Estimating the segregation intensity of isoprene and OH over a South-East Asian tropical rainforest.

摘要: Biogenic Volatile Organic Compounds (BVOCs) such as isoprene constitute a large proportion of the global oxidant sink, whilst their oxidation products contribute to processes ozone production and secondary organic aerosol formation. However, over tropical rainforest, where 50% emissions BVOCs are believed occur, atmospheric chemistry models have been unable accurately simulate simultaneously measured daytime concentration that its principle oxidant, OH. It has previously shown inefficient mixing within convective boundary layer leads segregation A reduction in effective rate reaction between these compounds is one way capture this effect which cannot resolve fine-scale segregation. Recent studies comparing global/box with field measurements suggested may be 50%; at upper limit calculated using eddy simulation models. To date only campaign worldwide co-located OH necessary temporal resolution calculate compounds. However many campaigns recorded sufficiently high small-scale fluctuations concentration. Using box model an approach discretises according spectrum concentrations measured, we attempt develop method estimate intensity from high-frequency timeseries hence South-East Asian rainforest.