中世纪暖期的中国东部沙地

Sandy Lands During the Medieval Warm Period in Eastern China

中世纪暖期是冰后期的又一次温暖期 ,研究表明 ,当时世界许多地区均出现不同程度的气温回升现象 ,而且气温回升与 2 0世纪初气候变暖现象类似。为探讨该期中国东部沙地的气候环境状况 ,利用已有的研究成果 ,对中国东部沙地若干古土壤和河湖相沉积进行分析。结果表明 ,中世纪暖期 ,东部沙地普遍发育古土壤或河湖相沉积 ,气候温暖湿润 ,流沙固定 ,沙地面积缩小 ,植被盖度增加 ,沙地形成干草原—疏林草原景观。弄清中世纪暖期东部沙地气候状况 ,可为其未来气候环境演变趋势研究提供基础参考。

The Medieval Warm Period(MWP)is another warm period after postglacial epoch.A large quantity of research results have manifested that the temperature increased unevenly during the middle ages in many areas in the world then. This phenomenon is similar to the global warming at the beginning of the 20th century. It is very singificant for global warming research at the 20th century to study on climatic and environmental change during the Medieval Warm Period. In this article, some typical Holocene sections, found in sandy lands in eastern China, were collected and indicated that paleosol and lacustrine sediment developed, drifting sands were fixed during the Medieval Warm Period. Paleosol and pollen were analyzed to certify that the fluctuation of temperature was weak and the precipitation was relative abundant, the landscape of sandy land is steppe or forest steppe.