珠江三角洲地区天然源碳氢化合物的研究

使用封闭式采样法分析测定了珠江三角洲地区主要优势树种天然碳氢化合物的排放速率,用源调查法推算出该地区天然源碳氢化合物的排放通量,测定树种包括马尾松、湿地松、黎蒴、尾叶桉、南洋楹、大叶相思、荷木.经分析,所测树木排放的碳氢化合物主要有萜烯类和异戊二烯,其中鉴定出的萜烯有a-蒎烯,b-蒎烯,蒈烯,莰烯,桧烯,柠檬烯,罗勒烯等.同时,按9km9km的网格精度估算了珠江三角洲地区森林面积分布数据,根据测定的排放因子以及其他相关资料,首次对该地区天然源碳氢化合物的排放量进行了估算,计算出全年森林向大气中释放碳氢化合物19.610⁴t,占该地区大气中碳氢化合物排放总量的57%.

Study on hydrocarbon compounds from natural source in the Pearl River Delta area.

Using the enclosure sampling technique, the emission rates of natural hydrocarbon compounds (HC) from the major privileged species of trees in the Pearl River Della area were analyzed and measured and using the sourceinvestigation method, the flux of HC from the natural sources in the area was infered. These tree species included Pinus massonia, Pinus elliotii, Castanopsis fissa, Eucalyptus robusta, Albizia folcata, Acacia sp. and Schima superba. The HC from the measured tree included mainly isoprene and terpenes, in which the terpenes identified were a-Pin, b-Pin, Cam, Car, Ter, Limo and Oci et al. The report evaluated, by the precision of 9km9km grid, the distribution data of forestcoverage in the area, and according to the emission factor measured and other related materials, maked an evaluation of the emission amount of natural HC in the area for the first time that the yearly amount emitted by forest into theatmosphere was 196000 tons, which occupied 57% of the total HC in the area.