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Reviewing Emissions Modeling Profiles and Using Google Earth to review NonEGUs.

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Mark Janssen, LADCO Emissions Director

https://www.ladco.org/technical/modeling-results/2022_eic/#Reviews/Profile_Review

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Thursday, April 18th 2024

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SMOKE temporal, spatial, speciation profiles.

  • Original Code written by Zac Adelman
  • Most states ever see what profiles are used by the models.
  • All the profiles you will see are definted by SCC code.
    • Some sectors/sources use facility/unit specific profiles.
    • Sometimes the profiles are embedded in the NEI(RWC, CEM, Nonroad)

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4415 West Harrison St, Suite 548 Hillside, IL

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Temporal Profiles.

  • How to make an annual emissions inventory into monthly, day of week, and hourly emissions. Usually SCC specific profiles.
  • Monthly: 12 values usually even across months. Since ozone is summer only, this can be most influential. See Motorboats vs Snowmobiles
  • Day of week: Show weekend/weekday differences. LADCO work shows weekend chemistry different and sometimes more condusive to Ozone.
  • Hour of Day: Moving Emissions to specific hours. Most ozone producing emissions happen in morning.

4415 West Harrison St, Suite 548 Hillside, IL

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Spatial Attributes of emissions

  • Spatial Surrogates are used to take national/state emissions to counties.
    • SCC specific and many categories use county specific activity.
  • Spatial Surrogates are also used to take county level emissions down to individual modeling cells(12km, 4km, 1.3km)
    • This is the one that we are interested in here.
    • Most influential in large centrally located counties.

4415 West Harrison St, Suite 548 Hillside, IL

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Chemical Speciation Profiles.

  • Speciation profiles are used to create carbon bond group emissions from VOC and PM2.5.
  • Carbon bond groups are collections of photochemically similar compounds.
  • Maximum Incremental Reactivity(Bill Carter) are factors that estimate the amount of ozone that would be create from a mass weight of a chemical species.
  • We have simplified MIR values for the carbon bond groups.
  • Higher values result in higher ozone formation potential.

4415 West Harrison St, Suite 548 Hillside, IL

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Descriptive Elements

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Descriptive Fields

  • VOC – Nonpt,
  • SCC: 2802004001, Silage
  • Ranked 6 for this pollutant/sector
  • NOX, VOC, PM2.5 Emissions

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Spatial Surrogate

  • The name and number of the spatial surrogate: 4011, large cattle operations.
  • Don’t trust or use the map. Everything to review is county to cell. Version 2 of this chart or some future EPA tool may have county specific plots which are needed.

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Monthly Profiles

  • Important because it defines winter/summer split
  • Easiest to understand and find.
  • Temporal often embedded in inventory file or created from information in inventory(eg. Hours/Year in point sources)

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Day of Week Profiles

  • Weekend vs Weekday

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Hourly Profiles

  • Based on local time zone and adjusted to central time zone in SMOKE.
  • Temporal often embedded in inventory file or created from information in inventory(eg. Hours/Year in point sources)

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Speciation Profile

  • Profile name
  • MIR – Maximum Incremental Reactivity.
    • Δ O3/ Δ VOC
    • Applied by CB group, Best way is by chemical species
    • Higher MIR more reactive

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Reviewing Speciation Profile

  • Take profile to EPA SPECIATE and review the component species
  • Look at Mass fractions by chemical species and see if those concur with your concern
  • Suggest an alternative or build/collect an alliterative.

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4415 West Harrison St, Suite 548 Hillside, IL

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What if a chart is missing�To make these charts it must be SCC specific

  • Spatial
    • Is it a point source. Those don’t have surrogates
  • Temporal
    • Is that part of temporal derived somewhere else
      • Month for Nonroad
      • Hourly for CEM or Fire sources
      • All for point sources where hours/year define profile
  • Speciation
    • Does the pollutant have a profile(ie NOX)
    • Is speciation defined in inventory(nonroad, ptfire-rx, ptfire-wild)
  • Question: So why no charts for EGU NOX?

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What are LADCO’s priority in order

  • Is month of year profile OK and do I have better
  • Is day of week profile OK and do I have better
  • Is hour of day profile OK and do I have better.
  • Is Speciation/MIR impact my understanding of the source.
  • Is there a better speciation profile avaliable
  • Is an alternate spatial surrogate available

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LADCO KML file for point source review

  • KML file can be used in Google Earth
    • https://drive.google.com/file/d/10J4m95BJixIa5yiywYMnG-f3AGbh7qd-/view?usp=sharing
  • Is NON-EGU Point > 100 TPY of Criteria Pollutants
  • Review the Locations of large sources
    • Anything less than 1 km is probably overkill
  • Review the Mass of large sources.
    • Problem of extra decimal places in activity/emissions

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Coming Soon….

  • ZAC’s R Shiny tool to review sectors by state.

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