Search found 57 matches

by j0nes2k
Tue Sep 06, 2016 2:06 pm
Forum: UEMS v15.x support
Topic: UEMS wind parametrization
Replies: 27
Views: 19423

Re: UEMS wind parametrization

Hello, interesting topic - would be great if you could share your results which configuration works best for you and your area. From my experience for domains over Europe there is no clear "winning" configuration pattern available - the best accuracy gains I got was from increasing the res...
by j0nes2k
Wed Aug 17, 2016 9:30 am
Forum: UEMS v15.x support
Topic: Wind speed overestimation for domain over Canary Islands
Replies: 12
Views: 11360

Re: Wind speed overestimation for domain over Canary Islands

Hello,

this error persisted in about 5-6 runs around 2016-08-08. Since then, everything is working smoothly. By any chance, did you already encounter such issues with initial or boundary conditions?


Best regards,

Jonas
by j0nes2k
Tue Aug 16, 2016 1:10 pm
Forum: UEMS v15.x support
Topic: Wind speed overestimation for domain over Canary Islands
Replies: 12
Views: 11360

Re: Wind speed overestimation for domain over Canary Islands

Hello, thank you for your answer! I know the domain is quite small (138x64 points @ 4km resolution). Do you think adding a larger parent domain would help in this case? I also assume that the error is either in the domain setup itself (as it is quite small) or something is injected from the boundary...
by j0nes2k
Fri Aug 12, 2016 2:49 pm
Forum: UEMS v15.x support
Topic: Wind speed overestimation for domain over Canary Islands
Replies: 12
Views: 11360

Re: Wind speed overestimation for domain over Canary Islands

Here is another update: I have just visualized what is happening in my domain. You can see the animation output at: http://imgur.com/a/8ZGGE I also ran some tests with changing exactly one physics parameter at a time (CU_PHYSICS, RA_SW_PHYSICS, BL_PBL_PHYSICS) and finally ran another test using the ...
by j0nes2k
Mon Aug 08, 2016 2:38 pm
Forum: UEMS v15.x support
Topic: some fields like APCPsfc, GUST10m, TCDCclm - problem
Replies: 13
Views: 13020

Re: some fields like APCPsfc, GUST10m, TCDCclm - problem

Hello, also interested in a solution for better cloud coverage results. I can confirm that in my use simulations TCDCclm is the sum of low, mid and high (or sometimes maximum... not sure about the formula behind this at the moment). At the moment I am using a solution based on RHprs. Does anyone hav...
by j0nes2k
Mon Aug 08, 2016 11:19 am
Forum: UEMS v15.x support
Topic: Wind speed overestimation for domain over Canary Islands
Replies: 12
Views: 11360

Wind speed overestimation for domain over Canary Islands

Hello, I have set up a domain over the Canary islands with 4km resolution and 138x64 points. I am using the following configuration settings: - GFS 0.25 files - Adaptive Timestep on - CU_PHYSICS = 05 - RA_SW_PHYSICS = 02 - BL_PBL_PHYSICS = 1 I am observing a large overestimation of 10m wind speed fo...
by j0nes2k
Tue Jun 28, 2016 8:31 am
Forum: UEMS v15.x support
Topic: Configuration help for domains over Europe
Replies: 6
Views: 6054

Re: Configuration help for domains over Europe

Hello, thank you for your answer! I am still trying to understand WRF model better, therefore here are some followup questions: - I was running without a CU scheme because in the documentation it said "if in doubt run without" (for domains between 4 and 10km). Is the Grell 3D ensemble sche...
by j0nes2k
Mon Jun 27, 2016 1:46 pm
Forum: UEMS v15.x support
Topic: Configuration help for domains over Europe
Replies: 6
Views: 6054

Configuration help for domains over Europe

Hello, I have set up a domain over Europe with 7km resolution. There is no nesting set up for this domain. I am basically using the default set of parameters with the following changes: - use 0.25 degree GFS ptile files - Gravity Wave Drag on (GWD_OPT = 1) - Adaptive timestep - RA_SW_PHYSICS = 01 - ...
by j0nes2k
Mon Jun 11, 2012 1:23 pm
Forum: General NWP, Postprocessing, Meteorology
Topic: Generating mercator projection
Replies: 1
Views: 3532

Generating mercator projection

Hello, I am trying to generate tiles from my forecast models to display on Google Maps / Open Street Maps. Both use Mercator Projection for their tiles. I normally use GrADS, but they don't have a mercator projection available. Did anyone find a way around this? Maybe with the help of another softwa...
by j0nes2k
Wed May 23, 2012 8:19 am
Forum: Legacy EMS (WRFEMS 3.2 and lower) support
Topic: Crash in real.exe "troubles, could not find trapping x locations"
Replies: 28
Views: 28170

Re: Crash in real.exe "troubles, could not find trapping x locations"

Now this gets interesting... I am running ems_install version 2010.03.19, which should correspond to WRF v3.1.1.

How can I make the necessary changes to ungrib/metgrid or the Vtable? gfs fallback is definitely an important point for me.

Thanks again!

Jonas