Closing Pleim-Xiu LSM surface energy budget

[Amber_yq]

Hi,

I am trying to compute the surface energy budget of PX land surface model by the following equations as suggested in https://forum.mmm.ucar.edu/phpBB3/viewtopic.php?f=43&t=5674&p=13582&hilit=heat+budget#p13582:

GSW=(1-ALBEDO)*SWDOWN: net shortwave radiative flux
GLW: downward longwave radiative flux
LWUPFLUX = STBOLT*TSK**4: where STBOLT is the Stefan-Boltzmann constant
netLW = EMISS*(GLW-LWUPFLUX): net long wave radiative flux
net radiative flux: RNET = GSW+netLW
Surface energy budget can be computed as RNET-GRDFLX-HFX-LH

But I ended up with very large imbalance of around 200 w/m2. Can anyone suggest me with the correct equation in this context?

Thank you,
Amber

 

[Ming Chen]

Amber,
I have a few questions:
(1) Which version of WRF did you run?
(2) When you calculate surface energy budget, did you look at a single grid point or domain-average?
(3) Can you upload a plot that shows time series of GSW, LWUPFLUX, HFX, LH , GRDFLX and the net energy balance at a single grid and also the domain average?

 

[Amber_yq]

Thank you for your reply! I am using WRFV4.2.2 and the surface energy budget was calculated at a single grid cell.
I have attached seb time series for both single grid and domain average below. View attachment _seb_px_grid.pngView attachment _seb_px_domain.png

 

[Ming Chen]

Hi Amber,
Please upload your namelist.input for me to take a look. Thanks.

 

[Amber_yq]

Please see attached.View attachment namelist.input