<div dir="ltr">Thank you all for the helpful reply.<br><br>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
<a href="http://www.meteo.unican.es/wiki/cordexwrf/OutputVariables">http://www.meteo.unican.es/wiki/cordexwrf/OutputVariables</a>, it looks like
same. But I would like to confirm you all for clarification.<br><div class="gmail_extra"><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Feb 16, 2016 at 6:47 PM, CARLOS ROMAN CASCON <span dir="ltr"><<a href="mailto:carlosromancascon@ucm.es" target="_blank">carlosromancascon@ucm.es</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Hi,</div><div><br></div>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:<div><br></div><div><div>Kunkel BA. 1984. Parameterization of droplet terminal velocity and extinction coefficient in fog models. J. Clim. Appl. Meteorol. 23: 34–41.</div></div><div><br></div><div>Best regards.</div><span class="HOEnZb"><font color="#888888"><div><br></div><div>Carlos</div></font></span></div><div class="gmail_extra"><br><div class="gmail_quote"><div><div class="h5">2016-02-16 17:09 GMT+01:00 Tiago Luna <span dir="ltr"><<a href="mailto:tiagoluna@ua.pt" target="_blank">tiagoluna@ua.pt</a>></span>:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5">
<div text="#000000" bgcolor="#FFFFFF">
<div>Some years ago I came across with this
work:<br>
<br>
<a href="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" target="_blank">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</a><br>
<br>
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.<br>
<br>
Regards,<br>
Luna<br>
<br>
<br>
On 15-02-2016 05:27, Sundar J wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>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?<br>
<br>
</div>
<div>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?<br>
</div>
<div><br>
</div>
Regards<br>
</div>
</blockquote>
<br>
</div>
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