Airport Sector Availability in 2022 CRACMM Emissions

Emissions
1

Hello,

I have a plan to use the 2022 CRACMM chemical mechanism and have a question regarding the treatment of airport emissions.

  1. Whether the provided 2022 CRACMM emissions inventory includes a airport sector? I downloaded from Making sure you're not a bot!

  2. If an airport sector exists, what is the recommended way to extract or isolate this sector from the CMAQ-ready emissions files?

Thank you.

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CRACMM emission-separated sectors

2

Airports are lumped with other sources in the merged 2-D emissions at merged_nobeis_norwc. Do you need that sector separate? Aircraft organic aerosol emissions are represented as semivolatile (Table S9).

3

Thank you for answering the question.

I want to make a background emissions without the airport sector.

With Table S9, I could calculate the speciation but not the quantity of airport emissions.

Do you have any ideas?

4

Yes

Yes I need airport emission as separated file.

5

Thank you for airport emissions.

  1. Still I would like to get Dec 2021 airport emission for pre-run for Jan 2022.
  2. Also could you upload beis emission as well in CRACMM folder?

Thank you so much for your help.

6

@lizadams is working on posting the airport emission files for 2022. We may keep them in a separate location as they are not needed by default as they are in other files.

7

@Havala.Pye

Thank you.

Do you guys have a plan to provide rwc only, not airports and beis for CRACMM?

CB6 usually provides with pre-merged sectors for rwc, airports, beis as default with pre-run period for January.

Thank you for your work!

8

Inputs produced by ORD (which include these) do not have premerged biogenics/beis. ORD configurations generally rely on the in-line BEIS emissions. Input files for inline BEIS should be in the surface or misc folders. I’ll follow-up on the pre-merged sectors.

9

I will try to use in-line BEIS emissions

10

@Havala.Pye

I have a quick question regarding CRACMMv2 about aircraft sources in your 2026 ES&T paper.

Based on Table S9, it appears that aircraft POA is speciated only into the lowest volatility alkane species. Am I interpreting this correctly?

If so, does this also mean that there are no aircraft S/IVOC gas phase emissions (or SVOC/IVOC speciation) included in the inventory? In other words, aircraft emissions are represented only as LVOC in CRACMMv2, without emitted S/IVOC precursors available for SOA formation.

I wanted to confirm that I am interpreting the speciation correctly