[Wrf-users] Long-run Simulation

[Nikhil Garg]

i suppose you dont need to worry about metgrid, and also about real, you
can create wrfbdy file for batches, as it only stores boundary condition.

you have to run real.exe few times for each set of simulation and then copy
the files from real.exe output to separate directories, so that you dont
overwrite them.

also, if you dont want to use initial conditions again and again, and have
a continuous simulation despite doing it in batches, possibly "restart" is
what you want, just store the restart file at the end of each run, and
remove the old wrfbdy file and put new wrfbdy and start the run with
restart file.

it will be a continuous run. you can write a shell script (or perl or
python) depending on what you prefer, to do the whole batch run, where the
script
can modify the namelist entry, copy files around etc


On 24 February 2017 at 01:26, Mickias Kebede <ws.micky at gmail.com> wrote:

> Hello! Tabish,
>
> Thank you very much for your email. Yes, I've used the model output from
> NCAR to enforce my model (NCAR CESM Global Bias-Corrected CMIP5 Output to
> Support WRF/MPAS Research) and I'm interested in simulating from 1970 to
> 2005 for the past and do the same in the mid-century. No need to do
> ungrib in this case as the data is already in intermediate format and I've
> downloaded the data for the entire time frame. My concern is, for that
> one-year successful simulation I did, the size of wrfbody is about 20 GB
> and I'm concerned how big it's going to be for the entire 30 years? I'm
> wondering if there is a way to break the 30 years simulation into fewer
> number of years such as three 10 years while I run the metgrid.exe and
> real.exe?
>
> Thank you very much again and any help would be highly appreciated.
>
> Kind regards,
>
> Mickias,
>
>
>
> On Thu, Feb 23, 2017 at 9:35 AM, Tabish Ansari <tabishumaransari at gmail.com
> > wrote:
>
>> Hi Mickias,
>>
>> I assume that you had your initial and boundary conditions for
>> meteorology for the one year that you ran the model for, in your wrfinput
>> and wrfbdy files. You must have produced these files through ungrib and
>> metgrid utilities, and must have downloaded a reanalysis or global model
>> data like FNL/GFS or ECMWF to create these files.
>>
>> You cannot run a regional model (WRF) without initial and (more
>> importantly) boundary conditions. So you'll have to first run a global
>> model for the 30 years past and 30 years future, or alternatively contact
>> someone who has run it and has the output available for that period. Then
>> use that data (instead of FNL etc.) to create new wrfinput and wrfbdy
>> files. This would require a fair amount of restructuring and reformatting
>> of data if you want it to be processed by WPS. Once you've produced your
>> wrfinput and wrfbdy files for the required period, you can go ahead and run
>> WRF.
>>
>>
>> Good luck!
>>
>> Tabish
>>
>> Tabish U Ansari
>> PhD student, Lancaster Environment Center
>> Lancaster Univeristy
>> Bailrigg, Lancaster,
>> LA1 4YW, United Kingdom
>>
>> On 23 February 2017 at 10:53, Mickias Kebede <ws.micky at gmail.com> wrote:
>>
>>> Hello!
>>>
>>> I did a successful one-year simulation of three different parallel cases
>>> of simulations. I would like to do the same three parallel runs but this
>>> time with 30 years in the past and 30 years in the future. Can I just
>>> adjust the dates in my namelist.wps to my 30 years span timeframe and run
>>> geogrid and do the rest of the running processes as one continuous
>>> simulation? Or is there any another trick that I should do perhaps to break
>>> the long 30 years simulation into smaller such as three 10 year simulations?
>>>
>>> Which one is the most effective way of doing such type of long
>>> simulations?
>>>
>>> Thank you very much and any help would really be appreciated.
>>>
>>> --
>>> ​
>>>
>>>
>>>
>>>
>>> *Best regards,Mickias*
>>>
>>> _______________________________________________
>>> Wrf-users mailing list
>>> Wrf-users at ucar.edu
>>> http://mailman.ucar.edu/mailman/listinfo/wrf-users
>>>
>>>
>>
>
>
> --
> ​
>
>
>
> _______________________________________________
> Wrf-users mailing list
> Wrf-users at ucar.edu
> http://mailman.ucar.edu/mailman/listinfo/wrf-users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.ucar.edu/pipermail/wrf-users/attachments/20170224/c650374e/attachment.html