Abstract:A method to measure atmospheric stability index (ASI) by monitoring the natural radioactivity of radon and its shot-live decay products with OPSIS SM200 monitor was introduced. The index gives information about the dilution properties of the lower boundary layer and allows to highlight the relevant role of the dilution factor in determining pollution events. The measured ASI data had good agreement with the atmospheric stability classes calculated by Pasquill method. ASI can indicate the diurnal variation and long-term trends of atmospheric stability, as a useful tool to interpret pollution events, especially for primary pollutants. Measurement data taken in Lanzhou in 2007 showed that PM10 trend was consistent with the ASI trend, which indicates that mixing properties of lower boundary layer is the key factor determining primary pollutants’ concentration.
王芬娟, 张华, Maria Pia Ancora, 邓晓东. 通过测量氡的放射性来监测大气稳定度的新方法[J]. 中国环境科学, 2013, 33(4): 594-598.
WANG Fen-Juan, ZHANG Hua, Maria Pia Ancora, DENG Xiao-Dong. Measurement of atmospheric stability index by monitoring radon natural radioactivity. CHINA ENVIRONMENTAL SCIENCECE, 2013, 33(4): 594-598.