Collaborative Research: Sensitivity of local glaciers in central East Greenland to Holocene climate change

合作研究：格陵兰东部中部当地冰川对全新世气候变化的敏感性

• 批准号: 0909270
• 负责人: Meredith Kelly
• 金额: $ 26.16万
• 依托单位: Dartmouth College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-01 至 2013-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0909270&HistoricalAwards=false
• 关键词: Collaborative; Research; Sensitivity; local; glaciers

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).This award will support an investigation of Holocene glacier fluctuations in the Scoresby Sund region of central East Greenland (~70-72°N, 22-28°W) along a transect from a coastal maritime setting to the continental conditions adjacent to the Greenland Ice Sheet. The 'Intellectual Merit' of the proposed study lies in the potential to affirm, or otherwise, the widely-held view that the scale of glacier and ice sheet change being observed today in Greenland is not unique in the Holocene. The current recession of glaciers in the Scoresby Sund region is exposing sub-fossil vegetation that grew at times when glaciers were smaller than at present. These emerging records yield a rare opportunity to examine both the biota of these warm times and, more critically, the response of the glaciers to temperatures as high as, or higher than, at present. Development of a chronology for a network of sites in the Scoresby Sund region, including a site adjacent to the Renland ice core, across an environmental gradient can provide insights into recent patterns of ice sheet distribution. However, to place these in context requires a longer temporal framework. Thus, two additional objectives emerge. First, compare late-Holocene glacier fluctuations in Greenland with glacier fluctuations in other mid-to-high Northern Hemisphere locations. This will assess whether glaciers in Greenland are more or less sensitive than their counterparts in other high-latitude locations. Second, document a continuous pattern of glacier fluctuations in Greenland during Holocene time. When contrasted with paleoclimate indicators, such as the GRIP borehole paleotemperature record, how Scoresby Sund glaciers responded to warmer-than-present times, such as the so-called Holocene Climatic Optimum (~5000-9000 years ago), can be assessed. The proposed study has numerous 'Broader Impacts'. It will contribute to the educational development of graduate and undergraduate students at Dartmouth College, the University of Maine, and the University of Cincinnati, and tie in with the IGERT program at Dartmouth College. The PIs will also visit elementary schools and present public lectures on climate change. The results of the study will be added to an interactive, Web-based learning system and stand-alone kiosk deployed at Acadia National Park.

该奖项是根据2009年的《美国回收与重新投资法》（公法111-5）资助的。该奖项将支持全新世冰川波动的投资，该奖项在东格陵兰中部的Scoresby星期日地区（〜70-72°N，22-28°W）沿着从沿海海洋条件的临界环境到Greenland Iceply the Greenland Icepth to Greenland Iceplos to Greenland Icepth to Greenland Iceplo。拟议的研究的“智力优点”在于有可能肯定或以其他方式肯定的是，在格陵兰岛观察到的冰川和冰纸变化的规模在全新世并不独特。当前在Scoresby Sunday地区冰川的衰退正在暴露于冰川小于目前时有时生长的亚化石植被。这些新兴记录产生了难得的机会来检查这些温暖时期的生物群，更重要的是，冰川对温度的反应高达或高于目前。开发了分数SUND区域网络网络的年表，包括与Renland Ice Core相邻的地点，可以在环境梯度跨越环境梯度上进行洞察力，可以洞悉最近的冰盖分布模式。但是，将它们放在上下文中需要更长的临时框架。这是出现了两个其他目标。首先，将格陵兰岛的晚期冰川波动与其他北半球中部的冰川波动进行比较。这将评估格陵兰岛的冰川是否比其他高纬度地区的冰川更敏感。其次，记录了全新世期间格陵兰岛冰川波动的连续模式。当与古气候指示器（例如握把井孔古温度记录）形成鲜明对比时，可以评估分数冰川的冰川冰川对较温暖的时间的反应，例如所谓的全新世气候最佳（〜5000-9000年前）。拟议的研究具有许多“更广泛的影响”。它将为达特茅斯学院，缅因大学和辛辛那提大学的毕业生和本科生的教育发展做出贡献，并与达特茅斯学院的IGERT计划联系。 PI还将访问小学，并就气候变化发表公开讲座。该研究的结果将添加到基于网络的学习系统和在阿卡迪亚国家公园部署的独立信息亭。