Parametrization of the effects of atmospheric transport on absorption and cloud activation of black carbon particles in the Arctic – a new modelling-chamber approach

大气传输对北极黑碳颗粒吸收和云活化影响的参数化——一种新的模拟室方法

• 批准号: 457895178
• 负责人: Dr. Gholamali Hoshyaripour, since 7/2023
• 金额: --
• 依托单位: IMK - Atmosphärische Aerosolforschung (IMK- AAF)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/457895178?language=en
• 关键词: Parametrization; effects; atmospheric; transport; absorption

The radiative forcing estimations of black carbon aerosol (BC) are significantly affected by the difficulty of models to reproduce the temporal evolution that BC properties undergo during atmospheric ageing. This is particularly true for Arctic BC, which encounter deep chemical and physical transformation during the norward long-range transport.With the present project we thus aim to improve the understanding and parametrization of BC ageing during northward Arctic transport with a combined model and simulation-chamber approach. The three-year project will be hosted by the Institute of Meteorology and Climate Research (IMK) of the Karlsruhe Institute of Technology (KIT). In a first step, the atmospheric conditions representative of northward transport between mid and Arctic latitudes for spring, summer and winter will be identified with data from ERA5 (ECMWF Reanalysis 5th Generation) and early ICON-ART (ICOsahedral Nonhydrostatic - Aerosol and Reactive Trace gases) model runs. Those information on the latitudinal gradient of temperature, relative humidity, aerosol particle and gas phase constituents, as well as of cloud presence will be then reproduced in the AIDA (Aerosol Interactions and Dynamics in the Atmosphere) chamber during realistic long-term experiments. With these experiments I aim to quantify the impact of condensation and coagulation processes as well as cloud processing on the mixing state of BC particles and on its climate relevant properties such as light absorption and cloud activity. Additional exploratory experiments in the new AIDAdynamic (AIDAd) cloud chamber will allow investigating the role of BC in Arctic mixed phase clouds. The results of AIDA and AIDAd experiments will be used to improve the aging scheme of the global model ICON-ART. The sensitivity of ICON-ART to the improved ageing parametrization will be tested with past in-situ Arctic observation performed within the AC3 (http://www.ac3-tr.de/) and NASCENT (https://www.aces.su.se/research/projects/the-ny-alesund-aerosol-cloud-experiment-nascent-2019-2020/) project. On one side the long-term AIDA experiments will provide specific insights on BC ageing process; on the other, the close collaboration with modelling researchers will indicate the possibility to constrain ageing schemes of global model with dedicated chamber experiments. This approach might be, in the future, extended to other regions of interest, atmospheric processes or aerosol types.

黑碳气溶胶（BC）的辐射强迫估计受到模式难以重现其特性在大气老化过程中所经历的时间演变的显著影响。北极BC尤其如此，在向北的长途运输过程中，它会经历深刻的化学和物理变化。因此，在本项目中，我们旨在通过结合模型和模拟室的方法，提高对北北极运输过程中BC老化的理解和参数化。这个为期三年的项目将由卡尔斯鲁厄理工学院（KIT）气象与气候研究所（IMK）主持。第一步，将利用ERA5 （ECMWF第5代再分析）和早期ICON-ART （ICOsahedral non - hydrostatic - Aerosol and Reactive痕量气体）模式运行的数据，确定春夏冬中纬度和北极纬度之间向北输送的大气条件。在实际的长期实验中，这些关于温度、相对湿度、气溶胶粒子和气相成分以及云存在的纬度梯度的信息将在AIDA（大气中的气溶胶相互作用和动力学）室中重现。通过这些实验，我的目标是量化冷凝和凝固过程以及云处理对BC颗粒混合状态及其气候相关特性（如光吸收和云活性）的影响。在新的AIDAd动态（AIDAd）云室中进行的其他探索性实验将允许研究BC在北极混合相云中的作用。AIDA和AIDAd实验的结果将用于改进全局模型ICON-ART的老化方案。ICON-ART对改进的老化参数化的敏感性将在AC3 （http://www.ac3-tr.de/）和NASCENT （https://www.aces.su.se/research/projects/the-ny-alesund-aerosol-cloud-experiment-nascent-2019-2020/）项目中进行的过去的北极原位观测中进行测试。一方面，长期的AIDA实验将提供对BC老化过程的具体见解；另一方面，与建模研究人员的密切合作将表明，有可能通过专门的室内实验来限制全球模型的老化方案。在未来，这种方法可能会扩展到其他感兴趣的区域、大气过程或气溶胶类型。