CAFE-Pacific Umbrella – Chemistry of the Atmosphere: Field Experiment in the PacificUmbrella proposal for DFG-funded university partners

CAFE-Pacific Umbrella â 大气化学：PacificUmbrella 为 DFG 资助的大学合作伙伴提出的现场实验

• 批准号: 502272415
• 负责人: Professor Dr. Joachim Curtius
• 金额: --
• 依托单位: Institut für Atmosphäre und Umwelt (IAU)
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/502272415?language=en
• 关键词: CAFE; Pacific; Umbrella; Chemistry; Atmosphere

The CAFE-Pacific mission with the HALO research aircraft studies air chemistry and aerosol formation in the tropical upper troposphere above the Indo-Pacific ocean. The base for the measurement flights is in Cairns, Australia. From there, in the period from December 2023 to January 2024, largely unpolluted air masses over the Pacific as well as measurements over the Indo-Pacific in the north, over Australian coastal regions and over the rainforest of Australia are to be carried out. As part of the CAFE-Pacific mission, HALO is equipped with a large set of instrumentation that allow a very comprehensive characterization of the trace substances that are decisive for the chemical processing in the gas phase. Various radicals, reactive nitrogen compounds, sulfur compounds, organic substances and numerous aerosol parameters are measured. A special focus of the measurements are investigations in the outflow of deep convection. In particular, the chemical oxidation steps for substances such as dimethylsulfite are to be investigated. The oxidation products are of low volatility, so that strong particle formation events occur. Furthermore, the oxidation capacity of the air in the tropical troposphere is investigated.

CAFE-太平洋飞行任务与Halo研究飞机一起研究印度洋-太平洋上空热带对流层上层的空气化学和气溶胶形成。测量飞行的基地在澳大利亚的凯恩斯。从那里开始，从2023年12月到2024年1月，将在太平洋上空以及北部印度-太平洋、澳大利亚沿海地区和澳大利亚热带雨林上空进行基本上没有污染的气团的测量。作为CAFE-太平洋任务的一部分，Halo配备了一套大型仪器，可以非常全面地表征对气相化学处理具有决定性作用的痕量物质。测量了各种自由基、活性氮化合物、硫化物、有机物和众多气溶胶参数。测量的一个特别焦点是对深对流流出的研究。特别是，对二甲基亚硫酸盐等物质的化学氧化步骤进行了研究。氧化产物的挥发性很低，因此发生了强烈的颗粒形成事件。此外，还研究了热带对流层空气的氧化能力。