摘要
研究分析了2011年10月至2012年5月期间深圳市大气气溶胶中7Be的含量变化及影响因素。深圳市7Be的含量范围为0～7．6mBq／m3，平均值为3．1mBq／m3，气象条件中降雨对大气7Be的影响最大，而温度以及大气颗粒物PM2．5与7Be的相关性不明显。在春季月份期间，大气7Be比活度与近地面O3的含量变化吻合良好，提示7Be可用于示踪平流层臭氧向地表的动力输送。
In this study, aerosol samples in Shenzhen were collected and analyzed for beryllium-7, over a period of eight month （October＇ 11-May＇ 12）. The concentrations of 7Be in the atmosphere of Shenzhen were in the range of 0-7.6 mBq/m3, with a mean value of 3.1 mBq/m3. Precipitation is the main factor affecting airborne 7Be concentration, and no significant correlation was found between 7Be specific activity with air temperature as well as the concentration of particle matter （PM2.5）. During the spring months, airborne 7Be specific activity correlated fairly well with surface ozone, indicating its implication for tracing downward transport of ozone from the upper troposphere or lower stratosphere.
出处
《地球化学》
CAS
CSCD
2014年第1期32-38,共7页
Geochimica
基金
国家自然科学基金(41102217
11275130)
深圳市科技研发资金项目(JC201005280560A)
关键词
7Be
大气
示踪
深圳
Beryllium-7
atmosphere
tracer
Shenzhen
