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

9631562 Kelts 全球气候变化研究的一个重要方面是对大陆内部气候变化的研究，它落后于海洋环境的研究。 为了了解大气动态变化对气候系统的影响，显然有必要进行这种研究。 大型内陆湖泊为此类研究提供了一个极好的来源，因为它们敏感地记录了流入量的显著变化，而这些变化通常受大气动力学变化的控制。 初步数据强烈表明，全球气候变化现象是负责在大盐湖的湖泊水位波动在约21和10 ka之间的时期。 尽管有人认为大盐湖在此期间也对全球范围的气候变化做出了反应，但对全新世历史的了解却很少。 我们建议通过研究大销售湖的沉积物岩心，并将新的结果与以前的工作在盆地中，产生一个完整的和过时的重建湖平面的变化为过去的40万年在Bonneville盆地。 这项工作将测试的假设，晚更新世湖泊沉积物在Bonneville盆地提供了一个区域的响应记录与全球气候变化相关的大气动力学。 这项工作也将提供古环境重建的基础上，在未来的研究较老的，不太知名的，Bonneville盆地湖泊周期。 该项目代表了Jack Oviatt（堪萨斯州立大学-物理地层学）、Andrew Roberts（明尼苏达大学-稳定同位素地层学）和U.S.G.S.人员（包括鲍勃汤普森-花粉;布莱尔琼斯-粘土矿物学; Rick Forrester-介形虫）。

9631562 Kelts 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).