COLLABORATIVE RESEARCH: Response of the Northwest Greenland Cryosphere to Holocene Climate Change

合作研究：格陵兰西北部冰冻圈对全新世气候变化的响应

• 批准号: 1107411
• 负责人: Erich Osterberg
• 金额: $ 46.76万
• 依托单位: Dartmouth College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1107411&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Response; Northwest; Greenland

The aim of this collaborative project between investigators at three universities is to develop records of past climate in northwest (NW) Greenland and synthesize them with records of the position of ice margin to evaluate the response of the Greenland Ice Sheet to past warm periods, such as the Holocene Climatic Optimum (approximately 5 to 9 thousand years ago). Recent studies suggest that rapid ice loss is expanding northwards into NW Greenland, as demonstrated by the dramatic August, 2010 calving event from Petermann Glacier. However, little paleoclimate and ice sheet research has been conducted in NW Greenland, despite the proximity to a logistics center at Thule Air Base. The proposed research integrates multiple climate proxies and glaciological modeling experiments in the Thule region with the following research objectives:1) Reconstruct Holocene climate in NW Greenland via inferences from reconstructed local ice cap extents (North Ice Cap, Tuto Ice Cap), ice core stable isotope and precipitation records, and data from nearby lake sediments. 2) Examine the sensitivity of the NW Greenland Ice Sheet (GIS) to Holocene climate changes by developing the history of the areal extent of the GIS and synthesizing proxy data with glaciological modeling experiments to examine past GIS changes and predict future GIS retreat.Results from the proposed research will enable a more accurate prediction of the NW Greenland cryospheric response to a future warmer world and provide information directly relevant to predictions of future sea-­level rise. The investigators propose to enhance public outreach and K-­12 science education through development of educational modules using simplified, web-­based, climate and glaciological models. They would involve graduate and undergraduate students in field and lab research, participate in the Dartmouth Women­ In Science Project, and partner with the Dartmouth polar IGERT program.

三所大学研究人员之间的合作项目的目的是开发西北（NW）格陵兰岛过去气候的记录，并与它们合成冰缘地位的记录，以评估格陵兰冰块对过去温暖时期的反应，例如全新世气候最佳的最佳选择（大约5至9千年）。最近的研究表明，正如Petermann Glacier 2010年8月的戏剧性产犊事件所证明的那样，快速冰流向西北格陵兰岛。然而，尽管在图勒空军基地的物流中心附近，但在格陵兰西北几乎没有进行古气候和冰盖研究。拟议的研究通过以下研究目标整合了多个气候代表和冰科建模实验：1）通过从重建的局部冰盖扩散物（North Ice Cap，Tuto Ice Cap，Tuto Ice Cap），Ice Core Stable Stable Stable Stable Pose Recess和Suckitation Records和附近的数据来重建了GROGENAND的全新世气候。 2) Examine the sensitivity of the NW Greenland Ice Sheet (GIS) to Holocene climate changes by developing the history of the areal extent of the GIS and synthesizing proxy data with glaciological modeling experiments to examine past GIS changes and predict future GIS retreat.Results from the proposed research will enable a More accurate prediction of the NW Greenland cryosphere response to a future warmer world and provide information directly relevant to predictions of future海平面上升。研究人员建议通过使用简化的，基于网络的气候和冰川学模型来开发教育模块来增强公共外展和K-12科学教育。他们将涉及研究生和本科生参与实验室和实验室研究，参加达特茅斯女性科学项目，并与达特茅斯极地Igert计划合作。