Turbulent Aerosol Fluxes in the central Arctic during the ARTofMELT expedition

ARTofMELT 探险期间北极中部的湍流气溶胶通量

• 批准号: 521926906
• 负责人: Professor Dr. Andreas B. Held
• 金额: --
• 依托单位: Fachgebiet Umweltchemie und Luftreinhaltung
• 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/521926906?language=en
• 关键词: Turbulent; Aerosol; Fluxes; central; Arctic

The central Arctic region is warming much faster than other parts of the world or the globe on average. Episodic transport of warm and moist air masses to the Arctic region, so called Atmospheric Rivers, contribute to Arctic surface warming and also affect the onset of the sea ice melt season in springtime and its feedback to aerosol and cloud properties. In this project, vertical turbulent aerosol particle fluxes will be measured in the central Arctic Ocean during the ARTofMELT expedition 2023 onboard the Swedish research icebreaker Oden in order to investigate how these fluxes vary under different surface conditions and meteorological conditions. A focus of ARTofMELT will be on the impact of warm and moist air mass intrusions on sea ice melt dynamics and the associated interactions and feedback processes between sea ice, clouds, aerosol particles, and the atmospheric radiation budget. Turbulent aerosol fluxes will be measured before and after the onset of sea ice melt in the Arctic spring, and during warm and moist air mass intrusion events using three different approaches. Eddy covariance aerosol flux measurements will be carried out on a mast on the foredeck of the icebreaker. Aerosol emission from open leads will be estimated using a floating chamber system, and flux-gradient relationships will be evaluated using near-surface particle concentration profiles on ice floes. This project will contribute to the international ARTofMELT expedition and to the ongoing DFG-funded research project “Vertical Turbulent Aerosol Particle Transport above open Water and Ice in the central Arctic during Summertime – Aerosol particle sources and transformation in the Arctic marine boundary layer”.

北极中部地区的变暖速度比世界其他地区或平均地球仪要快得多。暖湿空气团向北极地区的间歇性输送，即所谓的大气河流，有助于北极表面变暖，也影响春季海冰融化季节的开始及其对气溶胶和云特性的反馈。在该项目中，将在2023年瑞典研究破冰船奥登号上的ARTofMELT考察期间在北冰洋中部测量垂直湍流气溶胶粒子通量，以研究这些通量在不同的表面条件和气象条件下如何变化。ARTofMELT的一个重点是温暖和潮湿的空气质量入侵对海冰融化动力学的影响，以及海冰，云，气溶胶粒子和大气辐射收支之间的相关相互作用和反馈过程。湍流气溶胶通量将在北极春季海冰融化开始之前和之后，以及在暖湿气团入侵事件期间使用三种不同的方法进行测量。涡动协方差气溶胶通量测量将在破冰船前甲板的桅杆上进行。将使用浮动室系统估计开放式引线的气溶胶排放量，并将使用浮冰上近表面颗粒浓度分布图评价通量-梯度关系。该项目将有助于国际ARTofMELT考察和DFG资助的正在进行的研究项目“夏季北极中部开阔水面和冰面上的垂直湍流气溶胶颗粒输送-北极海洋边界层中的气溶胶颗粒来源和转化”。