icon-eu download data
- Thread starter dominic
- Start date
Thank you very much for your precious answer Ming Chen, I only have one problem, I notice that in other scripts, for example the one in the github discussion for icon integration, cdo is used with additional files downloadable from dwd for the regrid. This is because in icon there are problems with the levels if I understand correctly. In the script in question I don't see this string.
Thanks so much for further suggestions
Pugazenthi
New member
Hi dominic!!
Actually cdo used with the dwd regrid files are generally for re-griding Icosachedral triangular grids to regular lat-lon grid which is preferred by WRF.
In the Chen mentioned script its already downloading Lat-lon grid attribute file only and if you are interested in European region, you probably don't need this regriding process.
You can directly incorporate the downloaded and merged files for WRF initialization.
Note that, Regridding is done, according to your input datasets.
Actually cdo used with the dwd regrid files are generally for re-griding Icosachedral triangular grids to regular lat-lon grid which is preferred by WRF.
In the Chen mentioned script its already downloading Lat-lon grid attribute file only and if you are interested in European region, you probably don't need this regriding process.
You can directly incorporate the downloaded and merged files for WRF initialization.
Note that, Regridding is done, according to your input datasets.
julianrvogel
New member
Hello everyone,
I am currently testing to run WRF V4.6.1 using ICON data as input. I have tested only the European model ICON-EU so far. After a few struggles, it works for me. However, I found a few things that seem strange to me using this download script.
First of all, there is a newer version of the download script from Michael Graf on Github that acknowledges that the European model forecasts 1-hourly data only for up to 30 hours (in the newer script the forecast hours fff reach until 24 instead of 72). But the script still downloads only the model levels from 1 to 60, while there are actually 74 model levels. It may be the case that an older ICON-EU model had fewer levels or maybe there was another reason for this? As far as I can see, if we download only levels 1 to 60, the atmospheric data between 20 m (level 74) and ~ 1.9 km (level 60) is missing. The data is probably still sufficient so that WPS/WRF wouldn't complain and just interpolate everything in between, but this seems not ideal.
Finally, the soil level 0 temperature is not used by the VTable, so I removed it from the download. However, there are 2 more soil levels in the Vtable that we actually need to download.
I am attaching my corrected version of the download script. Hopefully, it may be of use to others and maybe someone else here can confirm my modifications.
Thanks a lot to the contributors who implemented the ICON support! Very useful
I am currently testing to run WRF V4.6.1 using ICON data as input. I have tested only the European model ICON-EU so far. After a few struggles, it works for me. However, I found a few things that seem strange to me using this download script.
First of all, there is a newer version of the download script from Michael Graf on Github that acknowledges that the European model forecasts 1-hourly data only for up to 30 hours (in the newer script the forecast hours fff reach until 24 instead of 72). But the script still downloads only the model levels from 1 to 60, while there are actually 74 model levels. It may be the case that an older ICON-EU model had fewer levels or maybe there was another reason for this? As far as I can see, if we download only levels 1 to 60, the atmospheric data between 20 m (level 74) and ~ 1.9 km (level 60) is missing. The data is probably still sufficient so that WPS/WRF wouldn't complain and just interpolate everything in between, but this seems not ideal.
Finally, the soil level 0 temperature is not used by the VTable, so I removed it from the download. However, there are 2 more soil levels in the Vtable that we actually need to download.
I am attaching my corrected version of the download script. Hopefully, it may be of use to others and maybe someone else here can confirm my modifications.
Thanks a lot to the contributors who implemented the ICON support! Very useful