Skin temperature not available and no 2mt too!

[Mohammed Nabil]

Hello everyone!
I am trying to run WRF based on CMIP6 data that only provide,

Surface variables:
sea surface temperature
sea-level pressure
surface pressure

pressure level variables (14 lev):
air temperature
zonal wind
meridional wind
relative humidity
geopotential height

soil variables (4 lev):
soil moisture
soil temperature

when i run ./real.exe, i get this error message

DYNAMICS OPTION: Eulerian Mass Coordinate
alloc_space_field: domain 1 , 63158024 bytes allocated
d01 2022-02-01_00:00:00 Yes, this special data is acceptable to use: OUTPUT FROM METGRID V4.5
d01 2022-02-01_00:00:00 Input data is acceptable to use: met_em.d01.2022-02-01_00:00:00.nc
metgrid input_wrf.F first_date_input = 2022-02-01_00:00:00
metgrid input_wrf.F first_date_nml = 2022-02-01_00:00:00
d01 2022-02-01_00:00:00 Timing for input 1 s.
d01 2022-02-01_00:00:00 flag_soil_layers read from met_em file is 1
Max map factor in domain 1 = 1.02. Scale the dt in the model accordingly.
Missing surface temp, replaced with closest level, use_surface set to false.
Missing surface RH, replaced with closest level, use_surface set to false.
Missing surface u wind, replaced with closest level, use_surface set to false.
Missing surface v wind, replaced with closest level, use_surface set to false.
Using sfcprs to compute psfc
d01 2022-02-01_00:00:00 No average surface temperature for use with inland lakes
Assume Noah LSM input
-------------- FATAL CALLED ---------------
FATAL CALLED FROM FILE: <stdin> LINE: 3110
grid%tsk unreasonable

seems like there is a problem with the skin temperature, according to this previous solved issue,

M

Post in thread 'does WRF needs TSK from global data'

Nov 30, 2020

David,
Please take a look at the code dyn_em/module_initialize_real.F, in which you will find the piece of codes below:

     IF ( config_flags%use_tavg_for_tsk ) THEN
         IF ( we_have_tsk .OR. we_have_tavgsfc ) THEN
           !  we are OK
         ELSE
            CALL wrf_error_fatal ( 'We either need TSK or TAVGSFC, verify these fields are coming from WPS' )
         END IF

It indicates that WRF needs TSK as input.

In cases the input data doesn't have this variable, REAL tries to use SST to represent TSK:

      !  Fix grid%tmn and grid%tsk.

      fix_tsk_tmn ...

• Ming Chen

• 

real.exe would first use sst to replace it, if sst is not available then it would use 2mt to represent it!

question: if i don't have the specific 2mt, wouldn't real.exe interpolate it from the nearest level air temperature, and then use it to represent skin temperature in the same principle? how can i overcome this?