Abstract: During May to June 2002, ambient total suspended particulates (TSP) were sampled at Dingri (28.655°N, 87.115°E, 4300 m a.s.l.) and at the north valley of Mt. Qomolangma (28.193°N, 86.827°E, 5000 m a.s.l.). Be-7 radioactive concentrations of the TSP samples were between 0.76～1.7 mBq·m^-3STP. The results showed no evidence of contributions from stratosphere or upper troposphere transport to the high ozone concentrations on the surface during the observation period.

Key words: radioactivity, ozone, stratosphere, particulate

摘要： 2002年5-6月，分别在海拔4300m 的定日和5000m 的珠穆朗玛峰北坡采集了地面大气颗粒物，测量了颗粒物中Be-7的放射性活度浓度，Be-7浓度为0.76～1.7 mBq·m^{- 3}，表明观测期间平流层的输送对地表高臭氧浓度的贡献不明显。

关键词: 臭氧, 平流层, 颗粒物