Collaborative Research: A Comprehensive Evaluation of the Interactions between Pollution and Hazardous Ice Fog in Interior Alaska

合作研究：阿拉斯加内陆污染与危险冰雾相互作用的综合评估

• 批准号: 2037091
• 负责人: Kerri Pratt
• 金额: $ 14.74万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-12-15 至 2024-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2037091&HistoricalAwards=false
• 关键词: Collaborative; Research; Comprehensive; Evaluation; Interactions

This project is part of a broader effort, the Alaskan Layered Pollution and Chemical Analysis (ALPACA) research initiative and will also contribute to the NSF-funded SNAP-TEC (Sustainably Navigating Arctic Pollution through Engaging Communities) project that includes an intensive field campaign planned for the year 2022. The goal of ALPACA is to better understand the chemical processing of air pollution during the cold and dark conditions in the wintertime in the Arctic. The objectives of SNAP-TEC are to improve the understanding of wintertime Arctic outdoor and indoor air pollution to assist in the sustainable development of the Arctic and improve air quality for Arctic peoples. This project will investigate the composition of ice nucleating particles that form ice fog in the atmosphere during the wintertime in Fairbanks Alaska. Persistent, dense ice fog events cause low visibility conditions leading to significant problems in the transportation and aviation sectors. These fog events also are associated with high pollution levels that can cause adverse health impacts.The project includes a 7-week deployment at a supersite in Fairbanks focusing on measurements of aerosols and their ice nucleation properties, both during ice fogs and clear conditions. The goals of the project are to determine the detailed sources and chemical transformations of ice nucleating particles (INPs) in the Arctic boundary layer, determine how they evolve over the course of ice fog episodes and assess whether INPs can modulate ice fog microphysics. The following hypotheses will be tested: (1) organic/inorganic aerosols from residential wood burning contribute to the INP population that facilitates ice fog formation; (2) INP composition captured at the beginning of events is indicative of those that seed ice fog formation; and (3) under similar temperatures and humidity, variation in INP populations affect ice fog microphysics, especially under mixed-phase conditions. The measurements provided through this effort are essential for better understanding the ice fogs in Fairbanks that affect visibility and human health.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.

该项目是阿拉斯加分层污染和化学分析（ALPACA）研究计划的一部分，也将为NSF资助的SNAP-TEC（通过参与社区可持续地导航北极污染）项目做出贡献，该项目包括计划于2022年进行的密集实地活动。ALPACA的目标是更好地了解北极冬季寒冷和黑暗条件下空气污染的化学过程。SNAP-TEC的目标是提高对冬季北极室外和室内空气污染的认识，以协助北极的可持续发展，改善北极人民的空气质量。该项目将调查冬季在阿拉斯加州费尔班克斯大气中形成冰雾的冰成核颗粒的组成。持续的、密集的冰雾事件导致低能见度条件，导致运输和航空部门的重大问题。这些雾事件也与高污染水平有关，可能导致不利的健康影响。该项目包括在费尔班克斯的一个超级站点进行为期7周的部署，重点是在冰雾和晴朗条件下测量气溶胶及其冰成核特性。该项目的目标是确定北极边界层中冰成核粒子（INPs）的详细来源和化学转化，确定它们在冰雾事件过程中如何演变，并评估INPs是否可以调节冰雾微物理。将测试以下假设：（1）住宅木材燃烧产生的有机/无机气溶胶有助于促进冰雾形成的INP种群;（2）事件开始时捕获的INP成分指示那些种子冰雾形成的成分;（3）在相似的温度和湿度下，INP种群的变化影响冰雾微物理，特别是在混合相条件下。通过这项工作提供的测量是必不可少的，更好地了解在费尔班克斯冰雾影响能见度和人类健康。这个奖项反映了NSF的法定使命，并已被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估的支持。