Climatic change over the past 9 ka in the Jiangling area, Jianghan plain：Records of organic carbon isotopes

Abstract： On the basis of the high-density sampling and organic carbon isotope analysis, combined with the grain size and lithologic studies, the paleoclimatic and paleoenvironmental evolution in the Jiangling area of the Jianghan plain during the past 9 ka is reconstructed. There was a relatively warm and wet climatic environment at about 9.0－6.31 ka , which tended to be dry at the late stage；a cold and dry climatic environment occurred at 6.31－4.97 ka , which reached a culmination at 5.78 ka；the climatic environment again became warm and wet at 4.97－2.50 ka , during which limnic peat was developed at 3.44－2.50 ka；marked temperature lowering at 3.36, 3.11, 2.93 and 2.71 ka is recorded；the temperatures have been relatively low since 2.50 ka, representing a cold epoch. The climatic changes in the Jiangling area over the past 9 ka are coincident with the research information from domestic in the neighboring areas but also show regional difference.