*3.3. Preliminary Analyses of the Interaction Mechanism between the Summer Jet Stream and Pollutants*

The East Asian upper-level jet has a three-dimensional structure, and a series of secondary circulations are generated around the upper-level jet stream, which are associated with surface pollutants. The idea of using statistical methods to study the interaction between them is to find out the medium existing in the interaction between them. That is, to find out the surface meteorological variable that connects to the upper-level jet stream and then interacts with surface pollutants. Due to the exchange of the energy, matter and momentum between the upper-level jet stream and the surface, the surface meteorological variables, such as the humidity, temperature, zonal wind and meridional wind, are selected in the study. The correlation analysis method is used to explore the relationships between the upper-level jet stream and the surface meteorological variables including the humidity, temperature, surface zonal wind and surface meridional wind as well as the relationships between the surface meteorological variables and the surface pollutants.
