Variations of air freezing/thawing index during 1901—2018 in the Three-River Source Region
Fangfang CHEN, Dongliang LUO, Lei LIU, Huijun JIN, Chao LI
Journal of Glaciology and Geocryology . 2021, (2): 417 -426 .  DOI: 10.7522/j.issn.1000-0240.2021.0137