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: 2143547
• 负责人: Bonnie Light
• 金额: $ 25.92万
• 依托单位: University of Washington
• 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=2143547&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.

北极海冰覆盖面积正在发生变化。随着气候变暖，冰盖的生长期缩短，空间覆盖范围缩小，冰层厚度减少，融化更早，更剧烈。然而，人们还没有完全了解冰是如何冻结的，它是如何融化的，它如何对气候做出反应，以及气候如何对它做出反应。为了填补这一知识空白，研究人员将研究在为期一年的多学科漂移观测站北极气候研究（MOSAiC）实地活动期间拍摄的多年冰芯的微观结构特性，在那里，一艘研究船在秋天被冻成了北极海冰，并被允许漂流了一年（2019年10月至2020年9月）。研究人员将从这些核心样本中切割薄片，以记录冰的微观结构。他们将使用相机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，包括它如何传导热量和反射光。该项目将提高我们对北极变暖时海冰可能如何变化的理解。研究人员将创建一个可搜索的图像和海冰特性库。调查人员将包括大学生在这项工作中。学生将学习如何开发他们可以测试和实践批判性思维的问题。一位电影制片人将与他们一起工作，向公众宣传这项研究。调查人员将在他们的机构展示一系列摄影和短片。他们将通过科学出版物和会议分享研究结果。研究人员将把数据和结果存档在美国北极数据中心。这项提议是为了准备和分析从最近为期一年的北极气候研究多学科漂流观测站（MOSAiC）实地活动（2019年10月至2020年9月）收集的冰芯样本。我们将使用这种冰来制作薄切片，创建一个全面的数字库存的图像，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，并调查沉积物夹杂物在不断变化的海冰微观结构和短波辐射的分区的背景下的作用。研究人员将开发一个可搜索的图像库和样本冰的微观结构特性。本科生将参与研究，学习科学方法，发展批判性思维能力。研究人员将与电影制片人合作，向公众宣传这项研究。他们将策划一系列图像和短片，在调查机构展出。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。