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ERROR: The reference pressure is not monotonically decreasing (using ndown.exe)

Arty

Member
Hello,

As the previous posts on the matter have been archived, here's a new one. Is there anything I could do to solve this error ?
Note that altitude (at i,j = 1) and pressure (at k = 1,2) are very unlikely to me... I don't understand where these values come from.

I already tried adding etac = 0.1 ; 0.05 & 0.3 with no positive result.

taskid: 0 hostname: r1i6n27
module_io_quilt_old.F 2931 T
Ntasks in X 1 , ntasks in Y 2
Domain # 1: dx = 21000.000 m
Domain # 2: dx = 7000.000 m
Domain # 3: dx = 2333.333 m
NDOWN_EM V4.2.1 PREPROCESSOR
*************************************
Parent domain
ids,ide,jds,jde 1 441 1 166
ims,ime,jms,jme -4 446 -4 90
ips,ipe,jps,jpe 1 441 1 83
*************************************
DYNAMICS OPTION: Eulerian Mass Coordinate
alloc_space_field: domain 1 , 2306475580 bytes allocated
This input data is not V4: OUTPUT FROM WRF V3.6.1 MODEL
Input data is acceptable to use: wrfout_d01_2005-02-02.nc
----- ERROR: The reference pressure is not monotonically decreasing
This tends to be caused by very high topography
(i,j) = 1 1 , topography = 217.6845 m
k = 1 , reference pressure = 2461.297 Pa
k = 2 , reference pressure = 5000.000 Pa
-------------- FATAL CALLED ---------------
FATAL CALLED FROM FILE: <stdin> LINE: 1237
In the dynamics namelist record, reduce etac from 0.2000000
-------------------------------------------
 
What type of input data are you using? Can you also attach your full namelist.input file? When you changed it to 0.1, did you get the exact same error? Thanks!
 
What type of input data are you using? Can you also attach your full namelist.input file? When you changed it to 0.1, did you get the exact same error? Thanks!
Hi kwerner,

Sorry for the late response. I attached the namelist.input as well as the lists of files which are used as inputs. Changing etac to 0.1 leads to exact same error indeed.

Thanks for your help.
 

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  • namelist.input - ndown.txt
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Hi kwerner,

Sorry for the late response. I attached the namelist.input as well as the lists of files which are used as inputs. Changing etac to 0.1 leads to exact same error indeed.

Thanks for your help.

OK... I changed 2 things for ndown to successfully run :

1) wrfout* are based on 33 vert. levels defined by a list of eta levels vs. met_em* which are on 50 vert. levels with automatic eta levels --> I ran the hole WPS/REAL process with the same 33 eta levels in both files.
2) I corrected a typo from said eta levels' list ("0." instead of "à." to one of the 33 values...)

I think the first option made ndown able to run. The rsl.error* were empty then until I found the typo in eta levels of the namelist.
 
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