Discuss advection schemes, timestepping, pressure gradients, coordinates, etc.
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.
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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
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.
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Pressure = P + PB
Geopotential height = (PH +PHB)/9.8
The views expressed in this message do not necessarily reflect those of NOAA or the National Weather Service or the University of Oklahoma.
James Correia, Jr
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Is the model height is measuring from above ground or above sea level?
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