Running the 2017 emissions modeling platform for other grids

SMOKE
1

Hello everyone,

I am a new user for the 2017 emissions modeling platform. I would like to run the 2017 emissions modeling platform for other grids.

The README file says that:

The scripts can be adapted to run for other grids. First, in the directory_definitions.csh script, edit REGION_ABBREV and REGION_IOAPI_GRIDNAME. You also may need to change other inputs in each individual sector script, such as spatial surrogates (SRGPRO / SRGDESC), transportable fractions (XPORTFRAC), gridded meteorology for onroad (METMOVES), ocean chlorine (for the sector merge), and biogenic land use and seasons (BELD4 and BIOSEASON).

I know how to edit SRGPRO / SRGDESC file, but how can I change these .ncf file such as XPORTFRAC, METMOVES, BIOSEASON for fitting my own grids?
Much appreciated for your help!

Thank you,
Lingyun

2

Is your grid aligned with the EPA grids at 12 or 4km or is it a different map projection with grid cells that are not aligned?

3

My map projection is the same as the EPA map projection now.
The original grid setting at the 2017 emissions modeling platform is:

‘12CONUS1’
2, 33.0D0, 45.D0,-97.D0,-97.D0, 40.D0
‘12US1_459X299’, ! abbrev.=12US1, common name = Continental 12km grid
‘12CONUS1’, -2556000.000, -1728000.000, 12.D3, 12.D3, 459, 299, 1

My own gridding setting is:
‘LAM_40N97W’
2 33.000 45.000 -97.000 -97.000 40.000
’ ’
‘US12NE’
‘LAM_40N97W’ 756000.000 -456000.000 12000.000 12000.000 130 140 1

4

Hi Alison,

Now I could run the 2017 emissions medoling platform successfully with my own domain and the horizontal resolution of 12km using those tools’ zip files released on the EPA website(https://gaftp.epa.gov/Air/emismod/). I have another question that what should I do if I want to run the 2017 emissions medoling platform with the EPA grids at 30 km? Much appreciated for your help!

Best wishes,
Lingyun

5

We don’t typically use a 30km grid. Did you mean 36km? We haven’t applied a 36km grid o 2017 platform but we have used it for our 2016 platform, although that wouldn’t necessarily stop you from running 2017 with the 36km grid.

7

I notice that the spatial surrogates at different grids (4, 12, 36km) are provided on https://gaftp.epa.gov/Air/emismod/2016/v1/spatial_surrogates/. But If possible, I would like to use 30km grid because my mcipout data is at 30km grid. Thank you!

8

Unfortunately, since the grids don’t align, you would need to recreate the spatial surrogates from scratch on your grid.

See https://www.cmascenter.org/surrogate_tools_db/

An alternative is it interpolate your met. data onto a modeling grid that matches the available surrogates, but you may not want to do that.

10

Okay, I would try to recreate the spatial surrogates. Thank you!