Risks of unavoidable impacts on forests at 1.5 °C with and without overshoot

IF 29.6 1区 地球科学 Q1 ENVIRONMENTAL SCIENCES
Gregory Munday, Chris D. Jones, Norman J. Steinert, Camilla Mathison, Eleanor J. Burke, Chris Smith, Chris Huntingford, Rebecca M. Varney, Andy J. Wiltshire
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Abstract

With global warming heading for 1.5 °C, understanding the risks of exceeding this threshold is increasingly urgent. Impacts on human and natural systems are expected to increase with further warming and some may be irreversible. Yet impacts under policy-relevant stabilization or overshoot pathways have not been well quantified. Here we report the risks of irreversible impacts on forest ecosystems, such as Amazon forest loss and high-latitude woody encroachment, under three scenarios that explore low levels of exceedance and overshoot beyond 1.5 °C. Long-term forest loss is mitigated by reducing global temperatures below 1.5 °C. The proximity of dieback risk thresholds to the bounds of the Paris Agreement global warming levels underscores the need for urgent action to mitigate climate change—and the risks of irreversible loss of an important ecosystem.

Abstract Image

在1.5°C(无论是否超调)下对森林产生不可避免影响的风险
随着全球变暖接近1.5°C,了解超过这一阈值的风险变得越来越紧迫。预计对人类和自然系统的影响将随着进一步变暖而增加,有些影响可能是不可逆转的。然而,与政策相关的稳定或超调路径的影响尚未得到很好的量化。在此,我们报告了在三种情况下对森林生态系统的不可逆转影响的风险,如亚马逊森林的损失和高纬度的木材侵占,探讨了1.5°C以上的低水平超标和超调。通过将全球气温降低到1.5℃以下,可以缓解长期森林损失。枯死风险阈值接近《巴黎协定》规定的全球变暖水平,这凸显了采取紧急行动减缓气候变化以及重要生态系统不可逆转丧失风险的必要性。
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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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