Identifying the Origins of Summertime Arctic Cloud Condensation Nuclei Using Online Fine Aerosol Composition Measurements

利用在线精细气溶胶成分测量确定夏季北极云凝核的起源

• 批准号: 1738629
• 负责人: Eric Saltzman
• 金额: $ 41.43万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-09-01 至 2021-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1738629&HistoricalAwards=false
• 关键词: Identifying; Origins; Summertime; Arctic; Cloud

Clouds play a critical role in the radiation budget and climate of the Arctic, but the origin of the particles on which these cloud droplets form is a relative unknown. This research project will provide an opportunity to take specialized measurements of microscopic particles onboard an ice breaker in the Arctic Ocean. By understanding the sources of cloud particles, scientists will be better able to determine whether cloud conditions will change in a world with less sea ice, and thus improve long-term forecasts of climate in this critical part of the world. Education and outreach activities will also be conducted during the project, including an online photo blog during the research cruise.The research team will investigate the origin of fine particle aerosols and cloud condensation nuclei over the summertime high Arctic Ocean. Field measurements will be taken from the Swedish icebreaker Oden during August-September 2018. The Thermal Desorption Chemical Ionization Mass Spectrometer will be deployed to measure the composition of ambient size-resolved 10-200nm diameter aerosols, targeting the accumulation, Aitken and nucleation modes. Total ambient sub-micron aerosols will also be collected using a Particle into Liquid Sampler (PILS) and subsequently analyzed offline. The goal of the project is to measure the relative contributions to Arctic aerosol of biogenic polysaccharide material, sea salt, other organics, and other salts, on a size-resolved basis. A successful project would result in determining what processes are responsible for aerosols of different sizes, which would lead to the ability to infer the most important CCN sources in the region.

云在北极的辐射预算和气候中发挥着至关重要的作用，但形成这些云滴的颗粒的起源相对未知。 该研究项目将提供对北冰洋破冰船上的微观颗粒进行专门测量的机会。 通过了解云颗粒的来源，科学家将能够更好地确定海冰减少的世界中云状况是否会发生变化，从而改善对世界这一关键地区气候的长期预测。 该项目期间还将开展教育和外展活动，包括研究巡航期间的在线照片博客。研究小组将调查夏季北冰洋上空细颗粒气溶胶和云凝结核的起源。 现场测量将于 2018 年 8 月至 9 月在瑞典破冰船 Oden 上进行。热解吸化学电离质谱仪将用于测量环境尺寸分辨的 10-200 nm 直径气溶胶的成分，针对累积、Aitken 和成核模式。 还将使用颗粒液体采样器 (PILS) 收集环境亚微米气溶胶总量，并随后进行离线分析。 该项目的目标是在尺寸分辨的基础上测量生物多糖材料、海盐、其他有机物和其他盐对北极气溶胶的相对贡献。 一个成功的项目将确定哪些过程导致了不同尺寸的气溶胶，从而能够推断该地区最重要的 CCN 来源。

项目成果

The development of a miniaturised balloon-borne cloud water sampler and its first deployment in the high Arctic

小型气球载云水采样器的开发及其在北极高海拔地区的首次部署

• DOI: 10.1080/16000889.2021.1915614
• 发表时间: 2021
• 期刊: Tellus B: Chemical and Physical Meteorology
• 作者: Zinke, Julika;Salter, Matthew E.;Leck, Caroline;Lawler, Michael J.;Porter, Grace C.;Adams, Michael P.;Brooks, Ian M.;Murray, Benjamin J.;Zieger, Paul
• 通讯作者: Zieger, Paul