title: Seasonal variations of monoterpene emissions from Pinus densiflora in East Asia.
abstract: The emission rates and compositions of monoterpene from Pinus densiflora were investigated in the Gumsung (GM) and Worak (WM) mountains. The standard emission rates (ERs: ERs is the monoterpene emission rate at standard temperature, 30 degrees C) from P. densiflora ranged from 0.817 to 1.704 (microgC/gdw-h). The ERs and beta-values of total monoterpene were measured at the two study sites (GM and WM). In the spring and summer, the ERs were the highest, while relatively low values (<0.058microgC/gdw-h) were measured in the autumn and winter. In GM and WM sites the beta-value obtained for the different seasons ranged from 0.047 to 0.179, with an average of 0.09. The major monoterpene compounds from P. densiflora were alpha-pinene, myrcene, beta-phellandrene, d-limonene and alpha-terpinene. The fractional compositions of individual monoterpene compounds were significantly different between the two test sites in the summer and winter. The ERs of the older group (31-40 years) were higher than those in the younger group (21-30 years). However, the monoterpene compositions were similar between the two age groups.
authors.affiliation: Department of Environmental Engineering, Konkuk University, Seoul 143-701, South Korea.
authors.forename: Jun-Ho
authors.initials: JH
authors.lastname: Lim
authors.forename: Jo-Chun
authors.initials: JC
authors.lastname: Kim
authors.forename: Ki-Joon
authors.initials: KJ
authors.lastname: Kim
authors.forename: Youn-Suk
authors.initials: YS
authors.lastname: Son
authors.forename: Young
authors.initials: Y
authors.lastname: Sunwoo
authors.forename: Jin-Seok
authors.initials: JS
authors.lastname: Han
mesh_terms: D000081008:Bicyclic Monoterpenes; D005843:Geography; D007723:Korea; D039821:Monoterpenes / Q000032:analysis* / Q000737:chemistry; D028223:Pinus / Q000378:metabolism*; D012621:Seasons; D014835:Volatilization
chemical_list: D000081008:Bicyclic Monoterpenes; D039821:Monoterpenes; C005451:alpha-pinene