Changing Southern/Lower Limits of Latitudinal/Mountain Permafrost (SLLP/LLMP) in Northeast China: An Overview

作者：Huijun Jin, Shuai Huang, Xiaoying Jin, Junhe Liang, Xiaoying Li, Anyuan Li, Lanzhi Lü, Raul‐David Șerban, Leonid Gagarin, Yongping Wang · 发表于：Permafrost and Periglacial Processes · 年份：2025 · DOI：10.1002/ppp.2285 · 被引用次数：11 · 研究领域：Climate change and permafrost、Cryospheric studies and observations、Arctic and Antarctic ice dynamics

ABSTRACT This paper investigates the spatiotemporal dynamics and their changes of the southern limit of latitudinal permafrost (SLLP) and the lower limit of mountain permafrost (LLMP) in Northeast China, emphasizing the roles of climate change and human activities. Permafrost in this region is primarily distributed in the northern parts of the Da and Xiao Xing’anling mountain ranges and in the upper parts of the Changbai Mountains and at the summits of the Huanggangliang Mountains in the southern part of the Da Xing’anling Mountain Range. Permafrost degradation, ongoing since at least the local Holocene Megathermal Period (8.5–6.0 ka BP), has intermittently reversed during cooler climatic intervals but continues to exert significant impacts on regional environments, infrastructure stability, and carbon storage. Notably, the northward retreats of the SLLP since the mid‐19 th century underscore the sustained nature of this degradation, especially in southern patchy permafrost zones increasingly sensitive to warming and anthropogenic influences. LLMP variability is similarly shaped by a combination of climatic, hydrometeorological, ecological, and topographic factors. The distributions of SLLP and LLMP are further complicated by the presence of relict and sporadic permafrost, as well as the hydrothermal effects of vegetation and snow cover. Addressing the challenges of mapping and modeling boreal permafrost in Northeast China requires comprehensive field investigations, long‐ter...