Variability of Parameters of Single-Layer Cloud Fields over Western Siberia in Summer for the Period from 2001 to 2019 According to MODIS Data

Long-term variability of the parameters of single-layer cloud fields over Western Siberia in summer from 2001 to 2019 is estimated based on MODIS data. The seasonal mean cloud cover and cloud parameters (optical thickness, effective radius of particles, waterpath, and top height) are estimated for different single-layer cloud types by the results of cloud classification from summer (June–August) daily satellite images of the target region. Parameters of single-layer clouds are analyzed for three latitudinal zones of Western Siberia: southern (<60° N), transitional (60°–65° N), and northern (>65° N). The linear trends in the cloud cover and in cloud parameters are found for different single-layer cloud types from the long-term data series. Convective and low-level clouds in the northern and transition zone of the region under study are characterized by maximal variability of the above parameters. The effect of anomalous blocking anticyclones on some cloud parameters is shown for different cloud types in the considered latitudinal zones of Western Siberia.