摘要
20 0 2年 5— 6月 ,分别在海拔 4 30 0m的定日和 5 0 0 0m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 7mBq·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。
During May to June 2002, ambient total suspended particulates (TSP) were sampled at Dingri (28^655?°N, 87.115?°E, 4?300?m a.s.l.) and at the north valley of Mt. Qomolangma (28.193?°N, 86.827?°E, 5?000?m a.s.l.). Be-7 radioactive concentrations of the TSP samples were between 0.76～1.7?mBq·m -3 STP. 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.
出处
《北京大学学报（自然科学版）》
CAS
CSCD
北大核心
2003年第4期462-466,共5页
Acta Scientiarum Naturalium Universitatis Pekinensis
基金
国家杰出青年基金 ( 4992 5 5 13)
教育部重点资助项目
关键词
放射性活度
臭氧
平流层
颗粒物
radioactivity
ozone
stratosphere
particulate
