cgiannaros
New member
Dear all,
I perform some ultra-high resolution simulations during a heat-wave period with WRF coupled to BEP/BEM urban canopy model using the NOAH_MP land surface model. Attached you can find the namelist.input I use. Initially, I used version 4.3, but recently I applied also version 4.3.2, as it contains the following bug fix, according to developers:
"An error in longwave radiation calculation in the BEP-BEM urban module is fixed. This error affects the calculation of TSK, which now is correctly calculated."
Indeed, the use of initial version led to very high TSK values (~ 330 K in night and ~ 347 in day), which were not correspond well to satellite LST observations. The application of the updated/corrected versions, lead to better simulation of TSK, but to worse results concerning near surface atmospheric variables and especially for 2m air temperature.
In the provided figures, the first one corresponds to version 4.3 simulations, while the second corresponds to version 4.3.2 simulation for the first six days (25/07 00:00 to 30/07 00:00). A significant drop of the simulated 2m air temperature by 2-3 degrees Celsius is evident during the night with the updated/corrected version. During the day the results are the same.
Maybe the longwave radiation calculation in BEP/BEM corrects the TSK calculation, but affects negatively the computation of 2m air temperature and other near surface variables?
Any ideas on how to resolve this issue would be very much appreciated.
Best regards,
Christos
I perform some ultra-high resolution simulations during a heat-wave period with WRF coupled to BEP/BEM urban canopy model using the NOAH_MP land surface model. Attached you can find the namelist.input I use. Initially, I used version 4.3, but recently I applied also version 4.3.2, as it contains the following bug fix, according to developers:
"An error in longwave radiation calculation in the BEP-BEM urban module is fixed. This error affects the calculation of TSK, which now is correctly calculated."
Indeed, the use of initial version led to very high TSK values (~ 330 K in night and ~ 347 in day), which were not correspond well to satellite LST observations. The application of the updated/corrected versions, lead to better simulation of TSK, but to worse results concerning near surface atmospheric variables and especially for 2m air temperature.
In the provided figures, the first one corresponds to version 4.3 simulations, while the second corresponds to version 4.3.2 simulation for the first six days (25/07 00:00 to 30/07 00:00). A significant drop of the simulated 2m air temperature by 2-3 degrees Celsius is evident during the night with the updated/corrected version. During the day the results are the same.
Maybe the longwave radiation calculation in BEP/BEM corrects the TSK calculation, but affects negatively the computation of 2m air temperature and other near surface variables?
Any ideas on how to resolve this issue would be very much appreciated.
Best regards,
Christos