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### values of the height of the different vertical levels in WRF

Posted:

**Wed Sep 09, 2009 7:16 am**
by **guiyaum**

Hi,

I have been running WRF and I would like to know if anyone knows the mean to obtain the height (or pressure) corresponding to the different vertical levels.

thank you,

Guillaume

### Re: values of the height of the different vertical levels in WRF

Posted:

**Mon Jun 28, 2010 10:59 am**
by **b.glynn**

Hello Guillaume

I see this post is a little dated but I'm going to share the solution for others who my be interested:

Atmospheric models solve the equations of motion in constant pressure coordinates so we'll be working with that.

If your doing this as a case study the hypsometric equation is going to give more accurate results, assuming to have a way to get Tmean, SP and rho for that day.

If your looking to forecast for..say..tomorrows 100m meter wind speed then using a spreadsheet to generalize the levels should work. Try this:

dP = rho * g dZ

ex:

dP = 1.225 * 9.81 * 100m

dP ~ 1.202 kPa

So your level would be .9778

You will need to change you surface P accordingly. Tuning your Params for such fine vertical resolutions is going to be more than half the battle.

Hope this helps.

BG

### Re: values of the height of the different vertical levels in WRF

Posted:

**Mon Jun 28, 2010 5:15 pm**
by **jimmyc**

In WRF:

Pressure = P + PB

Geopotential height = (PH +PHB)/9.8

### Re: values of the height of the different vertical levels in

Posted:

**Sat Jan 07, 2017 1:46 am**
by **Jipson Johnson**

Is the model height is measuring from above ground or above sea level?