A Study of Atmospheric Dust in the WAIS Divide Ice Core Based on Sr-Nd-Pb-He Isotopes

基于Sr-Nd-Pb-He同位素的WAIS分水岭冰芯大气尘埃研究

• 批准号: 1043471
• 负责人: Michael Kaplan
• 金额: $ 37.66万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-08-01 至 2017-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1043471&HistoricalAwards=false
• 关键词: Study; Atmospheric; Dust; WAIS; Divide; Study; Atmospheric; Dust; WAIS; Divide

1043471/KaplanThis award supports a project to obtain the first set of isotopic-based provenance data from the WAIS divide ice core. A lack of data from the WAIS prevents even a basic knowledge of whether different sources of dust blew around the Pacific and Atlantic sectors of the southern latitudes. Precise isotopic measurements on dust in the new WAIS ice divide core are specifically warranted because the data will be synergistically integrated with other high frequency proxies, such as dust concentration and flux, and carbon dioxide, for example. Higher resolution proxies will bridge gaps between our observations on the same well-dated, well-preserved core. The intellectual merit of the project is that the proposed analyses will contribute to the WAIS Divide Project science themes. Whether an active driver or passive recorder, dust is one of the most important but least understood components of regional and global climate. Collaborative and expert discussion with dust-climate modelers will lead to an important progression in understanding of dust and past atmospheric circulation patterns and climate around the southern latitudes, and help to exclude unlikely air trajectories to the ice sheets. The project will provide data to help evaluate models that simulate the dust patterns and cycle and the relative importance of changes in the sources, air trajectories and transport processes, and deposition to the ice sheet under different climate states. The results will be of broad interest to a range of disciplines beyond those directly associated with the WAIS ice core project, including the paleoceanography and dust- paleoclimatology communities. The broader impacts of the project include infrastructure and professional development, as the proposed research will initiate collaborations between LDEO and other WAIS scientists and modelers with expertise in climate and dust. Most of the researchers are still in the early phase of their careers and hence the project will facilitate long-term relationships. This includes a graduate student from UMaine, an undergraduate student from Columbia University who will be involved in lab work, in addition to a LDEO Postdoctoral scientist, and possibly an additional student involved in the international project PIRE-ICETRICS. The proposed research will broaden the scientific outlooks of three PIs, who come to Antarctic ice core science from a variety of other terrestrial and marine geology perspectives. Outreach activities include interaction with the science writers of the Columbia's Earth Institute for news releases and associated blog websites, public speaking, and involvement in an arts/science initiative between New York City's arts and science communities to bridge the gap between scientific knowledge and public perception.

1043471/kaplanthis Award支持一个项目，旨在从WAIS Divide Ice Core获得第一组基于同位素的出处数据。 WAIS缺乏数据也阻止了有关南部纬度的太平洋和大西洋部门周围不同尘埃的基本知识。特异性保证了新的WAIS ICE划分核心中灰尘上的精确同位素测量值，因为数据将与其他高频代理协同集成，例如灰尘浓度和通量，以及二氧化碳。较高的分辨率代理将在我们对同一日期，保存完好的核心上的观察结果之间弥合差距。该项目的智力优点在于，拟议的分析将有助于WAIS Divide Project Science主题。无论是主动驾驶员还是被动录音机，灰尘是区域和全球气候的最重要但最不明的组成部分之一。与尘埃气候建模者的合作和专家讨论将导致对南部纬度周围的尘埃和过去大气循环模式和气候的重要进展，并有助于将不太可能的空气轨迹排除到冰盖上。该项目将提供数据以帮助评估模型，以模拟尘埃模式和周期，以及来源，空气轨迹和运输过程的变化的相对重要性，以及在不同气候状态下对冰盖的沉积。除了与WAIS ICE核心项目直接相关的学科（包括古cop仪和尘埃古气候群落）之外的一系列学科，结果将引起人们的广泛关注。 该项目的更广泛影响包括基础设施和专业发展，因为拟议的研究将启动LDEO与其他WAIS科学家和具有气候和尘埃专业知识的WAIS科学家与建模者之间的合作。大多数研究人员仍处于职业生涯的早期阶段，因此该项目将促进长期关系。这包括来自Umaine的一名研究生，来自哥伦比亚大学的一名本科生，除了LDEO博士后科学家外，还将参与实验室工作，并可能还有一名参与国际项目Pire-Icetrics的学生。拟议的研究将扩大三个PI的科学观，他们从其他各种陆地和海洋地质学角度来到南极冰核科学。外展活动包括与哥伦比亚地球地球研究所的科学作家的互动，以获取新闻发布和相关的博客网站，公开演讲，以及参与纽约市艺术与科学社区之间的艺术/科学计划，以弥合科学知识与公众感知之间的差距。