1. ALARO-0 at ZAMG Experiences, verification, identified problems, ….
Christoph Wittmann

2. Use of ALARO in operational applications at ZAMG
Content
Use of ALARO in operational applications at ZAMG
Experiences / verification / identified problems
Precipitation
Low Stratus
Temperature
Planning with ALARO-X at ZAMG

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

4. 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. ALADIN-LAEF operational + upgrade settings
Ensemble size
16+1
Horizontal resolution
18 km / 11 km
Vertical resolution
37 layer / 45 layer
Runs/Day
2 (00, 12 UTC)
Forecast range
60 h / 72h
Output-Frequency 1h
Model time step
720s / 400s
Coupling-Model (time-lagged)
ECMWF-EPS (SV Vectors, first 16 members)
Coupling-Update 6h

6. Multiphysics
New version brings
nice improvements
(esp. skill scores for
precip.)
ALARO physics
ALADIN-Fr physics
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 

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

8. 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. Winter case I winter case: frontal zone approaching alps ALARO 6.5km
IFS
COSMO-EU

10. Winter case II
winter case: frontal zone approaching alps

11. Summer case II

12. Triggering of convection

13. Triggering of convection (COSMO vs. ALARO)

14. Severe convection I
reports from regional centers in the south of Austria:
overestimation of severe convection

15. Severe convection II

16. Severe convection III

17. Verification

18. Low stratus Experiences/Feedback:
ALARO-1 Working days
21/03/2017
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

19. Beispiel Hochnebel I ALARO5 IFS ALARO10 MSG VIS Synoptikertreffen
21/03/2017
ALARO5
IFS
ALARO10
MSG VIS

20. Synoptikertreffen
21/03/2017

21. Verification low stratus Vienna

22. Temperatures Experiences/feedback:
ALARO-1 Working days
21/03/2017
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

23. Temperature
ALARO-1 Working days
21/03/2017

24. 2m temperature verification Vienna
during night
during day
time series 00+27h AE/BIAS ALARO
time series 00+36h AE/BIAS ALARO

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

26. 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. 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. After almost 1 year of delay … … a new HPC is waiting at ZAMG for more
SGI ICE X
ALARO-1 Working days
21/03/2017
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 ) 28