Spatial and temporal variation characteristics on the onset dates of freezing and thawing of active layer and its influence factors in permafrost regions along the Qinghai-Tibet Highway
LIU Guangyue, XIE Changwei, YANG Shuhua
Journal of Glaciology and Geocryology . 2018, (6): 1067 -1078 .  DOI: 10.7522/j.issn.1000-0240.2018.0413

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