7Be and 210Pb radioactivity and implications on sources of surface ozone at Mt. Waliguan
Beryllium-7 (7Be) and lead-210 (210Pb) radioac- tivity in aerosols collected, from October 2002 to January 2004 at Mt. Waliguan, by the Global Atmospheric Watch (GAW) Station, Qinghai Province is presented. The data were analyzed together with simultaneously measured surface ozone concentrations. We found that short time variations of 7Be and 210Pb were linked to alternations of synoptic weather around the Mt. Waliguan region. 210Pb showed the lowest concentration in summer while 7Be showed no obvious sea- sonal changes. Relatively high 7Be and 210Pb radioactivity was observed at Mt. Waliguan when compared with the ob- servations at other mountain sites in other parts of the world. Surface ozone and 7Be showed a consistent seasonal variation. Surface ozone correlated fairly well with 7Be/210Pb ratio. This suggested that vertical transport from higher altitudes of the atmosphere has predominant effects on the budget of surface ozone at Mt. Waliguan.
作 者： ZHENG Xiangdong WANG Guojiang TANG Jie Zhang Xiaochun YANG Wei H.N.Lee Wang Changsheng 作者单位： ZHENG Xiangdong,TANG Jie(Chinese Academy of Meteorological Sciences, Beijing 100081, China)WANG Guojiang,YANG Wei,Wang Changsheng(State Key Laboratory of Environmental Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China)
Zhang Xiaochun(Chinese Global Atmospheric Watch, Xining 710089, China)
H.N.Lee(Environmental Measurements Laboratory, U.S. Department of Homeland Security, New York, NY 10014-4811, USA)
刊 名： 科学通报(英文版) SCI 英文刊名： CHINESE SCIENCE BULLETIN 年，卷(期)： 2005 50(2) 分类号： P4 关键词： 7Be 210Pb surface ozone Mt. Waliguan