Simulation data provenance: Dataset generated at NCAR using the NCAR Large Eddy Simulation code
See README-SABL2048.pdf for more details✪ Large Eddy Simulation (LES) of stably stratified atmospheric boundary layer in a domain of size (400m, 400m, 400m), using 20483 mesh and mesh spacing of about 20cm in each direction.
✪ Simulations use mixed spectral methods in horizontal planes and second order finite differencing in the vertical (z) direction.
✪ Subfilter-scale fluxes are parameterized using the eddy-viscosity model that uses a prognostic subfilter kinetic energy transport equation and the two-part SFS model of Sullivan et al. (1994).
✪ Flow is driven by a geostrophic wind of magnitude Ug=8 m/s.
✪ Bottom boundary is a rough surface with standard MOST parameterization and roughness length z0=0.1m.
✪ Constant cooling rates are applied at the ground surface: Cr = 0.25 K/hr for the regular cooling rate and Cr = 1.0 K/hr for the strong cooling rate case.
✪ Resulting friction velocities for the regular and strong cooling rates are u*=0.25 m/s and u*=0.177 m/s, respectively.
✪ Resulting boundary layer heights for the regular and strong cooling rates are h~187 m and h~143 m, respectively.
✪ Two datasets are available for each cooling rate case: time-resolved during a relatively short period of time consisting of 100 time-steps (high-frequency dataset name = “sabl2048high”), and 20 statistically independent snapshots (low-frequency dataset name = “sabl2048low”), and similarly for the strong cooling rate (“stsabl2048high” and “stsabl2048low”).