CMAQ Release Notes: Chemistry: Carbon Bond 6 Mechanism (CB6) with Hazardous Air Pollutants
Type of update: Documentation update
Release Version/Date: CMAQ version 5.5
Description See release note under Carbon Bond 6 Mechanism
William T. Hutzell, U.S. Environmental Protection Agency
Type of update: Science Update and New Feature
Release Version/Date: CMAQ version 5.4
Description The Multi-pollutant version of the cbr6 mechanism replaces the cb6mp_ae6_aq mechanism in version 5.3.3. The new mechanism is based on cb6r5_ae7_aq and is called cb6r5hap_ae7_aq. It includes the same toxic gas and aerosol species as the cb6mp_ae7_aq while adds (1) gas and aerosol reactive tracers for benzo[a]pyrene and (2) nonreactive tracers for PAHs lumped based on their Toxic Equivalency Factors.
Significance and Impact: Users can selectively model a wide range of Hazardous Air Pollutants based on the r5 version of the carbon bond 6 mechanisms in CMAQ 5.4.
| Merge Commit | Internal record |
|---|---|
| Merge for PR#887 | PR#887 |
| Merge for PR#731 | PR#731 |
| Merge for PR#722 | PR#722 |
| Merge for PR#684 | PR#684 |
- Instrumented Models
- MPAS-CMAQ Coupled Model
- WRF-CMAQ Coupled Model
- Chemistry
- Transport Processes
- Dry Deposition/Air-Surface Exchange
- Emissions Updates
- Process Analysis and Sulfur Tracking Model (STM)
- Structural Improvements
- Diagnostic Options
- Preprocessors
- PYTOOLS
- Postprocessors
- Utilities
- Stratospheric-Tropospheric Exchange (STE)