[Wrf-users] press_pa levels and num_metgrid_levels

[Elena Maria Pison San Pedro]

Hi,

 

I'm a bit confused about the difference between the defined "press_pa
levels" in namelist.wps and "num_metgrid_levels" in namelist.input which
in my case are set to the defaults values.

 

press_pa levels  =201300,95000,...100000, total 23 levels

num_metgrid_levels = 27 coming from GFS 0.5deg

 

and my questions are:

 

1.     If the normal sea surface pressure is ~101.325 Pa, how can it be
the first level at 201.300 Pa? What does this represents?

 

2.     Is the difference between 23 pressure levels and 27
metgrid_levels due to the 4 soil layers?

 

3.     If P_top_requested  is set to 5000 Pa, then the 27 levels are
interpolated between the first level and the last one ?

 

A big thanks in advance!

 

Best,

Elena

 

 

 

Elena Pison San Pedro

M.Sc. in Atmospheric Sciences

Meteorologist/Climate Change Researcher

 

 

 

DHI-NTU Research Centre and Education Hub,

DHI Water & Environment (S) Pte Ltd

1 Clean Tech Loop

#03-05 CleanTech One

Singapore 637141

	
	
	
	
	
	
	
	
	
 

Tel:  

 

+65-6777-6330

 

emp at dhi.com.sg <mailto:emp at dhi.com.sg> 

www.dhigroup.com <http://www.dhigroup.com/> 

 

 

 

 

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