基于树种蓄积量的中国森林VOC排放估算  

Estimation of VOC Emission from Forests in China Based on the Volume of Tree Species

作　　者：张钢锋[1] 谢绍东[1] 

机构地区：[1]北京大学环境科学与工程学院,环境模拟与污染控制国家联合重点实验室,北京100871

出　　处：《环境科学》2009年第10期2816-2822,共7页Environmental Science

基　　金：国家高技术研究发展计划(863)项目(2006AA06A306);环境保护公益性行业科研专项(200709001)

摘　　要：以中国森林优势树种为对象,应用《全国森林资源统计》提供的林分优势树种蓄积量资料和Guenther提出的光温影响模型,估算各优势树种的VOC排放量,建立了中国森林生态系统的VOC排放清单,并探讨了森林源VOC在不同时空和不同龄级林分中的分配规律.结果表明,中国森林VOC总排放量为8 565.76 Gg,其中异戊二烯5 689.38 Gg(66.42%),单萜烯1 343.95 Gg(15.69%),其他VOC 1 532.43 Gg(17.89%);不同树种的VOC排放量差异较大,栎类、云杉、马尾松等为主要贡献树种,贡献率分别为45.22%、6.34%和5.22%;西南和东北地区为中国森林VOC主要排放区域,云南、四川、黑龙江、吉林、陕西5省排放最多,分别占全国总量的15.09%、12.58%、10.35%、7.49%和7.37%;森林VOC排放存在非常强的季节性变化,夏季排放量最大,占全年的56.66%;不同龄级林分对VOC排放的贡献有所不同,中龄林贡献最多,占森林排放总量的38.84%.Applying the volume data of dominant trees from statistics on the national forest resources, volatile organic compounds （VOC） emissions of each main tree species in China were estimated based on the light-temperature model put forward by Guenther. China＇s VOC emission inventory for forest was established, and the space-time and age-class distributions of VOC emission were analyzed. The results show that the total VOC emissions from forests in China are 8 565.76 Gg, of which isoprene is 5 689.38 Gg （66.42%）, monoterpenes is 1 343.95 Gg （15.69%）, and other VOC is 1 532.43 Gg （17.89%）. VOC emissions have significant species variation. Quercus is the main species responsible for emission, contributing 45.22% of the total, followed by Picea and Pinus massoniana with 6.34% and 5.22%, respectively. Southwest and Northeast China are the major emission regions. In specific, Yunnan, Sichuan, Heilongjiang, Jilin and Shaanxi are the top five provinces producing the most VOC emissions from forests, and their contributions to the total are 15.09%, 12.58%, 10.35%, 7.49% and 7.37%, respectively. Emissions from these five provinces occupy more than half （52.88%） of the national emissions. Besides, VOC emissions show remarkable seasonal variation. Emissions in summer are the largest, accounting for 56.66% of the annual. Forests of different ages have different emission contribution. Half-mature forests play a key role and contribute 38.84% of the total emission from forests.

关 键 词：森林 树种 挥发性有机物 估算 排放清单 

分 类 号：X511[环境科学与工程—环境工程]