(ESH) Collaborative Research: Relationship Between Global Climate Change and Lake Bonneville Fluctuations: Analysis of Sediment Cores from the Great Salt Lake, Utah

9631363罗伯茨全球气候变化研究的一个重要方面，即落后于海洋环境的研究，是对大陆内陆气候变化的研究。为了了解大气动力学变化对气候系统的影响，这种研究显然是必要的。大型内陆湖泊为这类研究提供了极好的来源，因为它们敏感地记录了流入的重大变化，而流入通常受大气动力学变化的控制。初步数据有力地表明，全球气候变化现象是大盐湖约21至10ka期间湖泊水位波动的原因。人们对全新世的历史知之甚少，尽管有一些迹象表明，大盐湖在这段时间也对全球范围的气候变化做出了反应。我们建议通过对大赛尔湖沉积岩心的研究，并将新的结果与盆地以前的工作相结合，来完整地、准确地重建博纳维尔盆地最近40 ka的湖面变化。这项工作将检验这样一种假设，即波内维尔盆地的晚更新世湖泊沉积物提供了与全球气候变化相关的大气动力学的区域响应记录。这项工作还将为今后研究较古老的、不太为人所知的波纳维尔盆地湖泊旋回的古环境重建提供基础。该项目代表了杰克·奥维亚特(堪萨斯州立大学物理地层学)、安德鲁·罗伯茨(明尼苏达大学稳定同位素地层学)和美国地质调查局人员(包括鲍勃·汤普森-花粉；布莱尔·琼斯-粘土矿物学；里克·福雷斯特-介形虫)之间的多学科、多机构合作。?？

9631363 Roberts An important aspect of global climate change studies, that is lagging behind studies of marine environments, is the study of climate change in continental interiors. Such studies are clearly necessary in order to understand the effects of changes in atmospheric dynamics on the climate system. Large inland lakes provide an excellent source for such studies because they sensitively record significant changes in inflow which are usually controlled by changes in atmospheric dynamics. Preliminary data strongly suggest that global climate change phenomena are responsible for lake-level fluctuations in the Great Salt Lake in the period between about 21 and 10 ka. Less is known about the Holocene history, although there are some suggestions that the Great Salt Lake also responded to global-scale climate changes during this interval. We propose to produce a complete and well-dated reconstruction of lake-level changes for the last 40 ka in the Bonneville basin through study of sediment cores from Great Sale Lake and by integrating the new results with previous work in the basin. This work will test the hypothesis that late Pleistocene lake sediments in the Bonneville basin provide a regional response record of atmospheric dynamics associated with global climate change. This work will also provide the basis for paleoenvironmental reconstructions in future studies of older, less well-known, Bonneville basin lake cycles. This project represents a multi-disciplinary, multi-institutional collaboration between Jack Oviatt (Kansas State University - Physical stratigraphy), Andrew Roberts (University of Minnesota - Stable isotope stratigraphy, and U.S.G.S. personnel (including Bob Thompson - pollen; Blair Jones - clay mineralogy; Rick Forrester - ostracodes). ??