Upper troposphere and lower stratosphere transport pathways of aerosol and tracers associated with the Asian monsoon circulation (AeroTrac)

亚洲夏季风(ASM)是北半球北部夏季的主导环流模式。对气溶胶和示踪剂分布的研究表明，ASM有效地抬升了对流层空气和污染物，在平流层最低层形成了一个明显稳定的储气库，并通过多条路径将空气释放到平流层下部。我们的项目将解决两个公开的关键问题：“与ASM相关的运输障碍的渗透性有多大？”和“ASM环流如何控制对流层-平流层交换？”这些问题将通过综合观测和拉格朗日运输分析加以解决。合作伙伴提供的测量数据集包括全球卫星测量、ASM反气旋内的地面遥感和现场气球测量，以及ASM反气旋外的飞机现场测量。在这个项目中，我们将使用两个拉格朗日输运模型，全球化学输运模型CLAMS和拉格朗日粒子弥散模型MPTRAC。该项目的主要目标是：i)为ASM的输送研究汇编全面的观测数据；ii)编制新的人为和自然来源的一氧化碳以及火山来源的二氧化硫的排放清单；iii)详细分析与ASM环流有关的对流层和平流层下部的输送路径。德国美因茨大学和Jülich超级计算中心以及中国科学院大气物理研究所和位于中国的广州大学的大气科学家和计算机科学家将在向2018年中德双边联合研究项目提出的项目框架内共同努力解决这些问题和目标。

The Asian summer monsoon (ASM) is the governing circulation pattern in the Northern Hemisphere during boreal summer. Studies investigating aerosol and tracer distributions show that the ASM effectively uplifts tropospheric air and pollutants, forms an apparently stable reservoir in the lowermost stratosphere, and releases air into the lower stratosphere via multiple pathways. Our project will address two open key questions: "How permeable is the transport barrier associated with the ASM?" and "How does the ASM circulation control troposphere-stratosphere exchange?" These questions will be addressed by making use of comprehensive observations and Lagrangian transport analyses. The measurement data sets contributed by the partners comprise global satellite measurements, ground-based remote sensing and in-situ balloon measurements within the ASM anticyclone, and in-situ aircraft measurements outside of the ASM anticyclone. In this project we will use two Lagrangian transport models, the global chemistry-transport model CLaMS and the Lagrangian particle dispersion model MPTRAC. The main objectives of the project are i) to compile comprehensive observational data for transport studies regarding the ASM, ii) to create new emission inventories for carbon monoxide from anthropogenic and natural sources as well as sulfur dioxide of volcanic origin, and iii) to analyze transport pathways in the troposphere and lower stratosphere connected with the ASM circulation in detail. Atmospheric scientist and computer scientists at the University of Mainz and the Jülich Supercomputing Centre in Germany and at the Institute of Atmospheric Physics of the Chinese Academy of Sciences and the University of Guangzhou in China will work together to address these questions and objectives in the framework of the project proposed to the 2018 bilateral Joint Sino-German Research Projects call.