The lossonignition(LOI)at 600℃ of 197 samples obtained from a 820 cm profile at Dongganchi of Fangshan in Beijing.Accorrding to the continuos records of LOI,with the pollen analysis,the profile lithology,and 14C radiocarbon dating,the respondence of LOI range to past climate and environment since 15000 aB.P in Beijing was discussed.In the meantime,to understand the characteristics of LOI range of six zones in Dongganchi profile,the indications of LOI range to abrupt climate event and sediment landfor...