[Wrf-users] ERA-Interim data

[Nikhil]

hi. 

when you using data on pressure levels, you don't need to use calc-ecmwf-p as it is for when using ecmwf data on model levels. You have to keep in mind to use the correct Vtable for ungrib, as there are two one for plevel and one for mlevel. Also you should check the grib codes to make sure they match the one in downloaded data. it is a bit tricky to use ecmwf data first time around. 

Do remember to check the Metgrid.TBL as well



Sent from my iPhone

> On 15 Aug 2015, at 9:46 am, Md Hosen <md.hosen at live.vu.edu.au> wrote:
> 
> Dear Nikhil,
> 
> 
> Thanks for your heartiest cooperation. Finally, I have downloaded pressure levels and surface data. I have seen some posts in WRF users group that they run calc_ecmwf_p.exe between ungrib.exe and metgrid.exe. 
> 
> 
> 
> Could you tell me please is it always essential if I use ERA-interim data.
> 
> 
> 
> Also I have seen that if I want to run calc_ecmwf_p.exe,then I need ecmwf_coeffs table in the working directory. According to ARW user guide, I have found a link "http://www.ecmwf.int/products/data/technical/model_levels/index.html" for ecmwf_coeffs table. But the table is not existed in that link. I want to use "e_vert=50 or 60". 
> 
> Could you please suggest any link or any sample where I can get ecmwf_coeffs table. 
> 
> Could you please advise what criteria I have to follow to edit that table.
> 
> 
> 
> Your further suggestions will be highly appreciated.
> 
> 
> 
> Kind regards,
> 
> Hossain
> 
> 
> 
>  
> From: Nikhil Garg <nikhilgarg.gju at gmail.com>
> Sent: 15 August 2015 02:04
> To: Md Hosen
> Cc: wrf-users at ucar.edu
> Subject: Re: [Wrf-users] ERA-Interim data
>  
> you can use either of them
> 
> http://computing.io/wp/category/ecmwf/
> http://conorsweeneyucd.blogspot.sg/2015/01/how-to-run-wrf-driven-by-ecmwf-data.html
> 
> check these links out
> 
>> On 14 August 2015 at 13:50, Md Hosen <md.hosen at live.vu.edu.au> wrote:
>> Dear WRF users,
>> 
>> 
>> Good day!
>> 
>> 
>> First I have tried to use FNL data for WRF model. But I am not getting the good results compared to observation data. Therefore, I wish to use ERA-interim data. I have seen on the following website that there are different types (Types of Level) data sets  such as Model Levels, Pressure Levels, Surface Levels and so on.
>> 
>> 
>> http://apps.ecmwf.int/datasets/data/interim-full-daily/?levtype=pl
>> 
>> 
>> (1) Could you tell me please what is the criteria to select different data options. Do I need all types of data into same folder? Or I can use any of them.
>> 
>> 
>> (2) Do I need any preprocessing work after downloading the data and before use in WRF model? Is it need to change anything in Vtable?
>> 
>> 
>> (3) I have seen that it is possible to download one month data at a time. But if I want to download the data for couple of days then how I can download it?
>> 
>> 
>> (4) After downloading the data for a month, I got only one file containing whole data set. Do I need to split the time step of the data (like FNL data) . For Instance, 00hrs, 06 hrs, 12 hrs and 18 hrs. If so, then how I can do that.
>> 
>> 
>> 
>> Hope you will extend your helping hand.
>> 
>> 
>> 
>> Kind regards,
>> 
>> Hossain
>> 
>> 
>> 
>> _______________________________________________
>> Wrf-users mailing list
>> Wrf-users at ucar.edu
>> http://mailman.ucar.edu/mailman/listinfo/wrf-users
> 
> 
> 
> -- 
> Regards
> 
> Nikhil 
> 
> -------------------------------------------------------------------
> Big whirls have little whirls,
> Which feed on their velocity,
> And little whirls have lesser whirls,
> And so on to viscosity
> (Richardson, 1922)
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.ucar.edu/pipermail/wrf-users/attachments/20150815/ab468aee/attachment-0001.html