(ESH) Collaborative Research: Pliocene and Early PleistoceneContinental Paleoclimate Records from the Eastern Great Basin, Utah -- UC Davis Component

上新世中期至更新世早期是全球气候变化的主要时期。在这一时期，美国大陆很少有关于非海洋气候变化的长而连续的记录被报道，而那些存在的记录来自大盆地的遥远西部，在那里，海洋气候过程预计会对记录产生重大影响。主要研究人员从大盆地东部最近钻探的两个湖泊沉积物岩心中获得了新的数据。初步数据表明，这些岩心代表了重要的古气候地质记录（从0.75 Ma到约3.1 Ma），这将为确定海洋和大陆气候过程之间的关系和耦合程度提供急需的数据。本研究的目的是获取这两个岩心的环境磁学、岩石地层学和沉积学资料，以破译大盆地这部分地区的古气候变化历史。对上新世和更新世气候事件的时间、时间变化和规模的详细记录将为研究大陆气候变化提供重要的基础数据。建议将这些数据与大盆地的其他不太详细的记录以及海洋古气候记录进行比较。这将有助于限制陆地-海洋相互作用模型和全球环境变化模型。该项目是多学科和多机构的，将与美国地质调查局和犹他大学的同事密切合作进行。

9510083 Roberts The middle Pliocene to early Pleistocene was a period of major global climate change. Few long and continuous of records of non-marine climate changes have been reported from this period in the continental United States, and those that exist are from the far west of the Great Basin where marine climate processes would be expected to significantly affect the records. New data have been obtained by the Principal Investigators from two recently drilled lacustrine sediment cores in the eastern Great Basin. Preliminary data suggest that these cores represent important geological records of paleoclimate (from 0.75 Ma to about 3.1 Ma) which will provide much-needed data to determine the relationship, and degree of coupling, between marine and continental climate processes. The goals of this study are to acquire environmental magnetic, lithostratigraphic, and sedimentologic data from these two cores in order to decipher the history of paleoclimate variations in this part of the Great Basin. Detailed documentation of the timing, temporal variation, and magnitude of Pliocene and Pleistocene climatic events will provide fundamentally important data concerning continental climate change. It is proposed to compare the data with other, less detailed, records from the Great Basin as well as marine paleoclimate records. This will help to constrain models of land-ocean interaction and models of global environmental change. The project is multidisciplinary and multi-institutional and will be carried out in close collaboration with colleagues from the U.S. Geological Survey and the University of Utah.