Chemical composition, transformation, and cloud activation properties of submicron aerosol particles in the outflow of large major population centers

大型主要人口中心外流中亚微米气溶胶颗粒的化学成分、转化和云活化特性

• 批准号: 316589531
• 负责人: Professor Dr. Stephan Borrmann
• 金额: --
• 依托单位: Max-Planck-Institut für Chemie (Otto-Hahn-Institut)
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/316589531?language=en
• 关键词: Chemical; composition; transformation; cloud; activation

Major population centers (MPC) represent large concentrated sources of anthropogenic gaseous and particulate pollutants. The HALO mission EMeRGe focuses on the investigation of the atmospheric transport and transformation processes of these emissions in the outflow of MPCs in the free and upper troposphere. Here we propose to use aerosol mass spectrometry in combination with cloud condensation nuclei (CCN) measurements and other aerosol instrumentation for a detailed characterization of the aerosol-related processes in the outflow of MPCs. A Compact Time-of-Flight Aerosol Mass Spectrometer (C-ToF-AMS) together with a Single Particle Soot Photometer (SP2) allows for a complete chemical characterization of the submicrometer aerosol composition and the detection of photochemical transformation processes. Microphysical properties like size distribution and number concentrations in different size ranges will contribute to the characterization. Size selective CCN measurements will be linked to the observed changes in composition and oxidation state, allowing for an assessment of the influence of MPC emissions on cloud formation. Additionally, transport of the aerosol particles by deep convection into the Tropical Transition Layer (TTL) acting as a "gateway" to the lower stratosphere will be investigated.

主要人口中心 (MPC) 是人为气态和颗粒污染物的大型集中源。 HALO 任务 EMeRGe 重点研究自由层和对流层上层 MPC 流出过程中这些排放物的大气传输和转化过程。在这里，我们建议将气溶胶质谱法与云凝结核 (CCN) 测量和其他气溶胶仪器相结合，以详细表征 MPC 流出中与气溶胶相关的过程。紧凑型飞行时间气溶胶质谱仪 (C-ToF-AMS) 与单粒子烟灰光度计 (SP2) 结合使用，可以对亚微米气溶胶成分进行完整的化学表征，并检测光化学转化过程。不同尺寸范围内的尺寸分布和数量浓度等微观物理特性将有助于表征。尺寸选择性 CCN 测量将与观察到的成分和氧化态变化联系起来，从而可以评估 MPC 排放对云形成的影响。此外，还将研究通过深层对流将气溶胶颗粒输送到热带过渡层（TTL）中，作为通往低平流层的“门户”。

项目成果

Aircraft measurements of nitrous acid in excess of model predictions in the boundary layer and free troposphere

飞机在边界层和自由对流层中测量的亚硝酸超出了模型预测

• DOI: 10.5194/egusphere-egu2020-13607
• 发表时间: 2020
• 作者: Schreiner;Pfeilsticker;Rotermund;Ziereis;Schneider;Kaiser;Pozzer;Mertens
• 通讯作者: Mertens

EMeRGe - the Effect of Megacities on the transport and transformation of pollutants on the Regional and Global scales

EMeRGe - 特大城市对区域和全球范围内污染物传输和转化的影响

• DOI: 10.5194/egusphere-egu2020-19474
• 发表时间: 2020
• 作者: Burrows;Andrés Hernández;Vrekoussis;C. C.-K;Schlager;Ziereis;Schneider;Pfeilsticker;Kanaya
• 通讯作者: Kanaya