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Long-term variations of major atmospheric compositions observed at the background stations in three key areas of China

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Advances in Climate Change Research 2020年第4期11卷 370-380页

作者： ZHANG Yong JIN Jun-Li YAN Peng TANG Jie FANG Shuang-Xi LIN Wei-Li LOU Meng-Yun LIANG Miao ZHOU Qing JING Jun-Shan LI Ya-Nan JIA Xiao-Fang LYU Shan-Shan Meteorological Observation Center China Meteorological AdministrationBeijing100081China Zhejiang University of Technology Hangzhou310014China Minzu University of China Beijing100081China

atmospheric compositions and acid rain are closely related to atmospheric environment,weather,and climate *** this study,the concentration levels and long-term trends of CO_(2),CH_(4),O_(3),PM_(2.5),PM_(10),and acid rain were presented at the *** global baseline station in Qinghai,Shangdianzi and Lin'an regional background stations in the North China Plain(NCP)and the Yangtze River Delta region(YRD)of China based on the data observed until *** increasing trends of CO_(2) were found at all of these *** ***,the concentration levels and growth rate were consistent with the average values in the Northern Hemisphere(NH)and those observed at the Mauna Loa station in *** CH_(4) also showed a upward tendency similar to that observed in *** with the observations at *** global baseline station,the CO_(2) and CH_(4) mole fractions were higher at Shangdianzi and Lin'an regional background stations,indicating the important contributions of anthropogenic activities to the regional background level of CO_(2) and CH_(4).The annual averaged surface ozone showed increasing trends at *** and Shangdianzi stations,whereas no clear trend was found at Lin'an *** variations in the patterns of aerosol concentrations at Shangdianzi and Lin'an were found according to the PM_(2.5) or PM_(10) ***,the aerosol concentrations at both stations shown declining trends since the ***,two periods of high particle concentrations occurred in 2006-2007 and *** annual mean aerosol concentrations have continuously decreased after 2013-2014,indicating the effectiveness of pollution control in the NCP and YRD,especially since the implementation of the‘Action Plan for Prevention and Control of Air Pollution’in September *** analysis of aerosol with acid rain showed that the period with high concentrations of aerosols in the early years was consistent with that of severe

关键词： atmospheric compositions Background observations Long-term variation Trend Coordinated control of PM and ozone China

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