Abstract
This paper presents a mechanistic, fully dynamic, internally mixed, sectional aerosol module, the UCD Aerosol Module, which evolves from the Aerosol Inorganic Model (AIM). The UCD Aerosol Module employs three gas-to-particle mass transport schemes, replacement, coupled and uncoupled, and simplified aerosol thermodynamics to predict gas-particle partitioning, aerosol phase state and water content efficiently and reasonably. Aerosol dynamics is integrated using an Asynchronous Time-Stepping (ATS) integration method, where different sized particles integrate with different time scales. CMAQ-UCD is an implementation of the UCD Aerosol Module in the CMAQ modeling system. With all of these features, CMAQ-UCD is designed to be a computationally efficient and scientifically sound air quality model that predicts particulate mass concentrations and size distributions over urban or regional scales for regulatory and scientific purposes.
Original language | English (US) |
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Pages (from-to) | 3166-3178 |
Number of pages | 13 |
Journal | Atmospheric Environment |
Volume | 42 |
Issue number | 13 |
DOIs | |
State | Published - Apr 2008 |
Keywords
- Aerosols
- Air quality
- Particulate matter
- PM2.5
- Size distribution
- Thermodynamics
ASJC Scopus subject areas
- Atmospheric Science
- Environmental Science(all)
- Pollution