Exchange of carbonyl sulfide (COS) between wheat soil and atmosphere

The exchange of COS between wheat soil and atmosphere was investigated by using a dynamic enclosure. The investigated soil type acted as a significant sink for the trace gas COS. Atmospheric COS mixing ratios and temperature were found to be the physicochemical parameters controlling the uptake. The uptake reached maximum about 0.6×10~(-12) mol ?g~(-1) ?h~(-1) at 15-20℃ under natural ambient atmospheric conditions. The measured uptake values agree well with that calculated by Guenther algorithm.     

羰基硫(COS)在麦田土壤中的地气交换

利用动态箱法研究了COS在麦田土壤中的地气交换,结果表明麦田土壤为COS的重要汇.COS在麦田土壤中的沉降速率随COS的浓度增加而增大,与温度密切相关,在15~20℃范围内和实际大气情况下,COS在麦田土壤中的沉降速率达到最大值约为0.6×10^-12mol·g^-1·h^-1.实验测量COS在麦田土壤表面的沉降速率与温度的关系与Guenther简化算式计算结果十分吻合.