This study investigates the weakening of Tibetan Plateau vortices (TPVs) over the past few decades, focusing on the central-western region of the Tibetan Plateau. Using ERA5 reanalysis data from 1979 to 2022, the research identifies a clear decreasing trend in both the intensity and frequency of TPVs in this area. The weakening is accompanied by a decline in the strength of associated vertical upward motion. The study employs the quasi-geostrophic (QG) omega equation to analyze the dynamic, diabatic, and topographic factors influencing vertical motion during different phases of TPV activity. The results indicate that the main reason for the weakened TPVs is the diminishing upper-level jet stream, which exerts dynamic forcing on the system. In the later stages, intensive moisture transport induces heightened diabatic vertical motion, but this effect is not sufficient to counterbalance the diminishing dynamic influence. The findings suggest a significant shift in TPV activity, transitioning from a dynamic-dominated regime to a latent heating-dominated diabatic regime. This transition is attributed to global warming, which intensifies latent heating and moisture transport, leading to a weakening of vertical motion and a decrease in TPV activity. The study highlights the importance of understanding the complex mechanisms influencing TPV behavior, which has implications for water resource management and disaster mitigation in this critical region. The research also underscores the need for further exploration of additional factors, such as boundary layer friction, to gain a more comprehensive understanding of the underlying physical processes driving changes in TPV activity.This study investigates the weakening of Tibetan Plateau vortices (TPVs) over the past few decades, focusing on the central-western region of the Tibetan Plateau. Using ERA5 reanalysis data from 1979 to 2022, the research identifies a clear decreasing trend in both the intensity and frequency of TPVs in this area. The weakening is accompanied by a decline in the strength of associated vertical upward motion. The study employs the quasi-geostrophic (QG) omega equation to analyze the dynamic, diabatic, and topographic factors influencing vertical motion during different phases of TPV activity. The results indicate that the main reason for the weakened TPVs is the diminishing upper-level jet stream, which exerts dynamic forcing on the system. In the later stages, intensive moisture transport induces heightened diabatic vertical motion, but this effect is not sufficient to counterbalance the diminishing dynamic influence. The findings suggest a significant shift in TPV activity, transitioning from a dynamic-dominated regime to a latent heating-dominated diabatic regime. This transition is attributed to global warming, which intensifies latent heating and moisture transport, leading to a weakening of vertical motion and a decrease in TPV activity. The study highlights the importance of understanding the complex mechanisms influencing TPV behavior, which has implications for water resource management and disaster mitigation in this critical region. The research also underscores the need for further exploration of additional factors, such as boundary layer friction, to gain a more comprehensive understanding of the underlying physical processes driving changes in TPV activity.