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http://dx.doi.org/10.5532/KJAFM.2015.17.3.217

Measurements of Isoprene and Monoterpenes at Mt. Taehwa and Estimation of Their Emissions  

Kim, Hakyoung (Department of Earth and Environmental Science, Korea University)
Lee, Meehye (Department of Earth and Environmental Science, Korea University)
Kim, Saewung (University of California at Irvine, Department of Earth System Sciences)
Guenther, Alex.B. (University of California at Irvine, Department of Earth System Sciences)
Park, Jungmin (National Institute of Environmental Research)
Cho, Gangnam (National Institute of Environmental Research)
Kim, Hyun Seok (National Center for AgroMeteorology)
Publication Information
Korean Journal of Agricultural and Forest Meteorology / v.17, no.3, 2015 , pp. 217-226 More about this Journal
Abstract
To investigate the distributions of BVOCs (Biogenic Volatile Organic Compounds) from mountain near mega city and their role in forest atmospheric, BVOCs and their oxidized species were measured at a 41 m tower in Mt. Taehwa during May, June and August 2013. A proton transfer reaction-mass spectrometer (PTR-MS) was used to quantify isoprene and monoterpenes. In conjunction with BVOCs, $O_3$, meteorological parameters, PAR (Photosynthetically Active Radiation) and LAI (Leaf Area Index) were measured. The average concentrations of isoprene and monoterpenes were 0.71 ppbv and 0.17 ppbv, respectively. BVOCs showed higher concentrations in the early summer (June) compared to the late summer (August). Isoprene started increasing at 2 PM and reached the maximum concentration around 5 PM. In contrast, monoterpenes concentrations began to increase 4 PM and stayed high at night. The $O_3$ maximum was generally found at 3 PM and remained high until 5 PM or later, which was concurrent with the enhancement of $O_3$. The concentrations of BVOCs were higher below canopy (18 m) than above canopy, which indicated these species were produced by trees. At night, monoterpenes concentrations were negatively correlated with these of $O_3$ below canopy. Using MEGAN (Model of Emissions of Gases and Aerosols from Nature), the emissions of isoprene and monoterpenes were estimated at 1.1 ton/year and 0.9 ton/year, respectively at Mt. Taehwa.
Keywords
Isoprene; Monoterpenes; BVOCs; Mt. Taehwa; MEGAN;
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Times Cited By KSCI : 4  (Citation Analysis)
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