LAM activities in Austria in 2003. Yong WANG ZAMG, AUSTRIA. 25th EWGLAM and 10th SRNWP meetings, Lisbon, 6-9.10.2003. 1. Operations. In ZAMG, the spectral limited area model ALADIN is run on 2 Central European domains.
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25th EWGLAM and 10th SRNWP meetings, Lisbon, 6-9.10.2003
In ZAMG, the spectral limited area model ALADIN is run on 2 Central European domains.
ALADIN-LACE: 37 vertical levels and 12.2km horizontal resolution; coupled with ARPEGE.
ALADIN-VIENNA: 37 vertical levels and 9.6km horizontal resolution,coupled with LACE .
SGI origin 3400
Hourly model predictions and observations of areal mean precipitation for area 9. Left: during the first (6-8 Aug. 2002) flood event. Right: the second (12-14 Aug. 2002) flood event.
We have studied the MAP IOP2b case for identifying the problems of ALADIN precipitation forecast; for investigating the possibilities of improvment on the precipitation forecast over complex topography. This case is typical for heavy precipitation in the Alpine region. The ALADIN simulations with different resolutions, topographies and the tunings of the parameterization have been carried on.The performance of ALADIN over areas with different orographical charactristics and for the periods of weather evolution is also verified.
Horizontal cross section of precipitation forecasts,analysis and topography. Precipitation: 24h mean rate in mm/h from 06utc 20-21.09.1999. Forecast in red: large-scale; in black: convective. Observation in solid line: ETH in 25km resolution; in red: radar analysis.
Temporal evolution of the hourly areal mean precipitation forecast. Balck: radar analysis; red: Meso-NH; blue: coupled with forecast; green: coupled with the analysis. Time: 00utc 19.09.1999 -- 06utc 21.09.1999.
ZAMG issues a bi-annual verification report which shows forecast errors of different models (ALADIN, ECMWF, statistical models) in comparison, over an extended period. It is available as pdf document from ZAMG’s homepage www.zamg.ac.at.
Verification statistics are the variable including T2m, 10m Wind, cloud amount, precipitation,Tmax and Tmin for the 9 major Austrian cities; and the forecast skill of 500hPa geopotential of ALADIN-VIENNA