title: Determination and potential importance of diterpene (kaur-16-ene) emitted from dominant coniferous trees in Japan.
abstract: Reactive volatile organic compounds (VOCs) are known to affect atmospheric chemistry. Biogenic VOCs (BVOCs) have a significant impact on regional air quality due to their large emission rates and high reactivities. Diterpenes (most particularly, kaur-16-ene) were detected in all of the 205 enclosure air samples collected over multiple seasons at two different sites from Cryptomeria japonica and Chamaecyparis obtusa trees, the dominant coniferous trees in Japan,. The emission rate of kaur-16-ene, was determined to be from 0.01 to 7.1 μg dwg(-1) h(-1) (average: 0.61 μg dwg(-1) h(-1)) employing branch enclosure measurements using adsorbent sampling followed by solid phase-liquid extraction techniques. The emission rate was comparable to that of monoterpenes, which is known major BVOC emissions, collected from the same branches. In addition, total emission of kaur-16-ene at 30°C was estimated to exceed that of total anthropogenic VOC emissions.
authors.affiliation: Auto Oil and New Fuels Department, Japan Petroleum Energy Center, 4-3-9 Toranomon, Minato-Ku, Tokyo 105-0001, Japan. s-matsunaga@pecj.or.jp
authors.forename: Sou N
authors.initials: SN
authors.lastname: Matsunaga
authors.forename: Satoru
authors.initials: S
authors.lastname: Chatani
authors.forename: Seiji
authors.initials: S
authors.lastname: Nakatsuka
authors.forename: Dai
authors.initials: D
authors.lastname: Kusumoto
authors.forename: Katsuyoshi
authors.initials: K
authors.lastname: Kubota
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Utsumi
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Enoki
authors.forename: Akira
authors.initials: A
authors.lastname: Tani
authors.forename: Tsutom
authors.initials: T
authors.lastname: Hiura
mesh_terms: D029780:Chamaecyparis / Q000737:chemistry*; D032485:Cryptomeria / Q000737:chemistry*; D004224:Diterpenes / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification; D007564:Japan; D014197:Trees / Q000737:chemistry*; D055549:Volatile Organic Compounds / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification; D014835:Volatilization
chemical_list: D004224:Diterpenes; D055549:Volatile Organic Compounds