Difference between revisions of "Bromine chemistry mechanism"
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Bromine chemistry has been added as an option to run with SMVGEAR or KPP in v.8-03-01 as an extension to the standard model's full chemistry simulation. Important features include: | Bromine chemistry has been added as an option to run with SMVGEAR or KPP in v.8-03-01 as an extension to the standard model's full chemistry simulation. Important features include: | ||
| − | + | #Add 10 bromine tracers: Br2, Br, BrO, HOBr, HBr, BrNO2, BrONO2, CHBr3, CH2Br2, and CH3Br | |
| − | + | #4 source gases: | |
| − | + | ##CH3Br: PBL concentrations are set to average CMDL measured concentrations prior to each chemistry step. | |
| − | + | ##Very short lived (VSL) source gases: | |
| − | + | ##*CH2Br2 and CHBr3. These account for > 80% of the VSL organic bromine through the troposphere (WMO, 2007). | |
| − | + | ##*Emissions are taken from Q. Liang et al. [2010] + a seasonal scaling for CHBr3 at lat > 30N described in J. Parrella et al. [in prep.] | |
| − | + | ##**429 Gg CHBr3 / yr; 62 Gg CH2Br2 / yr | |
| − | + | ##Sea-salt debromination: | |
| − | + | ###Largely follows Yang et al. [2005], treating the debromination as an emission of Br2, constrained to measured bromide depletion factors. | |
| − | + | ###1.4 Tg Br2 / yr using the Monahan sea-salt production function and coarse aerosol bin range of 0.5 - 10 um. | |
| − | + | # Wet and dry deposition for HBr, HOBr, and BrONO2. | |
Code should be made available soon. This wiki page is under construction, but feel free to contact Justin Parrella (parrella@fas.harvard.edu) with any questions about the code. | Code should be made available soon. This wiki page is under construction, but feel free to contact Justin Parrella (parrella@fas.harvard.edu) with any questions about the code. | ||
Revision as of 21:12, 6 July 2010
NOTE: Page under construction!
Contents
Overview
Bromine chemistry has been added as an option to run with SMVGEAR or KPP in v.8-03-01 as an extension to the standard model's full chemistry simulation. Important features include:
- Add 10 bromine tracers: Br2, Br, BrO, HOBr, HBr, BrNO2, BrONO2, CHBr3, CH2Br2, and CH3Br
- 4 source gases:
- CH3Br: PBL concentrations are set to average CMDL measured concentrations prior to each chemistry step.
- Very short lived (VSL) source gases:
- CH2Br2 and CHBr3. These account for > 80% of the VSL organic bromine through the troposphere (WMO, 2007).
- Emissions are taken from Q. Liang et al. [2010] + a seasonal scaling for CHBr3 at lat > 30N described in J. Parrella et al. [in prep.]
- 429 Gg CHBr3 / yr; 62 Gg CH2Br2 / yr
- Sea-salt debromination:
- Largely follows Yang et al. [2005], treating the debromination as an emission of Br2, constrained to measured bromide depletion factors.
- 1.4 Tg Br2 / yr using the Monahan sea-salt production function and coarse aerosol bin range of 0.5 - 10 um.
- Wet and dry deposition for HBr, HOBr, and BrONO2.
Code should be made available soon. This wiki page is under construction, but feel free to contact Justin Parrella (parrella@fas.harvard.edu) with any questions about the code.
