Collaborative Research: Reconstructing the Past 20,000 Years of Glacial and Sea Level History for Severnaya Zemlya Russia, 80 N.

合作研究：重建俄罗斯北地岛过去 2 万年的冰川和海平面历史，北地 80 号。

• 批准号: 0001885
• 负责人: Steven Forman
• 金额: $ 19.04万
• 依托单位: University of Illinois at Chicago
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-04-01 至 2006-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0001885&HistoricalAwards=false
• 关键词: Collaborative; Research; Reconstructing; Past; 20

Abstract OPP-99-11982LubinskiOhio State UniversityFormanUniversity of Illinois at ChicagoOPP-00-01885This is a collaborative project by Principal Investigators from Ohio State University and University of Illinois at Chicago to clarify the heavily debated northern extent of the Kara Sea Ice Sheet during the Last Glacial Maximum (LGM) around 20 thousand years ago. Uncertainty in the configuration of this major ice sheet and the adjoining Barents Sea Ice Sheet has made it difficult to create reliable boundary conditions for global climate model simulations. A successful solution to this problem must involve focussed geomorphic, stratigraphic, and geochronologic studies of Severnaya Zemlya.The Principal Investigators will evaluate the limits and timing of glacial and deglacial events and associated changes in relative sea level on Severnaya Zemlya since the LGM. A collaborative American-Russian-Swedish field program will focus on two key areas where earlier researchers found rich deposits of glacial, marine, and terrestrial deposits associated with the last glacial/interglacial cycle. The researchers will: 1) determine the magnitude and timing of the LGM glacial-isostatic response; 2) define the age and timing of LGM glaciation and deglaciation; and 3) assess the flow direction of the LGM. They will determine if the LGM was a 10-20 km-scale expansion of existing ice caps, at least one km-thick ice sheet, or an intermediate complex.The Principal Investigators will collaborate with the glaciological and Earth-rheological modeling communities to improve their understanding of climatic, sea-level and intrinsic glaciologic controls on LGM glaciation in the High Arctic. To help reconstruct ice-sheet thickness and thinning rates, they will also provide their glacioisostatic data to the Earth-rheological modeling community.

摘要 OPP-99-11982Lubinski俄亥俄州立大学福尔曼伊利诺伊大学芝加哥分校OPP-00-01885这是俄亥俄州立大学和伊利诺伊大学芝加哥分校主要研究人员的一个合作项目，旨在澄清末次冰期期间备受争议的喀拉海冰盖北部范围最大值（LGM）大约在2万年前。 这个主要冰盖和毗邻的巴伦支海冰盖的构造的不确定性使得很难为全球气候模型模拟创建可靠的边界条件。 成功解决这一问题必须涉及北地岛的集中地貌、地层学和地质年代学研究。首席研究员将评估末次盛冰期以来北地岛冰川和冰消事件的限制和时间以及相关的相对海平面变化。 美国-俄罗斯-瑞典合作的实地项目将重点关注两个关键领域，早期研究人员在这两个领域发现了与上一次冰期/间冰期周期相关的丰富的冰川、海洋和陆地沉积物。 研究人员将：1）确定末次盛冰期冰川均衡响应的幅度和时间； 2) 确定末次冰期冰期和消冰期的年龄和时间； 3) 评估LGM 的流动方向。 他们将确定末次盛冰期是否是现有冰盖10-20公里规模的扩张、至少一公里厚的冰盖，还是一个中间复合体。首席研究员将与冰川学和地球流变学建模界合作，以改进他们对气候、海平面和冰川对高北极末次冰川作用的内在控制的理解。 为了帮助重建冰盖厚度和减薄率，他们还将向地球流变建模界提供冰川均衡数据。