About rdlai2d option in WRF-CHEM3.5.1

[yujiaoyang]

Hello! Thank you very much for reading my post.
I am using WRF-chem3.5.1, I have made a LAI binary file, and already have external LAI data in the met_em_d01 file. Is the rdlai2d function in namelist.input unavailable in WRF-chem 3.5.1? The WRF manual says that this rdlai2d option is available from WRFV3.6. But I use WRF-Chem3.5.1, is there a way to read external LAI data in WRF-chem3.5.1? I look forward to your reply!

 

[Ming Chen]

In this case, you will have to modify the codes of WRF-CHEMV3.5.1. You may refer to those relevant codes in WRFV3.6 and learn how to do it.

 

[yujiaoyang]

Thanks for your reply！Is the code related to reading the external LAI in module_sf_noahlsm.F 、module_sf.noahdrv.F, and module_initial_real.F? I am not very familiar with the WRF code, I look forward to your reply and appreciate your help！

 

[Ming Chen]

If you run with Noah, you need to modify the following codes:
phys/module_surface_driver.F
phys/module_sf_noahdrv.F
phys/module_sf_noahlsm.F
dyn_em/module_first_rk_step_part1.F

The changes involved with this option is not that complicated, but you do need to understand Fortran.

 

[yujiaoyang]

Thanks for your help! I now use another method to read the external LAI with the higher version of WRF-chem 3.6.1, running real.exe and get the updated LAI variable, then copy LAI variable to the wrfinput in wrf3.5.1 . When running WRF-chem 3.5.1, set rdlai2d = .true in namelist.input.
This can also successfully run and read the external LAI 12 months data.
Thank you very much,best wishes for you！

 

[Ming Chen]

Thank you for the update of this issue. I guess this will be helpful for others who may want to do the same. We appreciate your input !