对2006年4月北京降尘进行了10Be,14C和δ13C等项分析,初步结果显示:降尘10Be浓度与黄土比较接近,降尘中黑炭的δ13C数值与黄土有机质接近;降尘中黑炭的14C年龄大致可划分为两个特征区间,反映了降尘物质有两大源区。本工作在刘东生先生指导下完成,谨以此文祝贺刘先生九十华诞。 The results of 10Be, 14C and δ13C analysis of dustfall in Beijing in April 2006 show that the dust concentration of 10Be is close to that of loess, and the δ13C value of black carbon in dustfall is close to that of loess; the 14C age of black carbon in dustfall is roughly Can be divided into two characteristic intervals, reflecting the dust source has two major source areas. This work was completed under the guidance of Mr. Liu Dongsheng and would like to congratulate Mr. Liu on his 90th birthday.