摘要
1998年11月～1999年10月间,利用中国科学院红壤站(江西鹰潭)农田小气候分站进行了全年逐时气象资料收集,通过阻力模式求算SO2和SO42-的干沉降速度,结合大气中SO2、硫酸盐(SO42-)粒子和雨水的收集和测定,定量研究了大气沉降向农田生态系统的硫输入.结果表明,12个月大气硫沉降总量为94.9 kg S/hm2,其中大气中硫干沉降量(SO2+SO42-粒子干沉降)占81.9%.大气中SO2干沉降是大气干沉降的主要贡献者,占大气硫干沉降总量93%.并对不同季节及不同的作物生长期间硫的沉降动态进行了分析、比较.
Atmospheric SO2, and SO42- particle dry deposition velocities were estimated via resistance model based on the collection of hourly meteorological data, utilizing farmland micrometeorological experiment sub-station, experimentstation of red earth ecology, Yingtan, Jiangxi, Chinese Academy of Sciences from Nov. 1998 to Oct. 1999, and sulphur input by atmospheric deposition into farmland ecosystems was studied quantitatively through combining with collection and determination of atmospheric SO2, SO42- particle and rainwater. Results indicated total atmospheric sulphur deposition was 94.9kg S/hm2 in twelve months, 81.9% of which was resulted from dry deposition of SO2 and SO42- particles. SO2 dry deposition dominated in the deposition, accounting for 93% of total sulphur dry deposition. Dynamics of sulphurdeposition in various seasons and crop bearing stages had been analyzed and compared.
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
2002年第1期11-15,共5页
China Environmental Science
基金
973项目(G1999011805)
国家自然科学基金资助项目(49771015)
中国科学院红壤生态试验站资助项目
