SGER: Midwest Lake Coring Swath for Holocene Varves

这项建议寻求资金支持1999年夏季SGER探险队从9-12个不同湖泊的狭长地带收集长(10+m)Kullenberg活塞芯，有效地利用了几个集中的科学需求、技术发展和后勤机会。支持者已经确定了密歇根州约30个深度超过25米的湖泊，这些湖泊具有很高的非冰川钙质全新世火山口层序的潜力。主要的科学目标是收集一套核心来测试太阳节律和突然气候事件的假说。如果是外部强迫，这些在大陆范围内的类似时间窗口应该是一致的，这是最近完成的一篇关于明尼苏达州遗址的论文提出的一个挥之不去的挑战。这一试点项目还承诺取得其他重大成就，旨在促进地球系统历史界的发展：1)完成高流动性和高性价比的系统开发，用于在超过25米深的湖泊中收集长达14米的活塞芯。然后，该系统将可供其他研究团队使用，2)在LRC培训一个由4人组成的年轻取心操作团队，他们可以为这个社区提供持续的专业知识，以及3)根据新的协议和管理标准收集和描述有价值的岩心，这将促进研究并为其他研究项目提供样本。

AbstractThis proposal seeks funds to support a summer 1999 SGER expedition to collect long (l0+m) Kullenberg piston cores from a swath of 9-12 varved lake sites that takes efficient advantage of several convergent scientific needs, technical developments, and logistical opportunities. The proponents have identified some 30 lakes deeper than 25m across Michigan with high potential for non-glacial calcareous Holocene varve sequences. The main scientific goal is collect a suite of cores to test hypotheses of solar rhythms and abrupt climatic events. If externally forced, these should be coherent in similar time-windows on a continental scale, a lingering challenge from a recently-completed thesis for sites in Minnesota. This pilot project also promises other significant achievements intended to promote the Earth System History community: 1) to complete development of a highly-mobile and cost-effective system for collecting piston cores up to 14m long in lakes greater than 25m deep. This system will then become available to other investigator teams, 2) to train a young coring operations team of 4 persons at LRC who can provide continuing expertise to this community, and 3) to collect and describe valuable cores according to new standards of protocol and curation that will catalyze research and provide samples to other investigator projects.