Variation in the permafrost active layer over the Tibetan Plateau during 1980–2020

被引：0

作者：

Jinglong Huang ^{[1
,2
]}

Chaofan Li ^{[2
,3
]}

Binghao Jia ^{[4
]}

Chujie Gao ^{[1
]}

Ruichao Li ^{[4
]}

机构：

[1] College of Oceanography, Hohai University

[2] Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences

[3] College of Earth and Planetary Sciences, University of Chinese Academy of Sciences

[4] State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of

来源：

Atmospheric and Oceanic Science Letters | 2024年 / 17卷 / 05期

关键词：

活动层厚度; 多年冻土; 青藏高原; 气候特征;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

活动层是多年冻土和大气之间的缓冲层,对气候波动十分敏感,其冻融变化对多年冻土区的地球生物化学循环有较大影响.本研究利用高分辨率气象数据集CMFD和陆面过程模式CLM5.0模拟分析了青藏高原1980–2020年活动层的变化.结果表明:青藏高原的活动层厚度在2000年后有显著的年代际变化,青藏高原整体活动层厚度由1980–1999的2.54 m减少到2000–2020年的2.28 m.这种变化主要发生在西部的多年冻土区,与东部相比存在明显的区域差异.在东部,多年冻土区的活动层厚度呈持续增加趋势,而不是年代际变化.此外,活动层面积在2000年也发生了年代际突变,之前持续下降,但之后几乎没有变化.本文还发现青藏高原多年冻土活动层的区域变化受到气温和降水等环境因子的显著影响,这反映了其在全球变暖背景下对气候变化的复杂响应.

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页码：36 / 41

页数：6

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