Using InMAP with emissions input data other than the default input data (preprocessed 2014 NEI)

[Emma Rieves]

Hi all!

I'm hoping to run InMAP with something other than the preprocessed 2014 NEI data that comes with the InMAP download. I have two main questions about this:

(1) I'm trying to use downscaled 2017 NEI data (at the 1 x 1 km resolution, details available here: https://pubmed.ncbi.nlm.nih.gov/36351966/). So far I have gotten the model to run, with the exception that the output spatial resolution isn't what I had specified (more coarse) and that all pollutant fields aside from "BasePM25" are 0 (windspeed and VOC are NULL, screenshot attached below). I checked the input data and the input pollutants have different names, so I tried renaming them in the .toml file to see if the reason the output data was 0 was that the fields didn't match, but when I did this, I received the following error:

" “InMAP: problem initializing model: inmap: undefined variable name 'VOC_ann' "

Interestingly, I tried running the model again without changing anything but then got the same error for a different pollutant. I've attached a screenshot of the .toml file below.

It's worth noting that the input data pollutants are slightly different (see screenshot of subset of data from R).

Does anyone have any suggestions as to how I can get the model to run (without outputting just 0s for all pollutants except for base PM), especially at the specified spatial scale? I've attached a screenshot of the output data as well. I'd be happy to hear from folks that have used their own input data (aside from the default file) in general to learn how this went.

(2) Could AEP be run to process 2017 or 2020 emissions? Is there a tutorial on how to run AEP?  Based on the documentation I'm not sure if I need to copy and edit certain scripts (after downloading the whole library) or if it runs more similarly to InMAP. If anyone has had success running AEP, I'd love to know what you did!

Thanks for any help you can provide me!

[Talor Gruenwald]

Hi Emma, 

I'm not an expert though I have run InMAP with the downscaled NEI data you mentioned. InMAP takes specific variable/column names for the pollutants, see the bottom of this page from the docs here. I believe the program will not recognize variable names with the "_ann" suffix. Also, the input emissions data need to be a shapefile with an associated geometry for each of the grid cells. I can't tell from the R screenshot if that is the case. I had to ask the authors for the projection information for the downscaled NEI data as the publicly available shapefiles did not include it. They directed me here: http://air.csiss.gmu.edu/nemo/assets/img/howtoread_v4.pdf. Hope this helps!

Talor

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[Chris Tessum]

Thanks Taylor, I believe this is the correct answer.

Chris

[Chris Tessum]

See here for more information: https://inmap.run/docs/emissions/#inmap-emissions

Also, apologies Talor for spelling your name wrong.

Chris