气候变暖受夏季最高气温升高的显著影响:从中国西天山的树环证据中获得的启示

IF 3.4 2区 农林科学 Q1 FORESTRY
Meng Ren, Yu Liu, Qiufang Cai, Qiang Li, Huiming Song, Changfeng Sun
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引用次数: 0

摘要

作为受全球气候变暖影响最严重的地区之一,天山经历了多次生态危机,包括冰川退缩和水资源短缺。这些山区气候变暖的主要原因是最低气温和冬季气温的升高,而最高气温的影响尚不明确。在这项研究中,利用从西天山开发的 300 年树环年表重建了 1718 年至 2017 年的夏季(6 月至 8 月)最高气温(Tmax6-8)变化。重建结果解释了观测到的 Tmax6-8 变异的 53.1%。在过去的 300 年中,Tmax6-8 重建显示出明显的年际和年代变化。20 世纪 50 年代后出现了明显的变暖趋势(0.18 ℃/十年),与最低气温和平均气温的上升速率接近。最高气温的增加也出现在整个天山山脉,其对气候变暖的影响也在增加。西天山的 Tmax6-8 变化受到频繁的火山喷发以及太阳活动和夏季北大西洋涛动的影响。这项研究揭示了气候变暖受最高气温升高的显著影响,并阐明了西天山气温变化的可能驱动机制,这将有助于气候预测。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Climate warming is significantly influenced by rising summer maximum temperatures: insights from tree-ring evidence of the Western Tianshan Mountains, China

Climate warming is significantly influenced by rising summer maximum temperatures: insights from tree-ring evidence of the Western Tianshan Mountains, China

As one of the regions most affected by global climate warming, the Tianshan mountains has experienced several ecological crises, including retreating glaciers and water deficits. Climate warming in these mountains is considered mainly to be caused by increases in minimum temperatures and winter temperatures, while the influence of maximum temperatures is unclear. In this study, a 300-year tree-ring chronology developed from the Western Tianshan Mountains was used to reconstruct the summer (June–August) maximum temperature (Tmax6–8) variations from 1718 to 2017. The reconstruction explained 53.1% of the variance in the observed Tmax6–8. Over the past 300 years, the Tmax6–8 reconstruction showed clear interannual and decadal variabilities. There was a significant warming trend (0.18 °C/decade) after the 1950s, which was close to the increasing rates of the minimum and mean temperatures. The increase in maximum temperature was also present over the whole Tianshan mountains and its impact on climate warming has increased. The Tmax6-8 variations in the Western Tianshan mountains were influenced by frequent volcanic eruptions combined with the influence of solar activity and the summer North Atlantic Oscillation. This study reveals that climate warming is significantly influenced by the increase in maximum temperatures and clarifies possible driving mechanisms of temperature variations in the Western Tianshan mountains which should aid climate predictions.

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来源期刊
CiteScore
7.30
自引率
3.30%
发文量
2538
期刊介绍: The Journal of Forestry Research (JFR), founded in 1990, is a peer-reviewed quarterly journal in English. JFR has rapidly emerged as an international journal published by Northeast Forestry University and Ecological Society of China in collaboration with Springer Verlag. The journal publishes scientific articles related to forestry for a broad range of international scientists, forest managers and practitioners.The scope of the journal covers the following five thematic categories and 20 subjects: Basic Science of Forestry, Forest biometrics, Forest soils, Forest hydrology, Tree physiology, Forest biomass, carbon, and bioenergy, Forest biotechnology and molecular biology, Forest Ecology, Forest ecology, Forest ecological services, Restoration ecology, Forest adaptation to climate change, Wildlife ecology and management, Silviculture and Forest Management, Forest genetics and tree breeding, Silviculture, Forest RS, GIS, and modeling, Forest management, Forest Protection, Forest entomology and pathology, Forest fire, Forest resources conservation, Forest health monitoring and assessment, Wood Science and Technology, Wood Science and Technology.
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