[Wrf-users] Questions regarding how simulation domain settng up

[曹智选]

Dear all,
ashwinD12's answer and Ildan's answer give me a practical ways to determine
i_start and j_start. Thank you so much ashwinD12 and Ildan.

 I have another question which I posted several days ago but was hold and
not got posted:
What is constrain/standard to choose dx and dy? Previously, I was using
equivalent resolution in km on equator corresponding to resolution of
meteorological data in degree. Is there any official criteria about
choosing dx and dy?

Thank you!

Zhixuan Cao

2016-10-27 19:27 GMT-04:00 ashwinD12 . <winash12 at gmail.com>:

> http://earthscience.stackexchange.com/questions/
> 2732/how-to-get-cell-indices-from-latitude-and-longitude-
> in-wrf-model-grids
>
> Is this what you are looking for ?
>
> On Fri, Oct 28, 2016 at 2:47 AM, 曹智选 <hitcaozx at gmail.com> wrote:
>
>> Hello,
>> I am runing WRF with nested domain to get higher resolution
>> meteorological data for a specific region. So the longutide range and
>> latitude range of this specific domain is known.
>>
>> How to determine i_start and j_start for the nested domain so that these
>> "finer-resolution domain" covers the region of interest.
>>
>> To be more specific, I am looking for detailed documentaion that can tell
>> me the map between real world (Earth's surface and atmosphere above) to the
>> vitual world (The simulation domain.).
>>
>> Chapter 3 of user manual gives a little information. As for projection
>> "Polar Stereographic" and "Lambert ",  the projected earth surface can not
>> fill up the rectangular box. There are some "empty areas".  So what will be
>> the simulation domain looks like. Is it a regular box?
>>
>> In WRF simulation, should the nodes carries meteorological data concide
>> with nodes of coarse domain?
>>
>> Thank you!
>>
>> Zhixuan Cao
>>
>>
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>> Wrf-users at ucar.edu
>> http://mailman.ucar.edu/mailman/listinfo/wrf-users
>>
>>
>
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