Observations of oxidation products above a forest imply biogenic emissions of very reactive compounds
Open Access
- 20 January 2005
- journal article
- Published by Copernicus GmbH in Atmospheric Chemistry and Physics
- Vol. 5 (1) , 67-75
- https://doi.org/10.5194/acp-5-67-2005
Abstract
Vertical gradients of mixing ratios of volatile organic compounds have been measured in a Ponderosa pine forest in Central California (38.90° N, 120.63° W, 1315m). These measurements reveal large quantities of previously unreported oxidation products of short lived biogenic precursors. The emission of biogenic precursors must be in the range of 13-66µmol m-2h-1 to produce the observed oxidation products. That is 6-30 times the emissions of total monoterpenes observed above the forest canopy on a molar basis. These reactive precursors constitute a large fraction of biogenic emissions at this site, and are not included in current emission inventories. When oxidized by ozone they should efficiently produce secondary aerosol and hydroxyl radicals.Keywords
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