Evidence of elevation-dependent warming from the Chinese Tian Shan
Evidence of elevation-dependent warming from the Chinese Tian Shan
复制标题
来自中国天山的海拔相关变暖的证据
DOI：
10.5194/tc-15-5765-2021
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发表时间：
2021-12-20
期刊：
影响因子：
5.2
通讯作者：
Gao, Jianyun
中科院分区：
文献类型：
--
作者：
Gao, Lu;Deng, Haijun;Gao, Jianyun
气温的增暖率随海拔升高而增大的现象称为海拔依赖增暖（EDW）。研究表明，EDW可加速冰川退缩和积雪融化，对区域生态环境产生重大影响。由于高山地区缺乏高密度的地面观测，关于EDW的存在着广泛的争议。目前的证据主要来自典型的高山地区，如瑞士阿尔卑斯山、科罗拉多落基山脉、热带安第斯山脉和西藏高原-喜马拉雅山脉。在其他山脉，特别是在干旱地区，有罕见的证据。在这项研究中，中国天山（CTM）的EDW特征（区域变暖放大和高度变暖放大）使用1979年至2016年独特的高分辨率（1公里，6小时）气温数据集（CTMD）检测。结果表明，在不同海拔高度、不同时间尺度上，EDW信号都比较明显。春季，尤其是3月，CTM表现出明显的区域增暖放大效应，最低气温、平均气温和最高气温的增暖趋势均大于中国大陆。在12个月内，三种温度下，不同海拔阈值以上的EDW显著性差异较大。冬季最低气温的增暖率表现出明显的海拔依赖性（p
The phenomenon in which the warming rate of air temperature is amplified with elevation is termed elevation-dependent warming (EDW). It has been clarified that EDW can accelerate the retreat of glaciers and melting of snow, which can have significant impacts on the regional ecological environment. Owing to the lack of high-density ground observations in high mountains, there is widespread controversy regarding the existence of EDW. Current evidence is mainly derived from typical high-mountain regions such as the Swiss Alps, the Colorado Rocky Mountains, the tropical Andes and the Tibetan Plateau-Himalayas. Rare evidence in other mountain ranges has been reported, especially in arid regions. In this study, EDW features (regional warming amplification and altitude warming amplification) in the Chinese Tian Shan (CTM) were detected using a unique high-resolution (1 km, 6-hourly) air temperature dataset (CTMD) from 1979 to 2016. The results showed that there were significant EDW signals at different altitudes on different timescales. The CTM showed significant regional warming amplification in spring, especially in March, and the warming trends were greater than those of continental China with respect to three temperatures (minimum temperature, mean temperature and maximum temperature). The significance values of EDW above different altitude thresholds are distinct for three temperatures in 12 months. The warming rate of the minimum temperature in winter showed a significant elevation dependence (p