Collaborative Research: Lake Baikal Drilling Project: High Resolution Studies of Paleoclimate Change in South-Central Siberia During the Plio-Pleistocene

9614426.该项目将完成首席调查员对贝加尔湖上更新世沉积物中记录的高分辨率古气候变化信号的科学调查。贝加尔湖钻井项目(BDP)是一个多国(俄罗斯、日本、德国、美国)努力提取贝加尔湖沉积盆地全球气候变化和构造演化记录的项目。从历史上看，BDP始于1989年，是一家俄美合资的科学企业。1993年1月，BDP小组与俄罗斯雅罗斯拉夫尔的Nedra钻井企业合作，成功地从冻结在湖上的驳船上部署了一个轻型钻井平台。利用该系统，第一个长(100米)的液压活塞岩芯成功地从354米水深的两个孔中打捞出来，提供了跨越过去60万年的气候数据。1996年1月至3月，Nedra对BDP钻井系统进行了技术改进，使钻井能够深入海底250米，提供了长达450万年前的气候变化数据。计划中的钻探将检查西伯利亚能量平衡对北半球冰川(3-2.8 Ma)的开始和加剧以及青藏高原隆起的响应。需要检验的一个重要假设是，西伯利亚的长期气候演变在多大程度上影响了中亚苔原和湿地的分布，从而影响了全球甲烷平衡。***

9614426 King This project will involve the completion of the Principal Investigator's scientific investigation of high resolution signals of paleoclimate change recorded in Plio-Pleistocene sediments of Lake Baikal. The Baikal Drilling Project (BDP) is a multinational effort (Russia, Japan, Germany, USA) to extract the record of global climate change and tectonic evolution of the Lake Baikal sedimentary basin. Historically, the BDP began in 1989 as a joint Russian-American scientific venture. In January 1993, the BDP team, in cooperation with the NEDRA Drilling Enterprise of Yaroslavl, Russia, successfully deployed a light-weight drilling rig from a barge frozen into position on the Lake. With this system, the first long (100m) hydraulic piston cores were successfully recovered from two holes in 354m water depth providing climate data spanning the last 600,000 years. In January-March 1996 technological improvements of the BDP drilling system made by NEDRA enabled drilling to a subbottom depth of 250m, providing data on climate change up to 4.5 million years ago. Planned drilling will examine the response of Siberia's energy balance to the initiation and intensification of northern hemisphere glaciation (3 - 2.8 Ma) and the uplift of the Tibetan Plateau. One of the important hypotheses to be tested is the extent to which the long- term climatic evolution of Siberia has influenced the distribution of tundra and wetlands in central Asia and thus affected the global methane balance. ***