大气沉降向林地(小叶栎)输入硫素通量的观测  

Observation studies on the atmospheric sulphur deposited input flux to (Quercus Chenii) forestland.

作　　者：徐成凯[1] 胡正义[1] 蔡祖聪[1] 王体健[2] 何园球[1] 曹志洪[1] 

机构地区：[1]中国科学院南京土壤研究所,土壤与农业可持续发展国家重点实验室,江苏南京210008 [2]南京大学大气科学系,江苏南京210093

出　　处：《中国环境科学》2004年第3期345-349,共5页China Environmental Science

基　　金：973项目(G1999011805);中科院知识创新工程领域前沿项目(ISSASIP0205);土壤与农业可持续发展国家重点实验室联合资助

摘　　要：利用中国科学院红壤生态试验站森林小气候观测站(江西鹰潭)逐时气象梯度参数连续自动观测数据,采用阻力模式计算SO2、硫酸盐(SO42-)粒子的干沉降速率(Vd),结合大气SO2、SO42-粒子浓度现场测定,研究了该地2年大气硫沉降量.结果表明,2000年大气SO2和SO42-粒子时年Vd值分别为0.748cm/s、0.665cm/s;2002年分别为0.180cm/s、0.221cm/s.2000和2002年大气干沉降硫(SO2+SO42-粒子)通量分别为104.6kgS/(hm2a)和140.6kgS/(hm2a),SO2干沉降是大气干沉降主要贡献者,占98.38%和97.2%;大气沉降硫总量分别为150kgS/(hm2a)和185kgS/(hm2a);可见大气干沉降是大气硫沉降主要贡献者,分别占70%和76.2%.Atmospheric SO2 and SO42- particle dry deposition velocities (Vd) were calculated adopting resistance model and applying continuously automatic observing data of hourly meteorological grade parameter at forest small meteorological observation station, Experiment Station of Red Earth Ecology (Yingtan, Jiangxi), Chinese Academy of Sciences, the atmospheric sulfur deposition amount into the land in two years was studied with combining the field determination of atmospheric SO2, SO42- particle concentrations. The annually average Vd of SO2 and SO42- particle was 0.748cm/s and 0.665cm/s in 2000, and 0.180cm/s and 0.221cm/s in 2002 respectively. The deposition flux of sulfur (SO2+SO42- particle) was 104.6kg S/(hm2a) in 2000 and 2002 respectively, SO2 dry deposition as the main dedicator of the atmospheric dry deposition occupying 98.38% and 97.2%; and the total amount of the sulphur deposited was 150kg S/(hm2a) and 185kg S/(hm2a) respectively. It is clear that the atmospheric dry deposition is the main indicator of the atmospheric sulphur deposition, occupying 70% and 76.2% respectively.

关 键 词：大气硫沉降 干沉降速率 森林 二氧化硫 硫酸盐粒子 

分 类 号：X511[环境科学与工程—环境工程]