제주지역 주요 침엽수에서 배출되는 VOCs 배출특성

Abstract

Abstract Emission rate of monoterpene and isoprene was measured in five commonly growing tree species of conifers(Pinus thunbergii, Abies koreana, Cryptomeria japonica, Pinus densiflora, Chamaecyparis obtusa) at the Halla mountain sites. Dynamic flow enclosure technique was used and gas samples were collected into Tenax tube. The highest and lowest hourly emission rate was observed in Abies koreana (1.86 ㎍/gdw/hr) and Chamaecyparis obtusa (0.52 ㎍/gdw/hr), respectively. The major species of monoterpene from pine trees were α-pinene, β-pinene, β-phellandrene, myrcene. Particularly, d-limonene was abundant in Abies koreana but α-pinene, d 3 -carene and sabinene was in Cryptomeria japonica. Emission rates of isoprene show less significant than those of monoterpene. And also seasonal emission rates of monoterpene were dependent on environmental factors such as temperature.Key Words :BVOCs, Emission rate, Monoterpene, Isoprene, Conifer 1. 서 론 1) 자연에서 배출되는 휘발성 유기화합물의 총량은 지구 전체로 1,150 Tg-C/yr 정도로 추정하고 있으며, 이중 821 Tg-C/yr이 식물에서 배출하는 것으로 보고되고 있고 자연에서의 배출총량은 인위적인 배출량보다 7배 이상 많은 것으로 추정하고 있다(Guenther 등, 1994; Guenther 등, 1995). 우리나라에서는 자연식생에서 배출되는 휘발성유기화합물은 총 431천 톤/년으