北极巴罗地区过去2000年气候与环境变化研究

It has been breached on research of climatic and environmental change of the last 2000 years in Barrow, Arctic. It was estimated at applying the project that the age at bottom of the lake core 98-4-B is 2600 years, the age at bottom of the lake core 98-7-A is 2200 years. However, it is determinated by ageing 15 AMS 14C samples by the Institute of Heavy Ion Physics of Peking University that the age at bottom of the lake core 98-4-B is 40000 years, the age at bottom of the lake core 98-7-A is 34000 years. It is perfectly recorded in these 2 lake cores that the transfer from stage 3 to Last Glacial Maximum and from Last Glacial Maximum to Holocene. The record of pollen in lake core 98-4-A show that there are an abundance of species in Arctic ecosystem, the ecosystem was havocked at Last Glacial Maximum, and is resuming gradually in Holocene. By this time, Arctic ecosystem do not reach the level before Last Glacial Maximum. According as this, earth warming must not end now.

对98年夏在北极巴罗钻取的2支高分辩率湖泊岩芯（长度分别为3.12米、2.69米）进行系统牧６取⒒肪车厍蚧А⑽⑻迳锓治觥㈡叻鄯治龊筒饽辏运檬葑鱿低车亩嘣治龊涂占浞治觯钊胙芯恐匾粱肪骋蜃佑肫虻墓叵的Ｐ停恢亟ū奔吐薜厍?000年高直媛实钠蛴牖肪臣锹迹谎芯勘奔吐薜厍?000年气候与环境变化特征。.