北京大学学报(自然科学版)

珠穆朗玛峰地区大气示踪剂Be-7的观测

林伟立, 朱彤, 唐孝炎   

  1. 北京大学环境学院,环境模拟与污染控制国家重点实验室,北京,100871
  • 收稿日期:2003-02-28 出版日期:2003-07-20 发布日期:2003-07-20

Observation of Atmospheric Tracer Be-7 in the Mt. Qomolangma Region

LIN Weili, ZHU Tong, TANG Xiaoyan   

  1. State Key Joint Lab of Environmental Simulation and Pollution Control, College of Environmental Sciences, Peking University, Beijing, 100871
  • Received:2003-02-28 Online:2003-07-20 Published:2003-07-20

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

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

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