Secondary aersosl concentration reach to infinity

[Ravi Prakash Maurya ce23d031]

Dear All,

I am currently working on WRF-3.9.1. I am trying to simulate the Indian Himalayan region. I am running with following emissions datasets:

- Meteorological Forcing Data: ERA5  .
- Anthropogenic Emissions: EDGAR  .
- Biogenic Emissions: MEGAN  .
- Fire Emissions: FINN  .
- Chemical Boundary Conditions: WACCM/CAM-Chem. 

I am using chem_opt=202.

After the first time the chemistry module is called the secondary aerosol concentration reaches to infinity. I am attaching my namelist for perusal.

I would be very thankful if anyone could help on on this. Please let me know if I need to provide any additional information on this.

Kind regards,

Ravi

[Gabriele Pfister]

Hi, 

I only took a brief look through your nameslist and there are various settings you would want to revise. 

E.g, you use phot_opt=1 but we strongly suggest using the latest TUV version (option 4). See our website for more information (https://www2.acom.ucar.edu/wrf-chem). 

I also suggest going through your input files and making sure you have no negative emissions or other strange values in them. 

A first helpful check is also to run without any chemistry and make sure that your met-only setup runs fine. 

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

[nikhil korhale]

Hi Ravi

Have you resolved this error? I am also getting the same error.

Best regards

Nikhil

[Ravi Prakash Maurya ce23d031]

Hi Nikhil, 

I haven't been able to find the solution but find a way to use aerosol chemistry with chem_opt 202.

In module_mosaic_therm.F at around line 5031. Instead of this:

If (glysoa_param==glysoa_param_comples) call glysoa_complex(dtchem)

I am using this:

If (glysoa_param==glysoa_param_comples) call glysoa_simple(dtchem)

To understand what it changes, I kindly request you to go through this paper: Simulation of semi-explicit mechanism of SOA formation from glyoxal in aerosol 3D model by C Knote.

Hope this helps

Regards

Ravi M

Research Scholar

Indian Institute of Technology Madras