基于动态模型的四川盆地植物挥发性有机物排放

Emission of biogenic volatile organic compounds in Sichuan Basin using a dynamic model

本文在Guenther提出的经典天然源模型的基础上,结合WRF-CHEM简单天然源算法,针对气象变化和CMAQ模型数据格式特点,对BVOCs的算法进行了适当修正和改良,开发了可直接用于空气质量模型的BVOCs动态排放模型.研究结果表明,四川盆地2015年异戊二烯和单萜烯的年排放量分别为5.79×10^(-5)Tg C和3.05×10^(-5)Tg C,月排放具有显著差异;四川盆地植物异戊二烯、萜烯的排放量空间分布很好地反映了四川盆地的植被分布情况,异戊二烯、萜烯排放主要集中在盆地边缘的高山地区,两个物种的高浓度排放主要集中在气温较高、日照较强的夏季和初秋季节,且均在7月达到月均排放量的最大值.本研究建立的动态排放模型能够为空气质量模型提供一种快速衡算BVOCs排放的方法,具备一定的实用性.

An emission model for biogenic volatile organic compounds（ BVOCs） was established in this paper based on the classic Guenther scheme and WRF-CHEM,which can be used to estimate BVOCs dynamically by considering the meteorological effects on emissions. Algorithms were modified so the that results could be used in air quality models directly. Model results showed that the total emissions of isoprene and terpene in Sichuan Basin were 5.79×10^-5 Tg C and 3.05×10^-5 Tg C in 2015 respectively,with significant monthly differences. Isoprene and terpene emissions were concentrated in the mountainous region of the basin edge. Affected by temperature and solar radiation,the monthly emission peeked in July. The dynamic model might be useful as a fast BVOC estimation tool for air quality models.