Surface ozone monitoring and background characteristics at Zhongshan Station over Antarctica  

作　　者：WANG YuTing BIAN LinGen MA YongFeng TANG Jie ZHANG DongQi ZHENG XiangDong 

机构地区：[1]State Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, China [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Chinese Science Bulletin》2011年第10期1011-1019,共9页

基　　金：supported by the National Natural Science Foundation of China(41076132);the MOST Program of China(2006BAB18B05)

摘　　要：Seasonal variation in surface ozone and the relationship between the background ozone concentration and wind were evaluated at Zhongshan Station,Antarctica using 2008 data.The wind frequency from the station area was only 2%,while the prevailing wind frequency was much larger (79.2%).This indicates that the surface ozone observations were not affected by the human activities at the station,and therefore could be counted as background concentrations of surface ozone along Antarctic coast.The concentration of surface ozone shows a distinct annual variation with the yearly mean of 25.0 nmol mol-1 and the maximum in winter,the minimum in summer.The surface ozone concentration had a strong negative correlation with ultraviolet radiation,and the mean values during polar night were one to two times higher than those in summer.These results imply that photochemical destruction of ozone dominates over Antarctica.The ozone depletion events at Zhongshan Station were obviously related to lower temperatures and higher BrO concentrations.Backward trajectory analysis reveals that the ozone depletion events are predominately caused by the high BrO concentrations.Seasonal variation in surface ozone and the relationship between the background ozone concentration and wind were evaluated at Zhongshan Station, Antarctica using 2008 data. The Wind frequency from the station area was only 2%, while the prevailing wind frequency was much larger （79.2%）. This indicates that the surface ozone observations were not affected by the human activities at the station, and therefore could be counted as background concentrations of surface ozone along Antarctic coast. The concentration of surface ozone shows a distinct annual variation with the yearly mean of 25.0 nmol tool-1 and the maximum in winter, the minimum in summer. The surface ozone concentration had a strong negative correlation with ultraviolet radiation, and the mean values during polar night were one to two times higher than those in summer. These results imply that photochemical de- struction of ozone dominates over Antarctica. The ozone depletion events at Zhongshan Station were obviously related to lower temperatures and higher BrO concentrations. Backward trajectory analysis reveals that the ozone depletion events are predominately caused by the high BrO concentrations.

关 键 词：南极中山站 地面臭氧 臭氧监测 臭氧浓度 臭氧耗损 紫外线辐射 季节变化 人类活动 

分 类 号：P412.293[天文地球—大气科学及气象学]