[Wrf-users] W vertical wind component direction

[Saji Hameed]

Hi Iris,

Is it vertical velocity defined in terms of pressure (this variable is
conventionally called omega). Since pressure decreases upwards, negative
omega is assosciated with upward motion.

saji


Saji N Hameed,
Environmental Informatics,
University of Aizu, Tsuruga, Ikki-machi,
Aizuwakamatsu-shi, Fukushima 965-8580,
Japan

Tel: +81242 37-2736
Fax:+81242 37-2760
 email: saji at u-aizu.ac.jp
 url: http://enformtk.u-aizu.ac.jp
 bib: http://www.researcherid.com/rid/B-9188-2009
code: https://github.com/sajinh

On Wed, Jun 6, 2018 at 4:56 PM, Dekker, I.N. (Iris) <I.N.Dekker at uu.nl>
wrote:

> Dear WRF users,
>
> I was looking at the vertical wind component values in my WRF output but
> was not completely sure how to interpret. If the vertical wind component is
> negative: is there an downward movement of air or an upward movement?
> I could not find any information in the WRF user guide or WRF wiki page
> other than that W is the vertical wind component. And does anyone know how
> the w component was calculated by WRF?
>
> Thanks in advance,
>
> Iris
>
>
> Iris Dekker MSc
> PhD student
>
> Atmospheric Physics and Chemistry Group
> IMAU Institute for Marine and Atmospheric Research Utrecht, Utrecht
> University
> Princetonplein 5
> 3584 CC Utrecht
> I.N.Dekker at uu.nl
>
> SRON Netherlands Institute for Space Research
> Sorbonnelaan 2
> 3584 CA Utrecht
> I.Dekker at sron.nl
>
>
>
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>
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