臭氧在冰晶及硫酸铵和亚硫酸铵渗溶冰晶上的粘着系数

The sticking coefficients of ozone on ice and doped ice

利用流动管式反应器 ,在 2 2 0— 2 6 0K温度范围内 ,实验测量了臭氧在低温冰晶及硫酸铵和亚硫酸铵渗溶冰晶表面上的粘着系数 .结果表明 :臭氧在低温冰晶表面上的粘着系数随温度升高而增大 ,其粘着系数为 1.3× 10 -7— 2 .7× 10 -6;臭氧在硫酸铵和亚硫酸铵渗溶冰晶表面上的粘着系数与二者浓度呈非线性关系 ;利用实验结果估算了臭氧在极地平流层云中存留寿命约为 5 6d ,臭氧在主要组成为水的冰晶表面上的损耗不容忽视 .

By flow reactor the sticking coefficients of ozone on ice and doped ice surfaces were measured over the temperature range from 220K to 260K. The results indicate: the sticking coefficients of ozone on ice is in the range from 1.3×10 -7 to 2.7×10 -6 , and increases with temperature ; the sticking coefficients of ozone on (NH 4) 2SO 4 and (NH 4) 2SO 3 doped ice surfaces show nonlinear relationship with the concentrations of (NH 4) 2SO 4 and (NH 4) 2SO 3; the residual life time of ozone on ice estimated by the experimental data is about 56 days, the loss of ozone on particles mainly composed water cannot be ignored.