Collaborative Research: Constraints on the last Ross Ice Sheet from Glacial Deposits in the Southern Transantarctic Mountains
Collaborative Research: Constraints on the last Ross Ice Sheet from Glacial Deposits in the Southern Transantarctic Mountains
批准号:
0838615
负责人:
Brenda Hall
金额:
$27.31万
依托单位:
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
项目状态:
已结题
起止时间:
2009-08-15 至 2013-08-31
中文摘要
Stone/0838818该奖项是根据2009年美国复苏和再投资法案(公法111-5)资助的。该奖项支持一个项目,研究沙克尔顿和比尔德莫尔冰川的前厚度和退缩历史,这些冰川流经跨南极山脉(TAM)进入罗斯海南部。沿着这些主要出口冰川下游的侧碛沉积物沿着将被绘制成地图和日期,其结果将有助于确定末次冰期的日期,并限制冰离开跨南极山脉流入罗斯海的厚度。该项目的智力价值在于,研究结果将使科学家能够区分冰退缩的模型,这些模型对以前的冰结构和动态具有重要意义,并限制罗斯海冰川消退对全新世晚期全球海平面的贡献。此外,这将大大有助于更好地了解冰后期海平面变化的幅度和时间以及南极洲对未来海平面上升的潜在影响。该项目的更广泛的影响是,这项工作将有助于量化自LGM以来接地冰体积的变化,提高对冰动力学的理解,并研究其对未来海平面变化的影响。该项目将通过两名研究生和本科生的参与来培养未来的科学家,他们将开发独立的研究项目。与以前的南极项目一样,将通过课堂访问,基于网络的探险期刊,来自实地的信件以及与教师的讨论与K-12学生进行互动,并将使该项目与广大观众分享。这个奖项在南极洲有实地工作。
英文摘要
Stone/0838818 This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). This award supports a project to study the former thickness and retreat history of Shackleton and Beardmore Glaciers which flow through the Transantarctic Mountains (TAMs) into the southern Ross Sea. Lateral moraine deposits along the lower reaches of these major outlet glaciers will be mapped and dated and the results will help to date the LGM and constrain the thickness of ice where it left the Transantarctic Mountains and flowed into the Ross Sea. The intellectual merit of the project is that the results will allow scientists to distinguish between models of ice retreat, which have important implications for former ice configuration and dynamics, and to constrain the contribution from Ross Sea deglaciation to global sea level through the late Holocene. In addition, this will make a significant contribution to a better understanding of the magnitude and timing of postglacial sea-level change and the potential contribution of Antarctica to sea-level rise in future. The broader impacts of the project are that the work will help quantify changes in grounded ice volume since the LGM, improve understanding of the ice dynamics responsible, and examine their implications for future sea level change. The project will train future scientists through participation of two graduate students and undergraduates who will develop self-contained research projects. As in previous Antarctic projects, there will be interaction with K-12 students through classroom visits, web-based expedition journals, letters from the field, and discussions with teachers and will allow the project to be shared with a wide audience. This award has field work in Antarctica.
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