Lumped chemical mechanism

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lumped chemical mechanism

A simplified atmospheric chemical model, most commonly used for urban airshed models.

In a lumped mechanism, organic compounds of similar chemical formula are grouped or "lumped" together and treated as a single representative species. For example, all aldehydes (acetaldehyde, propionaldehyde, etc.) might be treated as a single molecule of formula RCHO, which undergoes chemical reactions representative of the aldehydes.

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