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论述气象因素对土壤中氡气浓度的影响规律。一年的定点观测结果表明,土壤氡浓度在一年四季内变化明显,其变化的总规律是:春、夏浓度低,夏季最低;秋、冬浓度高,冬季最高。降雨、降雪常引起浓度值的骤然升高;而0℃附近,特别是低于0℃的条件下,浓度值大幅度地降低。除有季节性的变化外,尚有日变,其变化规律是:中午浓度低,早晚浓度高。在垂向分布上,存在一个最佳观测深度,在该深度上,氡浓度值最大,且日变化小。这一深度为65—75cm。最后提出了减小和消除气象影响的几项措施。
Discussion on the Influence of Meteorological Factors on Radon Concentration in Soil. One-year fixed-point observations show that soil radon concentration changes significantly throughout the year, the general rule of its change is: spring and summer concentrations are low, the lowest in summer; autumn and winter concentrations high and winter highest. Rainfall and snowfall often cause a sudden increase in the concentration value; while near 0 ℃, especially below 0 ℃, the concentration decreases sharply. In addition to seasonal changes, there are daily changes, the law of change is: low concentration at noon, morning and evening concentrations high. In the vertical distribution, there is an optimal observation depth at which radon concentration is the largest and the diurnal variation is small. This depth is 65-75cm. Finally, several measures to reduce and eliminate the meteorological impact are put forward.