Qinghai: A new study has identified the types and formation mechanisms of heavy precipitation in the southeastern Qinghai-Tibet Plateau, shedding light on critical meteorological processes in the region. The study, conducted by researchers from the Institute of Tibetan Plateau Research under the Chinese Academy of Sciences, was published online in the Science Bulletin.

According to Namibia Press Agency, the region of southeastern Qinghai-Tibet Plateau is the foremost area for summer heavy precipitation on the plateau. Heavy precipitation plays a crucial role in replenishing water resources, maintaining the local glacier mass balance, and supporting ecosystems on the plateau. However, it also has the potential to trigger secondary disasters in this region.

The study highlights the importance of identifying the large-scale circulation types and dynamics that drive summer heavy precipitation in this area. Researchers employed the hierarchical clustering method and analyzed meteorological observation data collected over 35 years to explore the types and formation mechanisms of heavy precipitation.

Two distinctive atmospheric circulation patterns associated with heavy precipitation were identified: the Qinghai-Tibet Plateau vortex type and the mid-latitude trough type. The Qinghai-Tibet Plateau vortex type events are characterized by eastward and dry-to-wet potential vorticity progression processes. In contrast, the mid-latitude trough type events are linked to the intrusion of a deep extratropical trough into the region of southeastern Qinghai-Tibet Plateau.

The Qinghai-Tibet Plateau, often referred to as "Asia's water tower," serves as a critical water resource reservoir, exerting significant influence on regional and global water cycles and ecosystems. The findings from this study advance our understanding of the complex mechanisms that govern summer heavy precipitation in the southeastern Qinghai-Tibet Plateau.