Weekly thermal-hydrologic activation windows of retrogressive thaw slumps: Implications for early warning of slope instability in degrading permafrost regions - Shunshun Qi; Guoyu Li; Wei Ma; Dun Chen; Fujun Niu; Mingtang Chai; Yougang Yang; Jiawei Yang; Fei Wang; Qingsong Du; Yapeng Cao; Xiaoran Duan (Engineering Geology, 2026)