| Section | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
...
For more details of the OpenIFS virtual machine and how to get the workshop files, please contact: openifs-support@ecmwf.int.
ECMWF operational forecasts
At the time of this case study in 2012, ECMWF operational forecasts consisted of:
- HRES : spectral T1279 (16km grid) highest resolution 10 day deterministic forecast.
- ENS : spectral T639 (34km grid) resolution ensemble forecast (50 members) is run for days 1-10 of the forecast, T319 (70km) is run for days 11-15.
At the time of this workshop (2016), the ECMWF operational forecasts has been upgraded compared to 2012 and consisted of:
- HRES/2016 : spectral T1279 with an octahedral grid configuration providing highest resolution of 9km.
- ENS/2016 : spectral T639 with an octahedral grid configuration providing highest resolution of 18km for all 15 days of the forecast.
Please follow this link to see more details on changes to the ECMWF IFS forecast system (
Saving images and printing
...
If using the metview/openifs virtual machine with these exercises the recommended minimum memory is 4Gb. These exercises use a relatively large domain with high resolution data. Some of the plotting options can therefore require significant amounts of memory. If the virtual machine freezes when running metview, please try increasing the memory assigned to the VM.
Outline of the exercises
TO BE DONE (flowchart as last year?
- Study track & development of Hurricane Nadine and the N.Atlantic cut-off low
- Study HRES & ENS forecasts of the time
- Study HRES & ENS forecasts using the 2016 ECMWF ensemble forecast
- .... PCA analysis ..
- ...etc...
try increasing the memory assigned to the VM.
Starting up metview
To begin:
...
| Info |
|---|
Please enter the folder 'openifs_2016' to begin working. |
...
. |
Saving images and printing
To save images during these exercises for discussion later, you can either use:
"Export" button in Metview's display window under the 'File' menu to save to PNG image format. This will also allow animations to be saved into postscript.
or use the following command to take a 'snapshot' of the screen:
| Code Block | ||
|---|---|---|
| ||
ksnapshot |
Exercise 1. The ECMWF analysis
Recap
ECMWF operational forecasts consist of:
...
| Info | ||
|---|---|---|
| ||
|
...
Exercise 2: The operational HRES forecast
Recap
The ECMWF operational deterministic forecast is called HRES. At the time of this case study, the model ran with a spectral resolution of T1279, equivalent to 16km grid spacing.
...
The following datasets are available on the Virtual Machine for this workshop:
Further reading
For more information on the stochastic physics scheme in (Open)IFS, see the article:
Shutts et al, 2011, ECMWF Newsletter 129.
Acknowledgements
We gratefully acknowledge the following for their contributions in preparing these exercises. From ECMWF: Glenn Carver, Sandor Kertesz, Linus Magnusson, Iain Russell, Simon Lang, Filip Vana. From ENM/Meteo-France: Frédéric Ferry, Etienne Chabot, David Pollack and Thierry Barthet for IT support at ENM.
...