, 11(3), 324-336.	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.	Draxler, R. R., & Hess, G. D. (1997). Description of the HYSPLIT_4 modeling system. NOAA Technical Memorandum ERL ARL-224.	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.
別名	Bulk aerodynamic approach, Bulk flux parametrization, Aerodynamic bulk method	Eddy covariance, EC flux, Eddy correlation, Direct flux measurement	HYSPLIT, Hybrid Single-Particle, Lagrangian trajectory model	Monin-Obukhov, Similarity theory, Monin-Obukhov length scale
関連	3	3	3	3
概要	The bulk aerodynamic method estimates surface energy and momentum fluxes from standard meteorological observations. Rather than measuring turbulent fluxes directly, it parameterizes them using measurements of wind speed, temperature, and moisture at a reference height (typically 10 m) and surface conditions, multiplied by empirically derived drag and transfer coefficients.	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.	HYSPLIT (Hybrid Single-Particle Lagrangian Integrated Trajectory Model) is a widely used atmospheric transport and dispersion model developed by NOAA's Air Resources Laboratory. It computes air parcel trajectories and pollutant dispersion using Lagrangian tracking to simulate how contaminants and particles move through the atmosphere over hours to weeks.	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.