IISER Mohali, Knowledge city, Sector 81, SAS Nagar, Manauli PO 140306

Imminent threat of climate warming in High Mountain Asia: Considerations from Chamoli landslide and other recent cases

Dr. Yunus Ali Pulpadan (Faculty Candidate), National institute for Environmental Studies, Tsukuba, Japan

Zoom Link

Location Online
Abstract:
Upsurge of landslide hazards in high mountains of Asia (HMA) is evident in recent years. While many of landslide hazards are event based, some large landslides are preceded by slow gravitational deformation, and can be predicted for evading catastrophes. In this talk, I present robust evidence of historical deformation in the 2021 Chamoli landslide of Himalaya using space-imaging techniques. Deformation history of Chamoli landslide suggests that a fracture developed in 2016 propagated at a sustained velocity of ~0.06 m day–1 until September 2020, and with accelerated velocity of ~0.5 m day–1 lately. Analysis of similar cases in recent times such as Yigong and Yarlong Tsangpu in HMA supported the inference on global warming induced glacier retreat and thermo-mechanical effects in enhancing the weakening of fractured rock masses in the tectonically active mountain belts. Evolving controls of landslides in post-seismic conditions and their implications for hazard assessments are also discussed.

Meeting ID: 936 4708 9484
Passcode: 414711
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