Collaborative Research: Long Term Sublimation/Preservation of Two Separate, Buried Glacier Ice Masses, Ong Valley, Southern Transantarctic Mountains

合作研究：跨南极山脉南部翁谷两个独立的埋藏冰川冰块的​​长期升华/保存

• 批准号: 1445168
• 负责人: Gregory Balco
• 金额: $ 5.97万
• 依托单位: Berkeley Geochronology Center
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-11-01 至 2022-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1445168&HistoricalAwards=false
• 关键词: Collaborative; Research; Long; Term; Sublimation; Collaborative; Research; Long; Term; Sublimation

Putkonen/1445205This award supports the study of a large body of ice that is buried beneath approximately a meter of debris in the Ong Valley of the Transantarctic Mountains of East Antarctica. Preliminary analyses of this material suggest that it could be over a million years old. Most glacial ice contains tiny air bubbles that have trapped the atmospheric gases and other atmospherically transported materials existing at the time that the ice was deposited such as plant pollen, microbes and mineral dust. Samples will be collected from this buried ice mass, down to a depth of 10 meters, and cosmogenic nuclide concentrations both in the overlying debris and in the till contained in the ice will be measured. This site could contain some of the oldest ice on Earth and studies of the material contained within it may help researchers to better understand the processes involved in its survival for such long periods of time. This work will also help inform scientists about the processes involved in the development of landforms here on earth as well as those on Mars where similar dirt covered glaciers are found today.Samples of the buried ice will be collected in Ong Valley and analyzed to determine the cosmogenic nuclide concentrations in both the overlying debris and in the mineral matter suspended in the ice. The combined analysis of the target cosmogenic nuclides (Beryllium-10, Aluminum-26, and Neon-21) will allow the age of the ice to be uniquely determined and will enable determination of the rate that the ice is sublimating. The intellectual merit of this research is to unequivocally determine the age of the ice and the sublimation rate of the ice in Ong Valley, Antarctica and to better understand if this an uniquely Antarctic process or whether it could exist elsewhere on earth or on other planets. The work may also lead to the recognition of the oldest buried ice ever found on Earth and would provide a source from which direct information about the atmospheric chemistry, ancient life forms, and geology of that time could be measured. The broader impacts of this work are that it will be relevant to researchers in a number of different fields including glaciology, paleoclimatology, planetary geology, and biology. Several students will also participate in the project, conducting Antarctic field work, making measurements in the lab, attending meetings, participating in outreach activities, and producing videos. A graduate student will also write a thesis on this research. The results will be published in scientific journals and presented at conferences. The project requires field work in Antarctica.

Putkonen/1445205这项奖项支持对大型冰的研究，该冰块被埋在东南极洲跨北极山脉的Ong Valley大约一米的碎屑下。对该材料的初步分析表明，它可能已经超过一百万年了。 大多数冰川冰都包含微小的气泡，这些气泡已将大气气体和其他大气运输的材料困住了，当时冰被沉积了，例如植物花粉，微生物和矿物灰尘。 样品将从该埋入的冰块中收集到10米的深度，并且将测量上覆碎片中的宇宙核素浓度，并在冰中含有的底部。该地点可能包含地球上最古老的冰，对其中包含的材料的研究可能有助于研究人员更好地了解其长期生存的过程。这项工作还将有助于向科学家告知科学家，以及今天发现类似污垢覆盖冰川的火星上涉及的过程。将在Ong Valley中收集埋藏冰的样本并进行分析，以确定在矿物质和冰块中的宇宙基因核素浓度。对靶宇宙核素（Beryllium-10，Aluminum-26和Neon-21）的综合分析将使冰的年龄唯一确定，并能够确定冰的升华速率。这项研究的智力优点是明确确定冰的年龄和Ong Valley，Antarctica中冰的升华率，并更好地理解这是一个独特的南极过程，还是它在地球其他地方还是其他行星上存在。 这项工作还可能导致人们认识到地球上发现的最古老的掩埋冰，并将提供有关大气化学，古代生命形式和当时地质的直接信息的来源。 这项工作的广泛影响是，它将与许多不同领域的研究人员有关，包括冰川学，古气候学，行星地质学和生物学。几个学生还将参加该项目，进行南极现场工作，在实验室中进行测量，参加会议，参加外展活动并制作视频。研究生还将写一篇关于这项研究的论文。 结果将在科学期刊上发表，并在会议上介绍。该项目需要在南极洲进行现场工作。