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: 2037119
• 负责人: Jessie Creamean
• 金额: $ 66.27万
• 依托单位: Colorado State University
• 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=2037119&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) 研究计划这一更广泛工作的一部分，还将为 NSF 资助的 SNAP-TEC（通过社区参与可持续地应对北极污染）项目做出贡献，该项目包括计划于 2022 年开展的密集实地活动。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处理过程。 SNAP-TEC 的目标是提高对冬季北极室外和室内空气污染的了解，以协助北极的可持续发展并改善北极人民的空气质量。该项目将研究阿拉斯加费尔班克斯冬季大气中形成冰雾的冰核颗粒的成分。持续、浓密的冰雾事件导致能见度低，给运输和航空部门带来严重问题。这些雾事件还与高污染水平有关，可能对健康造成不利影响。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，重点测量冰雾和晴朗条件下的气溶胶及其冰核特性。该项目的目标是确定北极边界层冰核颗粒（INP）的详细来源和化学转化，确定它们在冰雾过程中如何演变，并评估INP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 数量； (2) 事件开始时捕获的 INP 成分表明那些促成冰雾形成的成分； （3）在相似的温度和湿度下，INP种群的变化会影响冰雾微物理，特别是在混合相条件下。通过这项工作提供的测量结果对于更好地了解影响能见度和人类健康的费尔班克斯冰雾至关重要。该奖项反映了 NSF 的法定使命，并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，被认为值得支持。