(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。大型内陆湖泊为此类研究提供了极好的来源，因为它们敏感地记录了通常由大气动力学变化控制的流入的重大变化。初步数据有力地表明，全球气候变化现象是造成大盐湖约21至10 ka期间湖泊水位波动的原因。我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内也对全球尺度的气候变化做出了反应。我们建议通过对Great Sale湖沉积物岩心的研究，并将新结果与该盆地以前的工作相结合，对Bonneville盆地最近40ka的湖泊水位变化进行完整而准确的重建。这项工作将验证Bonneville盆地晚更新世湖泊沉积物提供与全球气候变化相关的大气动力学区域响应记录的假设。这项工作还将为未来研究更古老的、不太为人所知的博纳维尔盆地湖泊旋回的古环境重建提供基础。该项目是由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）和美国地质勘探局人员（包括Bob Thompson -花粉、Blair Jones -粘土矿物学、Rick Forrester -介形虫）多学科、多机构合作完成的。

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).