Extreme Summer Precipitation Characteristics and Associated Water Vapor Transport in Southern Xinjiang

In this study, we analyzed the spatial and temporal characteristics of extreme precipitation in summer southern Xinjiang (SXJ) using CN05.1 daily data, National Centers for Environmental Prediction (NCEP) monthly average ERA5 four-times-daily reanalysis data from 1961 to 2020, determined interdecadal variation precipitation, further explored circulation mechanisms anomalous water vapor transport associated with changes precipitation. The results showed that days, contribution SXJ all increased significantly, turnaround occurring 1986. Enhanced vertical upward motion, greater convergence at lower levels, a more unstable atmospheric convection led an increase along border region. eastward Pacific Ocean southward Indian provided transport, boundary flux trend its correlated distribution played important role At heights, dominant longitudinal fluxes were concentrated middle upper layers, whereas latitudinal layers.