Collaborative Research: MOSAiC Sea Ice Samples for Stratigraphy, Microstructure, and Inherent Optical Property Studies

合作研究：用于地层学、微观结构和固有光学特性研究的 MOSAiC 海冰样本

• 批准号: 2143546
• 负责人: Marc Oggier
• 金额: $ 44.75万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-08-01 至 2025-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2143546&HistoricalAwards=false
• 关键词: Collaborative; Research; MOSAiC; Sea; Ice

The Arctic sea ice cover is changing. As the climate has warmed, ice cover has experienced a shorter growing season and reduced spatial coverage, ice thickness has decreased, and melt is earlier and more intense. However, it is not fully understood how ice freezes, how it melts, how it responds to climate, and how climate responds to it. To fill this gap in knowledge, the investigators will study the microstructural properties of multi-year ice cores taken during the year-long Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) field campaign, where a research ship was frozen into Arctic Sea ice in the fall and allowed to drift for a year (Oct 2019 - Sept 2020). The investigators will cut thin slices from these core samples to document the ice microstructure. They will take digital images of these slices using a camera and microscope. The investigators will examine the number, size, shape, and orientation of the crystals and pockets to determine large-scale physical properties of the ice, including how it conducts heat, and reflects light. This project will improve our understanding of how sea ice may change in a warming Arctic. The investigators will create a searchable library of images and sea ice properties. The investigators will include college students in this work. Students will learn how to develop questions they can test and practice critical thinking. A filmmaker will work alongside to communicate this research to the public. The investigators will display a collection of photography and short movies at their institutions. They will share findings through scientific publications and conferences. The investigators will archive the data and results at the US Arctic Data Center.This proposal acts on an opportunity to prepare and analyze ice core samples collected from the recent year-long Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) field campaign (Oct 2019 - Sept 2020). We will use this ice to produce thin sections, create a comprehensive digital inventory of the imagery, carry out microstructural and textural analyses, generate optical data for understanding structural-optical relationships, and investigate the role of sediment inclusions in the context of changing sea ice microstructure and the partitioning of shortwave radiation. The investigators will develop a searchable library of images and microstructure properties of the sampled ice. Undergraduate students will be involved in the research, learning the scientific method, and developing critical thinking skills. The investigators will work with a filmmaker to communicate this research to the public. They will curate a collection of imagery and short movies for display at the investigators’ institutions. Findings will be disseminated through scientific publications and conferences and archived at the US Arctic Data Center.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

北极海冰盖在变化。随着气候变暖，冰盖的生长季节较短，空间覆盖率减少，冰的厚度减少，融化较早，更浓烈。但是，尚不完全了解冰，冰，如何融化，对气候的反应以及气候如何应对。为了填补这一知识的空白，研究人员将研究为期一年的多年多学科漂移观测站所采取的多年冰芯的微观结构特性，以进行北极气候研究（Mosaic）田间运动，其中一项研究船在秋季冻结到北极海冰中，并允许一年 - 2019年至2020年9月2020年）。研究人员将从这些核心样品中切成薄片，以记录冰微观结构。他们将使用摄像头和显微镜拍摄这些切片的数字图像。研究人员将检查晶体和口袋的数量，大小，形状和方向，以确定冰的大规模物理特性，包括冰的传导方式并反映光线。该项目将提高我们对海冰在变暖北极地区如何变化的理解。调查人员将创建一个可搜索的图像和海冰特性库。调查人员将在这项工作中包括大学生。学生将学习如何开发他们可以测试和练习批判性思维的问题。电影制片人将与公众合作，将这项研究传达给公众。调查人员将在其机构中展示摄影和短片的集合。他们将通过科学出版物和会议分享发现。研究人员将在美国北极数据中心归档数据和结果。该提案采取了一个机会，可以为北极气候（Mosaic）田间研究的近期多学科漂流观测站准备和分析冰核样品（2019年10月至2020年9月至2020年）。我们将使用这种冰来产生薄的部分，创建图像的全面数字清单，进行微观结构和纹理分析，生成光学数据以了解结构 - 光学关系，并研究沉积物包容性在改变海冰微观结构的背景下的作用，以及短波辐射的分配。研究人员将开发一个可搜索的图像和微观结构属性库。本科生将参与研究，学习科学方法并发展批判性思维能力。调查人员将与电影制片人合作，向公众传达这项研究。他们将策划一系列图像和短片，以在调查人员的机构上展示。调查结果将通过科学出版物和会议传播，并在美国北极数据中心存档。该奖项反映了NSF的法定任务，并使用基金会的知识分子优点和更广泛的影响审查标准来诚实地通过评估来诚实地支持。