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Evaluation and model comparisons for Volatil Organic Compounds (VOC)

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.

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Evaluation and model comparisons for Volatil Organic Compounds (VOC)

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  1. Evaluation and model comparisons for Volatil Organic Compounds (VOC) Modelling Exercice Olivier DUCLAUX Total Research Center CReS

  2. 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

  3. Influence of chemical scheme on Ozone concentration : VOC chemistry is the main difference between different mechanism RAMS- CHIMIE2 Scheme MOCA RAMS- CHIMIE3 Scheme RACM

  4. 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

  5. Anthropogenic VOC AROMATIC : primary compounds , low to medium reactivity (MIR : Benz. 0.4 Tol. 3 Xyl. 7 ) RAMS- CHIMIE3 CHIMERE1 UAM- total MOCAGE1

  6. Sum of Aldehyde : primary compounds & secondary compounds high reactivity ( MIR 5 – 7) RAMS- CHIMIE3 CHIMERE1 UAM- total MOCAGE1

  7. MOCAGE1 RAMS- CHIMIE3 biogenic VOC ISOPRENE : primary compounds , high reactivity MIR : Isoprene 9 Terpen 4

  8. Forwards : VOC measurements comparisons vs Model species

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