二氧化硫干沉降的测量  

The Measurement of SO_2 Dry Deposition

作　　者：范思泓 洪钟祥[1] 周乐义[1] 沈剑青[1] 

机构地区：[1]中国科学院大气物理研究所,北京100029

出　　处：《大气科学》1993年第1期106-111,共6页Chinese Journal of Atmospheric Sciences

摘　　要：通过在成都市郊对二氧化硫气体浓度和气象要素进行同步梯度观测,得到二氧化硫的干沉降速度.总结了影响二氧化硫干沉降速度的主要因子及日变化规律,发现其干沉降速度白天大于夜间,并在白天午后15时前后出现极大值,夜间2时前后出现极小值,平均沉降速度为1—1.5cm/s,且随稳定度的增加干沉降速度减小.The gradients of the SO2 concentration and other meteorological factors were measured at the suburb of Chengdu in 1989 . Then the velocity of SO2 dry deposition is calculated . The velocity of the SO2 dry deposition during daytime is larger than that during night. The maximum value is found at about three o'clock in the afternoon and the minimum value is at about two o 'clock at night. The average value is about 1 - 1.5 cm/s . The velocity of SO2 dry deposition decreases when the atmospheric stability increases .

关 键 词：二氧化硫 干沉降 速度 稳定度 大气 

分 类 号：P421.2[天文地球—大气科学及气象学]