An approximately 50 Mm3 ice-rock avalanche on 22 March 2021 in the Sedongpu valley, southeastern Tibetan Plateau

• Published in: The Cryosphere
• Main Authors: Zhao, Chuanxi, Yang, Wei, Westoby, Matt, An, Baosheng, Wu, Guangjian, Wang, Weicai, Wang, Zhongyan, Wang, Yongjie, Dunning, Stuart
• Format: Article in Journal/Newspaper
• Language: English
• Published: Coperincus 2022
• Subjects: F700 Ocean Sciences; F800 Physical and Terrestrial Geographical and Environmental Sciences; The Cryosphere
• Online Access: https://nrl.northumbria.ac.uk/id/eprint/49097/; https://doi.org/10.5194/tc-16-1333-2022; https://nrl.northumbria.ac.uk/id/eprint/49097/1/tc-16-1333-2022.pdf

On 22 March 2021, an approximately 50 Mm3 ice-rock avalanche occurred from 6500 m a.s.l. in the Sedongpu basin, southeastern Tibet. The avalanche transformed into a highly mobile mass flow which temporarily blocked the Yarlung Tsangpo river. The avalanche flow lasted ∼ 5 min and produced substantial geomorphological reworking. This event, and previous ones from the basin, occurred concurrently with, or shortly after, positive seasonal air temperature anomalies. The occurrence of future large mass flows from the basin cannot be ruled out, and their impacts must be carefully considered given implications for sustainable hydropower and associated socioeconomic development in the region.