Process area/point-source ag NH3 emission for CMAQ



At first, I want to lay out what I want to do with the SMOKE output and CMAQ emission input. I am trying to run CMAQ_12US1 for a single day of 20140101 with my own ammonia emission inventory for NC. This emission inventory is ammonia emission from animal farms in North Carolina. The challenge here is that my ammonia emission is a point source. I need to cut off the ammonia part in NC from non-point ag livestock emission. And also, I need to generate new point source inputs which will be inln and stack group for ag_NH3_NC.

I have a pre-merged emission input file for nonpt sources named “emis_mole_all_20140101_12US1_cmaq_cb6_2014fb_cdc_cb6cmaq_14j.ncf”. It is a gridded single day input. I want to use ncbo in netcdf nco tools to subtract ag_NH3_NC from this file. How to generate the similar gridded CMAQ input or SMOKE output from NEI modeling platform?

I have some outputs from running NEI model platform as shown below.

However, they are not gridded. It seems that they need to be merged at some point to be compatible with “emis_mole_all_20140101_12US1_cmaq_cb6_2014fb_cdc_cb6cmaq_14j.ncf”.

Do you have any suggestion? If you have any other thoughts on what I can do, please let me know.

Appreciate, CMAS community!

Yijia Zhao