Chemical mechanisms within CHIMERE present and future

1
Chemical mechanisms within CHIMERE present and
future

• Matthias BEEKMANN

2
The standard mechanism MELCHIOR

• describes
• Photo-oxidant formation in polluted and clean
  environments , including the free troposphere
• Can be coupled with inorganic and organic
  aerosols modules (NH3, HNO3, SO2-gt H2SO4, VOC
  OH)

3
Peroxyles/peroxydes Nitrates Updating of aromatic
and biogenic VOC oxidation
Reduction Operator approach
4
MELCHIOR treatment of VOCs

• 8 primary VOCs(explicit or familily
  representatves)
• Methane
• Ethane
• N-butane
• Ethene
• Propene
• Ortho-xylene
• Isoprene
• ?-pinene

• 12 (10) secondary VOCs(explicit or familily
  representatves)
• Formaldehyde
• Acetaldehyde
• Methyl-ethyl-ketone
• Glyoxal
• Methyl-glyoxal
• Dimethyl-glyoxal,
• 4-oxo-2-penatanal
• 5-methyl-3H-furan-2-one
• Methyl-vinyl-ketone
• Methyl-acroleine
• (Methanol)
• (Ethanol)

5
Comparison with RACM
6
Comparaison entre MELCHIOR / EMEP / RACM (2)
7
Comparaison entre MELCHIOR / EMEP / RACM (3)
8
Comparaison entre MELCHIOR / EMEP / RACM (4)
ENOx 0.32 ppb/ day ECOV 0.44 ppbC/day
9
FUTURE POSSIBILITIES
Implantation in CHIMERE