alaro-0 at zamg experiences, verification, identified problems, …
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ALARO-0 at ZAMG Experiences, verification, identified problems, …. Christoph Wittmann. Content. Use of ALARO in operational applications at ZAMG Experiences / verification / identified problems Precipitation Low Stratus Temperature Planning with ALARO-X at ZAMG. History. Short history: - PowerPoint PPT PresentationTRANSCRIPT
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ALARO-0 at ZAMGExperiences, verification, identified problems, ….
Christoph Wittmann
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Content
Use of ALARO in operational applications at ZAMG
Experiences / verification / identified problems Precipitation Low Stratus Temperature
Planning with ALARO-X at ZAMG
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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) 2010 verification, 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
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Implementation of ALARO at ZAMG
Operational model at ZAMG:
“ALARO5-AUSTRIA”
resolution: 4.8km / 60L runs: 00 / 06 / 12 / 18hforecast range: 72horo./grid: mean / lineartime step: 180sinitialization: IFS (3D)
CANARI (2D)physics: ALARO-0, SK schemedynamics: hydrostaticavailability: 4 hours after init time
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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
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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 bringsnice improvements (esp. skill scores for precip.)
ALARO physicsALADIN-Fr physics
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Content
Use of ALARO in operational applications at ZAMG
Experiences / verification / identified problems Precipitation Low Stratus Temperature
Planning with ALARO-X at ZAMG,…
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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 …
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Winter case I
winter case: frontal zone approaching alps
ALARO 6.5km ALARO 4.8km ALARO 9.6km
IFS COSMO-EU
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Winter case II
winter case: frontal zone approaching alps
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Summer case II
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Triggering of convection
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Triggering of convection (COSMO vs. ALARO)
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Severe convection I
reports from regional centers in the south of Austria:overestimation of severe convection
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Severe convection II
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Severe convection III
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Verification
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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
21/04/23ALARO-1 Working days
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Beispiel Hochnebel I 21/04/23Synoptikertreffen
IFS ALARO5
ALARO10 MSG VIS
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21/04/23Synoptikertreffen
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Verification low stratus Vienna
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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
21/04/23ALARO-1 Working days
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Temperature 21/04/23ALARO-1 Working days
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2m temperature verification Vienna
time series 00+27h AE/BIAS ALARO
time series 00+36h AE/BIAS ALARO
during night during day
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Content
Use of ALARO in operational applications at ZAMG
Experiences / verification / identified problems Precipitation Low Stratus Temperature Gusts
Planning with ALARO-X at ZAMG, …
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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 ?
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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?
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21/04/23ALARO-1 Working daysSGI ICE X
After almost 1 year of delay …
… a new HPC is waiting at ZAMG for morecomplex physics, higherresolution, …
… ready for work in few month(after migration work )