[China Tibet Network News] On July 29th, Lanzhou University “The Comprehensive Scientific Expedition Team for Dust Aerosol Transmission on the North Side of the Qinghai-Tibet Plateau” ended a one-month comprehensive scientific investigation in Ali, Tibet, and basically completed the scientific examination task in the Ali area. The purpose of this expedition is to study the frontier scientific issues of physical and chemical characteristics, radiative forcing and climate response of dust aerosols on the Qinghai-Tibet Plateau.
The scientific research team is building a comprehensive observation platform for physical and chemical properties of dust aerosols. The picture was provided by the scientific examination team of Lanzhou university
Using the tethered sounding system to obtain the vertical profile of high-resolution meteorological elements in the boundary layer of the Ali area
In Ali area, the strong solar radiation, the exuberant airflow, coupled with the complex terrain lead to strong local gusts, high wind speed and variable wind direction, which has a fatal impact on the tethering sounding. The team members overcome the extremely anoxic plateau environment and observed it at 6 am every day for one month. The vertical profiles of high resolution meteorological elements, tropospheric temperature, humidity vertical profile, cloud and aerosol vertical profile, aerosol mass concentration, absorption and scattering parameters, particle size spectrum, PM2.5, PM10 and TSP filter membrane samples and atmospheric aerosol single particle samples were obtained.
According to the scientific examiners, the vertical profile of high-resolution meteorological elements in the boundary layer of Ali area is of great significance for examining the structure of boundary layer, understanding the diffusion and transmission of air pollution and improving the simulation of weather and climate models. The results of this expedition will be applied to clarify the physical and chemical properties of dust aerosols in the Ali area, and will improve the accuracy of direct radiative forcing and indirect radiative forcing of atmospheric dust aerosols on the Tibetan Plateau. It is of great help to improve the assessment of the impact of dust aerosols on the energy balance of the plateau gas system.
It has been learned that the second comprehensive scientific expedition to the Qinghai-Tibet Plateau, led by the Chinese Academy of Sciences, was launched in 2017. Lanzhou University, as one of the important participants in the second Qinghai-Tibet Scientific examination, joined the dominant forces in relevant fields in China to undertake the task of 'Dust Aerosol and its Climate and Environmental effects'. The scope of the program for the project in 2019 includes the Taklimakan Desert, the Ali area of Tibet and the Yarlung Zangbo River Basin.
