Holocene Environmental and Climatic Changes from the Information of Peat Bog Sediment in Northeastern China

As geological information records, peat bogs are playing more and more important role in the global environmental change study. Northeastern China is located in one of the sensitizing ranges on the earth, so peat bog study of this area is more remarkable. Most of the research results of peat bogs in Northeastern China have been analyzed here. Evolution of peat forming and the climatic changes in Holocene were both educed, that is: ① there were three peak periods during the peat sedimentation, one started from the Mid-Holocene and the other from the initial stages of Late Holocene; ② this area has experienced seven main climatic transition stages since 10,000 a B.P.: from wet-cold, suitable warm, cool-wet, warm on the dry side, cold-dry, cold on the wet side to warming.