秋季COS和DMS在草坪与大气间的交换  

THE EXCHANGE OF CARBONYL SULFIDE AND DIMETHYL SULFIDE BETWEEN LAWN AND ATMOSPHERE IN FALL

作　　者：耿春梅[1] 吴海[1] 牟玉静[1] 王美珍[2] 

机构地区：[1]中国科学院生态环境研究中心,北京100085 [2]北京科技大学,北京100083

出　　处：《环境化学》2004年第1期12-16,共5页Environmental Chemistry

基　　金：国家自然科学基金资助项目 ( 2 0 2 770 44;2 0 1 770 2 8);973项目( 2 0 0 2CB41 0 80 0 );中国科学院知识创新方向性项目(KZCX3 SW 42 4;KZCX2 2 0 4)

摘　　要：利用静态箱法研究了羰基硫 (COS)和二甲基硫 (DMS)在绿化草坪与大气之间的交换 .在秋季 ,草坪对COS的吸收通量为 0 75— 1 4 5 μg·m- 2 ·h- 1 ,对DMS的排放通量为0 0 5— 0 35 μg·m- 2 ·h- 1 .COS和DMS的交换通量与环境温度、光照及初始浓度等因素有关 ,其中 ,周围大气COS的浓度对草坪吸收COS的影响最为明显 .草坪对COS的吸收通量与DMS的排放通量呈正相关 ,相关系数 (R2 )大于 0 7.此外 。The exchanging fluxes of carbonyl sulfide(COS)and dimethyl sulfide(DMS)were investigated by using static method between lawn and atmosphere.In fall,the COS uptake rates for lawn were 0 75—14 5μg·m -2 ·h -1 and the DMS emission rates were 0 05—0 35μg·m -2 ·h -1 .The exchange rates of COS and DMS were determined by air temperature,light,ambient concentration of COS and so on.The effect of ambient concentration of COS on the exchanging flux of COS was the key factor among the investigated factors.The COS uptake fluxes and DMS emission fluxes for lawn had good positive correlation,and the coefficient( R 2)is better than 0 7.In addition,the vertical distribution of COS also showed significant COS uptake by lawn.

关 键 词：羰基硫 二甲基硫 草坪 大气 交换通量 

分 类 号：X132[环境科学与工程—环境科学]