[Wrf-users] Calculating surface visibility from wrfout file

[Sundar J]

Thank you all for the helpful reply.

I could find lot of documents related to visibility now. In most of the
cases Liquid Water Content (LWC) is mentioned for deriving visibility. Is
it equivalent to QCLOUD of the wrfout parameter? From this page
http://www.meteo.unican.es/wiki/cordexwrf/OutputVariables, it looks like
same. But I would like to confirm you all for clarification.


On Tue, Feb 16, 2016 at 6:47 PM, CARLOS ROMAN CASCON <
carlosromancascon at ucm.es> wrote:

> Hi,
>
> You can always use a formula to convert liquid water content (LWC)
> (QCLOUD) at the lowest level into visibility. See for example the formulas
> given in the next paper:
>
> Kunkel BA. 1984. Parameterization of droplet terminal velocity and
> extinction coefficient in fog models. J. Clim. Appl. Meteorol. 23: 34–41.
>
> Best regards.
>
> Carlos
>
> 2016-02-16 17:09 GMT+01:00 Tiago Luna <tiagoluna at ua.pt>:
>
>> Some years ago I came across with this work:
>>
>>
>> https://www.researchgate.net/profile/Ji_Woo_Lee/publication/277004271_Predictability_Experiments_of_Fog_and_Visibility_in_Local_Airports_over_Korea_using_the_WRF_Model/links/555d00b608ae8c0cab2a6aef.pdf
>>
>> Please take a moment to read it and search for some of it's references. I
>> don't know if there is any recent work about this.
>>
>> Regards,
>> Luna
>>
>>
>> On 15-02-2016 05:27, Sundar J wrote:
>>
>> As the subject suggest, is there any formula exist for calculating
>> surface visibility? I have seen some of the weather sites which shows the
>> visibility plots (mostly from GFS as input data). Is there any way that to
>> plot the surface visiblity parameter using parameters from wrfout file?
>>
>> I have read some of the some of the scientific paper which indicates none
>> of the models has visibility as one of the output parameter. Why does it so?
>>
>> Regards
>>
>>
>>
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>>
>>
>
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