【摘要】 湖光岩玛珥湖沉积物总有机碳、总氮、总氢、生物硅等有机地球化学指标以及AMS14 C年代明确地指示了新仙女木事件在中国南方地区的存在 ,它不仅表现为降水的显著减少 ,而且表现为气温的降低 ,显示了凉干的气候环境 ,反映了季风系统在很短的时间内进行了大规模重组 ,夏季风强度显著减弱的事实 ,这为西北太平洋低纬度区存在YD事件提供了新的来自于陆地的证据。更多还原

【Abstract】 Maar Lake recorded paleoclimate changes like a natural gauge The morphological features of Maar Lake ensue to homogeneity of detritus input and high resolution record of paleoenvironmental variations The research of Maar Lake will play an important role for reconstructing paleoclimate history Maar Lake Huguangyan is located in Leizhou Peninsula, the southern China, near Pacific Ocean in the east and South China Sea in the south, where which is intersect site of eastern southeast monsoon and southwest monsoon and sensitive to climate change The sediments from Maar Lake Huguangyan have been recovered The concentrations of biogenic silica, total organic carbon, total nitrogen and total hydrogen inferred from the sediments of Maar Lake Huguangyan provide a climate record of the last deglaciation with century resolution The records fully demonstrate the Younger Dryas event is well documented in the southern China, which occurred synchronously with that recorded in Greenland, and point to the cool and dry climatic conditions during this period, because of the remarkable decrease of precipitation and temperature These results suggest the rapid reorganization of atmospheric circulation in monsoon climate system in short time, and reflect that the intensity of the summer monsoon was reduced during the Younger Dryas period更多还原