80 likes | 192 Views
Evaluation and model comparisons for Volatil Organic Compounds (VOC). Modelling Exercice. Olivier DUCLAUX Total Research Center CReS. Complexity of representation of the multitude of VOC in Atmospheric model.
E N D
Evaluation and model comparisons for Volatil Organic Compounds (VOC) Modelling Exercice Olivier DUCLAUX Total Research Center CReS
Complexity of representation of the multitude of VOC in Atmospheric model • In reality more than thousand VOC species, with a specific reactivity to oxidation and / or photolysis reaction • Primary and secondary pollutants • ESCOMPTE Emission inventory : +100 VOC • Computational time need a reduction of VOC model species • Operational model : 5 to 30 VOC species
Influence of chemical scheme on Ozone concentration : VOC chemistry is the main difference between different mechanism RAMS- CHIMIE2 Scheme MOCA RAMS- CHIMIE3 Scheme RACM
Repartition of VOCnM emission :Annual versus hot sunny day Annual inventory : Industry & waste treatment : 40 % Energy prod : 10 % Car Traffic : 15 % Nature : 35 % Specific hot & sunny day : Nature (terpenes + isoprene*) : > 70 % of VOCnm * isoprene : a part coming from gasoline car
Anthropogenic VOC AROMATIC : primary compounds , low to medium reactivity (MIR : Benz. 0.4 Tol. 3 Xyl. 7 ) RAMS- CHIMIE3 CHIMERE1 UAM- total MOCAGE1
Sum of Aldehyde : primary compounds & secondary compounds high reactivity ( MIR 5 – 7) RAMS- CHIMIE3 CHIMERE1 UAM- total MOCAGE1
MOCAGE1 RAMS- CHIMIE3 biogenic VOC ISOPRENE : primary compounds , high reactivity MIR : Isoprene 9 Terpen 4