Abstract
Different PBL and mycrophysics schemes in WRF model are compared for a small island in Antarctic with a geothermally active lake in its interior. Data collected by a micrometeorological tower are compared to the simulations for 3 days with distinct meteorological conditions: low cloudiness, clear sky and the passage of a cyclone over the island. For air temperature, the different experiments produced a daily cycle with smaller amplitude than in observations. The variability among schemes was less than 1 °C, mostly because of SST influence and their different capabilities of solving cloudiness. For the clear sky day, the short wave radiation forecast is largely dependent on the mycrophysics scheme used and not as much on the PBL ones, but for long wave radiation the schemes produced similar results. But when there is a cyclone acting, THOMPSON mycrophysics scheme performs better than WSM3. For the zonal wind, the variability among PBL schemes is generally larger (1-3 m/s) than among the mycrophysics ones (less than 1 m/s). WSM3 scheme is generally better suited for forecasts in cyclone days. For the meridional wind component, there is little difference among mycrophysics and PBL schemes.
Keywords:
WRF; Deception Island; planetary boundary layer and microphysics schemes
