model fails to read in MEGAN file for nested run

[Suqian Chu]

Hello,

I got an issue when running WRF-Chem with MEGAN v2.04 for 2 domains. My previous run with 1 domain worked well, but in this 2 dom run, it seems that there is something wrong when reading in the wrfbiochemi files. As a result, msebio_isop and many other MEGAN variables are zero (e.g. LAIc, tsa24, par24). I am wondering what could cause this issue and what could help to track the issue. 

I  have attached my wrfbiochemi files. Here are my namelist.input for MEGAN part:

&time_control

  auxinput6_interval_d    = 30,   30    !simulation time is 16 days

&chem

   bioemdt                 = 30,     30

   bio_emiss_opt      = 3,      3,
   ne_area                 = 500,

Thanks!

Suqian

[Gabriele Pfister]

Hello Suqian

could you please share your namelist with us? Also, if you look at the isopr fields in your output, do they reflect the missing biogenic emissions? 

Thanks

Gabi

--

================================
Gabriele Pfister

Atmospheric Chemistry Observations & Modeling (ACOM) Lab

NSF National Center for Atmospheric Research (NCAR)

Email: pfi...@ucar.edu

Work Phone: +1 303 497 2915

Web: https://staff.ucar.edu/users/pfister

[giwrgos papadopoulos]

Hello to everyone,

I was wondering if this issue was resolved, since I am facing the exact same problem. I am running a simulation with 4 nested domains and, viewing the outputs with ncview, it is obvious that only d01 has proper isoprene emissions (with a proper diurnal variation and everything), while all nested domains only get some isoprene from their lateral boundaries. This is puzzling, since all wrfbiochemi_d0* are generated properly and there doesnt appear to be any problem with the values of the variables such as MSEBIO_ISOP or LAI in my domains. Furthermore, these variables also appear to be loaded properly to the wrfinput_d0* files.

I am uploading my namelists and logs in case they help figure out the issue. Would really appreciate a response, thanks in advance!!

[Gabriele Pfister]

Hi Giwrgos

I have been looking through your rsl file and it does not seem as if your wrfbio files are read in at all? So I am surprised that your biogenic emissions in d01 look fine. 

Could you try again but in your namelist change to:

debug_level = 100 (i.e. increase the amount of information that is written to the logfile)

and also add: 

auxinput6_interval_h                = 120, 120, 120, 120

You could also add the wrfbiochemi_fields (e.g. MSEBIO_ISOP) to your output to ensure the fields are being read in. 

Gabi