Four periods with predominated droughts are identified in 4―2 ka BP according to documentary data, namely 3.6―3.5, 3.1―3.0, 2.8―2.7, and 2.45―2.35 ka BP. Palaeo-environmental data indicated that droughts were pre...Four periods with predominated droughts are identified in 4―2 ka BP according to documentary data, namely 3.6―3.5, 3.1―3.0, 2.8―2.7, and 2.45―2.35 ka BP. Palaeo-environmental data indicated that droughts were predominated in 4―2 ka BP in the south of Northeast China, Inner-Mongolia, east of Qinghai-Tibetan Plateau, and South China. Modeling study shows that precession may be responsible for the occurrence of droughts in 4―2 ka BP, integrating the GCM with forcing of insolation.展开更多
基金Sponsored by the National Natural Science Foundation of China (Grant No. 40331010)
文摘Four periods with predominated droughts are identified in 4―2 ka BP according to documentary data, namely 3.6―3.5, 3.1―3.0, 2.8―2.7, and 2.45―2.35 ka BP. Palaeo-environmental data indicated that droughts were predominated in 4―2 ka BP in the south of Northeast China, Inner-Mongolia, east of Qinghai-Tibetan Plateau, and South China. Modeling study shows that precession may be responsible for the occurrence of droughts in 4―2 ka BP, integrating the GCM with forcing of insolation.