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Zentralanstalt für Meteorologie und Geodynamik ALARO-0 at ZAMG Experiences, verification, identified problems, …. Christoph Wittmann.

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Presentation on theme: "Zentralanstalt für Meteorologie und Geodynamik ALARO-0 at ZAMG Experiences, verification, identified problems, …. Christoph Wittmann."— Presentation transcript:

1 Zentralanstalt für Meteorologie und Geodynamik ALARO-0 at ZAMG Experiences, verification, identified problems, …. Christoph Wittmann

2 Zentralanstalt für Meteorologie und Geodynamik Content Use of ALARO in operational applications at ZAMG Experiences / verification / identified problems Precipitation Low Stratus Temperature Planning with ALARO-X at ZAMG

3 Zentralanstalt für Meteorologie und Geodynamik History Short history: 09/2007ALARO-0 (minus 3MT) operational (9.6km) 04/2009full ALARO-0 operational (9.6km) 05/2009start of daily ALARO-0 4.8km run (00 UTC) 2010verification, tests, etc. 06/2010 implementation of CANARI surface assimilation 09/2010ALARO-0 4.8km coupled to IFS 10/2010name for model version: ALARO5-AUSTRIA 01/2011ALARO5-AUSTRIA running 4 times / day 03/2011ALARO5-AUSTRIA announced as operational model at ZAMG 09/2012 (?)NEC-SX8R switched off at ZAMG = end of 9.6km ALARO-0 version

4 Zentralanstalt für Meteorologie und Geodynamik Implementation of ALARO at ZAMG Operational model at ZAMG: ALARO5-AUSTRIA resolution: 4.8km / 60L runs: 00 / 06 / 12 / 18h forecast range:72h oro./grid: mean / linear time step: 180s initialization:IFS (3D) CANARI (2D) physics: ALARO-0, SK scheme dynamics:hydrostatic availability:4 hours after init time

5 Zentralanstalt für Meteorologie und Geodynamik ALADIN-LAEF operational + upgrade settings Ensemble size16+1 Horizontal resolution18 km / 11 km Vertical resolution37 layer / 45 layer Runs/Day2 (00, 12 UTC) Forecast range60 h / 72h Output-Frequency1h Model time step720s / 400s Coupling-Model (time-lagged) ECMWF-EPS (SV Vectors, first 16 members) Coupling-Update6h

6 Zentralanstalt für Meteorologie und Geodynamik Multiphysics Targets on: Microphysics Convection (shallow + deep), Turbulence Cellular automaton approach included (2 members) Radiation (radiative cloud condensate) Screening level diagnostics (T2m, RH2m, 10m gusts) … never ending story (ideas+input needed …) TOUCANS and other new developments are always welcome New version brings nice improvements (esp. skill scores for precip.) ALARO physics ALADIN-Fr physics

7 Zentralanstalt für Meteorologie und Geodynamik Content Use of ALARO in operational applications at ZAMG Experiences / verification / identified problems Precipitation Low Stratus Temperature Planning with ALARO-X at ZAMG,…

8 Zentralanstalt für Meteorologie und Geodynamik Precipitation Experiences/Feedback triggering of convection over orography too early (nothing new) overestimation of (severe) convective precipitation over orography underestimation of (stratiform) precipitation over flatland areas (e.g. northeastern part of Austria) E-SUITE launched end of April (using retuned microphysics, work by Radmila), should become operational within next weeks: Nice improvements for 2 of the 3 mentioned points …

9 Zentralanstalt für Meteorologie und Geodynamik Winter case I winter case: frontal zone approaching alps ALARO 6.5kmALARO 4.8kmALARO 9.6km IFSCOSMO-EU

10 Zentralanstalt für Meteorologie und Geodynamik Winter case II winter case: frontal zone approaching alps

11 Zentralanstalt für Meteorologie und Geodynamik Summer case II

12 Zentralanstalt für Meteorologie und Geodynamik Triggering of convection

13 Zentralanstalt für Meteorologie und Geodynamik Triggering of convection (COSMO vs. ALARO)

14 Zentralanstalt für Meteorologie und Geodynamik Severe convection I reports from regional centers in the south of Austria: overestimation of severe convection

15 Zentralanstalt für Meteorologie und Geodynamik Severe convection II

16 Zentralanstalt für Meteorologie und Geodynamik Severe convection III

17 Zentralanstalt für Meteorologie und Geodynamik Verification

18 Zentralanstalt für Meteorologie und Geodynamik Low stratus Experiences/Feedback: ALARO5-AUSTRIA with better performance than IFS, COSMO(-EU) …. but just when using empirical subinversion scheme (SK) In flatland areas performance is quite good stratus in resolved valleys and basins still not sufficiently predicted 02/11/2013 ALARO-1 Working days

19 Zentralanstalt für Meteorologie und Geodynamik Beispiel Hochnebel I 02/11/2013 Synoptikertreffen IFS ALARO5 ALARO10 MSG VIS

20 Zentralanstalt für Meteorologie und Geodynamik 02/11/2013 Synoptikertreffen

21 Zentralanstalt für Meteorologie und Geodynamik Verification low stratus Vienna

22 Zentralanstalt für Meteorologie und Geodynamik Temperatures Experiences/feedback: Current PBL / SBL / surface representation with problems create a mixed layer in winter time (cold daytime bias) general cold daytime bias during summer best performance during spring / autumn better performance during night 02/11/2013 ALARO-1 Working days

23 Zentralanstalt für Meteorologie und Geodynamik Temperature 02/11/2013 ALARO-1 Working days

24 Zentralanstalt für Meteorologie und Geodynamik 2m temperature verification Vienna time series 00+27h AE/BIAS ALARO time series 00+36h AE/BIAS ALARO during nightduring day

25 Zentralanstalt für Meteorologie und Geodynamik Content Use of ALARO in operational applications at ZAMG Experiences / verification / identified problems Precipitation Low Stratus Temperature Gusts Planning with ALARO-X at ZAMG, …

26 Zentralanstalt für Meteorologie und Geodynamik Plans with ALARO at ZAMG Current priority: AROME-AUSTRIA (2.5 km) … plan: operational in 2013 Migration NEC -> SGI Beside that: Ready for tests with new ALARO-1 developments Stratus (SK scheme vs. TOUCANS?) Wind gusts AROME 2.5km vs. ALARO 5 km Continue work on multiphysics for LAEF Continue work on stochastic physics for LAEF Soon: AROME 1km, ALARO 1km ?

27 Zentralanstalt für Meteorologie und Geodynamik Input for discussions Most important topics to be handled (as seen from ZAMG): Triggering of convection Intensity of convective precipitation Missing (weak) stratiform events Stratus in valleys, basins Cold daytime bias Wind+Gusts (10m+100m) … some of that already solved with ALARO-1?

28 Zentralanstalt für Meteorologie und Geodynamik 02/11/2013 ALARO-1 Working days SGI ICE X After almost 1 year of delay … … a new HPC is waiting at ZAMG for more complex physics, higher resolution, … … ready for work in few month (after migration work )


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