Atmospheric physicochemical multi-parameter horizonal and vertical mitigation response of two recent Sheveluch volcano eruptions in Kamchatka

Based on the two Sheveluch eruption events on April 10, 2023 and August 17, 2024, the comprehensive phenomenon of the two volcanic eruption events is described from the analysis of the seismic activity sequence of the lithosphere to the distribution of atmospheric materials and heat. The seismic distribution in Sheveluch volcanic area is mainly shallow-source (0-70 km) and small-earthquake (ML 3.5-4.0). In term of the horizontal evolution of SO2, the SO₂ eruption amount and the duration on April 10, 2023 is larger and longer than on August 17, 2024. In the time series, SO₂ and UV aerosol index obviously respond to the volcano eruption activity. In the vertical dimention, the vertical wind field data show that the SO₂ eruption height is about 100~125hpa, and the boundary layer height between the troposphere and the stratosphere in the Sheveluch volcano region is about 50hpa. The noticeable variation of the temperature profile of the two volcanic eruptions was below 10hpa. Comparing the ozone profile with the temperature profile, the ozone depletion may result in a decrease in stratospheric temperature. The horizontal and vertical migration processes of atmospheric materials during volcanic eruption are described, which is of great significance for the study of multi-layer coupling mechanism.