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As part of EPA’s routine annual screening-level assessment of air toxics, air quality modeling combining EPA’s CMAQ photochemical model with EPA’s preferred near-field dispersion model, AERMOD is used to characterize ambient air quality for risk and noncancer hazards for over 180 air toxics. The combining of the two models’ outputs uses a hybrid technique that combines CMAQ’s long range transport and photochemistry with AERMOD’s ability to characterize spatial gradients around emission sources. We will discuss this technique and provide evaluations of the performance of the hybrid technique.

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CMAQ-AERMOD Hybrid Modeling for EPA’s AirToxScreen Toxics Assessment

  • 会议论文

  • 发表日期：

    2025年

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  • James Thurman,
  • Sharon Phillips,
  • Alyssa Piliero,
  • Art Diem,
  • Alison Eyth,
  • Caroline Farkas,
  • Jeanette Reyes,
  • Matt Woody

摘要

As part of EPA’s routine annual screening-level assessment of air toxics, air quality modeling combining EPA’s CMAQ photochemical model with EPA’s preferred near-field dispersion model, AERMOD is used to characterize ambient air quality for risk and noncancer hazards for over 180 air toxics. The combining of the two models’ outputs uses a hybrid technique that combines CMAQ’s long range transport and photochemistry with AERMOD’s ability to characterize spatial gradients around emission sources. We will discuss this technique and provide evaluations of the performance of the hybrid technique.