日渐消退的雪原变成了高山地带的绿化热点

IF 29.6 1区 地球科学 Q1 ENVIRONMENTAL SCIENCES
Philippe Choler, Arthur Bayle, Noémie Fort, Simon Gascoin
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引用次数: 0

摘要

季节性积雪覆盖持续时间的减少导致温带山区植物生长的条件发生变化。然而,在复杂的地形中捕捉多年代尺度的积雪覆盖和植被动态的复杂性是一项巨大的挑战。在这里,我们展示了在过去 40 年中,欧洲山脉的绿化趋势随着季节性积雪消失的年度日期而增加。通过结合高空间分辨率的卫星数据和缩小尺度的气候再分析,我们发现积雪覆盖时间的减少对生长季节热量积累的影响超过了温度的升高。这种热量积累是在融雪晚期观测到的明显绿化现象的主要驱动因素,尤其是在植被稀疏的北向山麓。我们的研究结果全面阐述了凋落雪地植被的快速变化,并强调了雪盖动力学在揭示温带高寒区绿化复杂性方面所起的关键作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Waning snowfields have transformed into hotspots of greening within the alpine zone

Waning snowfields have transformed into hotspots of greening within the alpine zone

Declining seasonal snow cover duration leads to changing conditions for plant recruitment and growth in temperate mountains. Yet capturing the intricacy of snow cover and vegetation dynamics at multidecadal scale in complex terrains poses a great challenge. Here we show that over the last four decades the greenness trend in European mountains increases with the annual date of the seasonal snow cover disappearance. By combining satellite data of high spatial resolution and downscaled climate re-analysis we show that the reduction in snow cover duration surpasses elevated temperatures in influencing heat accumulation during the growing season. This accumulation is a key driver of the pronounced greening observed in late snow-melting sites, particularly in sparsely vegetated, north-facing screes. Our results provide a comprehensive account of rapid vegetation changes in waning snowfields and highlight the pivotal role played by snow cover dynamics to unravel the complexity of greening within the temperate alpine zone.

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来源期刊
Nature Climate Change
Nature Climate Change ENVIRONMENTAL SCIENCES-METEOROLOGY & ATMOSPHERIC SCIENCES
CiteScore
40.30
自引率
1.60%
发文量
267
审稿时长
4-8 weeks
期刊介绍: Nature Climate Change is dedicated to addressing the scientific challenge of understanding Earth's changing climate and its societal implications. As a monthly journal, it publishes significant and cutting-edge research on the nature, causes, and impacts of global climate change, as well as its implications for the economy, policy, and the world at large. The journal publishes original research spanning the natural and social sciences, synthesizing interdisciplinary research to provide a comprehensive understanding of climate change. It upholds the high standards set by all Nature-branded journals, ensuring top-tier original research through a fair and rigorous review process, broad readership access, high standards of copy editing and production, rapid publication, and independence from academic societies and other vested interests. Nature Climate Change serves as a platform for discussion among experts, publishing opinion, analysis, and review articles. It also features Research Highlights to highlight important developments in the field and original reporting from renowned science journalists in the form of feature articles. Topics covered in the journal include adaptation, atmospheric science, ecology, economics, energy, impacts and vulnerability, mitigation, oceanography, policy, sociology, and sustainability, among others.
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