![Page 1: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/1.jpg)
LES simulations with ICON:
the HD(CP)2 project
Daniel Klocke
![Page 2: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/2.jpg)
• German wide BMBF funded project.
• HD(CP)2 will strive to build and use a model capable of very high-resolution simulations.
• Horizontal grid spacing of 100m over domains of 1000km, offers the possibility to leap over
the so-called grey-zone encompassing most of the scales of parameterized physics.
• Semi-empirical basis for advancing parameterization development.
• Three modules:
• Model development
• Observations
• Synthesis
hdcp2.zmaw.de
![Page 3: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/3.jpg)
HDCP2 domains
Jülich
![Page 4: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/4.jpg)
4 http://hdcp2.eu/HOPE.2306.0.html
![Page 5: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/5.jpg)
3D Turbulence scheme:
Classical Smagorinsky turbulence with stability correction due to Lilly 1962.
Fully 3D.
Horizontal momentum diffusion is applied on VN (edge normal velocity) and not on U and V
like the existing turbulence scheme.
Vertical momentum is diffused through W.
Temperature diffusion is applied on potential temperature.
Tracer diffusion is performed on QV and QC, but others can be included.
Anurag Dipankar, MPI-MET, Hamburg
![Page 6: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/6.jpg)
Idealized case of cloud topped boundary layer:
Anurag Dipankar, MPI-MET, Hamburg
08 hrs
16 hrs
24 hrs
LES
![Page 7: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/7.jpg)
Turbulence scheme - issues:
Preliminary runs with real initial and boundary conditions show that the scheme is unstable
over topography.
… work is ongoing …
Anurag Dipankar, MPI-MET, Hamburg
![Page 8: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/8.jpg)
Simulation setup
‚Cologne‘: 220km radius, R2B10 – R2B15 (2.5km to 75m)
‚Germany‘: 680km radius, R2B09 – R2B14 (5km to 156m)
Initialization with COSMO-DE (2.8km) at 00 from forecasts at lead time 0
Lateral boundary nudging with COSMO-DE (3 hourly data)
Extpar data (ASTER topography, GLOBCOVER land-use)
NWP physics, but no convection parameterization
![Page 9: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/9.jpg)
9 Average over a 0.25°x 0.25° box around Jülich
April 2013: initialized and nudged with COSMO-DE: Nudging is working properly!
Cologne
![Page 10: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/10.jpg)
10 Average over a 0.25°x 0.25° box around Jülich
Also ‘free variables’ look reasonable (different micro physics!)
Cologne
![Page 11: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/11.jpg)
HATRPO microwave radiometer
Observations by KIT, provided through Verena Grützun 11
Observations
ICON-JL
Total column water vapor [kg m-2] Total column liquid water [kg m-2]
Day in April 2013
No observations No observations
Cologne
![Page 12: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/12.jpg)
Ceilometer
Observations provided through Verena Grützun 12
Observations
ICON-JL
Total cloud cover [%]
Day in April 2013
Cologne
![Page 13: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/13.jpg)
13 Precipitation data provided by Axel Seifert
24h accumulated
precipitation:
30h forecasts,
precipitation is
accumulated from
6:00 to 6:00 next
morning.
ICON: 1250m
resolution. Nudge
boundaries are in
the evaluation
domain, hence
some artifacts.
Overall: Good
performance!
Germany
![Page 14: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/14.jpg)
14
Germany
![Page 15: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/15.jpg)
15
Germany
![Page 16: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/16.jpg)
16
Germany
![Page 17: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/17.jpg)
17
Germany
![Page 18: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/18.jpg)
18
5000m
Germany
![Page 19: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/19.jpg)
19
2500m
Germany
![Page 20: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/20.jpg)
20
1250m
Germany
![Page 21: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/21.jpg)
21
625m
Germany
![Page 22: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/22.jpg)
22
312m
3d turbulence necessary!
Germany
![Page 23: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/23.jpg)
23
Horizontal diffusion
becomes important!
Vertical velocity [m/s] at model level 22 (~6800m)
![Page 24: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/24.jpg)
24
4998m: with convection
parameterization
Germany
![Page 25: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/25.jpg)
25
5000m
Germany
![Page 26: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/26.jpg)
26
4998m: long adjustment
time scale in CAPE
closure (3h)
Germany
![Page 27: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/27.jpg)
27
4998m: only shallow
convection
Germany
![Page 28: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/28.jpg)
Conclusion:
ICON is working reasonable in limited area mode.
Initialization and nudging with COSMO-DE works fine.
High resolution improves the forecasts.
We are getting closer to doing the fun stuff…
28
![Page 29: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/29.jpg)
Outlook:
Make 3D turbulence work on realistic cases.
Perform high resolution simulations as a benchmark for model development.
Realistic and idealized
Utilize HOPE observation data to build confidence in ICON-LES simulations.
Quantify uncertainty in terms of the representation of convective processes.
Improve the representation of convective processes.
Also with the help of stochastic physics.
29
![Page 30: LES simulations with ICON: the HD(CP) project€¦ · •German wide BMBF funded project. • HD(CP)2 will strive to build and use a model capable of very high-resolution simulations](https://reader034.vdocument.in/reader034/viewer/2022042210/5eae63961f5c7146d423315e/html5/thumbnails/30.jpg)
30 Plots by Bodo Ritter
R2B10 (2500m) -Tqv R2B11(1250m) - Tqv