Numerical Modelling of the Extratropical Storm Delta Over Canary Islands: Importance of High Resolution - Selected Topics of Computational and Experimental Fluid Mechanics - page 136

The boundary conditions (BC) are known to provide a basic limitation to the
predictability of local area models (Warner et al. 1997 ). Several errors produced on
BC are mainly propagated into the domain at advective speeds by the mean flow,
so in order to minimize these effects in our interest area, the mother domain has
been dimensioned by considering HYSPLIT (Draxler and Rolph 2003 ) backward
trajectories results (not shown) with the destination centred in the Canary Islands
(28 ◦ N16 ◦ W) at several levels in the 48h model simulation run.
3 Numerical Solution and Results
The numerical simulations for November 28 (Fig. 3 a, b) show a mature cyclone
with a warm front extending from the centre of the low north-westward following
the cyclone shape as shown by absolute vorticity. The structure of the extratropical
Fig. 3 a , b Simulated 850hPa potential temperature, winds and absolute vorticity for November
28-29 2005 from 9km domain; c , d 10m wind field from 1km domain