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环境化学  2015 

秋季COS和DMS在草坪与大气间的交换

Keywords: 羰基硫,二甲基硫,草坪,大气,交换通量

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Abstract:

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0.75-14.5μg·m-2·h-1,对DMS的排放通量为0.05-0.35μg·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,COS的垂直分布也表明草坪对COS具有明显的吸收作用.

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