Global Land Subsidence: Impact of Climate Extremes and Human Activities

IF 25.2 1区 地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS Reviews of Geophysics Pub Date : 2024-11-02 DOI:10.1029/2023RG000817
Laurie S. Huning, Charlotte A. Love, Hassan Anjileli, Farshid Vahedifard, Yunxia Zhao, Pedro L. B. Chaffe, Kevin Cooper, Aneseh Alborzi, Edward Pleitez, Alexandre Martinez, Samaneh Ashraf, Iman Mallakpour, Hamed Moftakhari, Amir AghaKouchak
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Abstract

Globally, land subsidence (LS) often adversely impacts infrastructure, humans, and the environment. As climate change intensifies the terrestrial hydrologic cycle and severity of climate extremes, the interplay among extremes (e.g., floods, droughts, wildfires, etc.), LS, and their effects must be better understood since LS can alter the impacts of extreme events, and extreme events can drive LS. Furthermore, several processes causing subsidence (e.g., ice-rich permafrost degradation, oxidation of organic matter) have been shown to also release greenhouse gases, accelerating climate change. Our review aims to synthesize these complex relationships, including human activities contributing to LS, and to identify the causes and rates of subsidence across diverse landscapes. We primarily focus on the era of synthetic aperture radar (SAR), which has significantly contributed to advancements in our understanding of ground deformations around the world. Ultimately, we identify gaps and opportunities to aid LS monitoring, mitigation, and adaptation strategies and guide interdisciplinary efforts to further our process-based understanding of subsidence and associated climate feedbacks. We highlight the need to incorporate the interplay of extreme events, LS, and human activities into models, risk and vulnerability assessments, and management practices to develop improved mitigation and adaptation strategies as the global climate warms. Without consideration of such interplay and/or feedback loops, we may underestimate the enhancement of climate change and acceleration of LS across many regions, leaving communities unprepared for their ramifications. Proactive and interdisciplinary efforts should be leveraged to develop strategies and policies that mitigate or reverse anthropogenic LS and climate change impacts.

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全球土地沉降:极端气候和人类活动的影响
在全球范围内,土地沉降(LS)通常会对基础设施、人类和环境造成不利影响。随着气候变化加剧了陆地水文循环和极端气候的严重程度,必须更好地了解极端气候(如洪水、干旱、野火等)、土地沉降及其影响之间的相互作用,因为土地沉降可改变极端事件的影响,而极端事件可推动土地沉降。此外,一些导致沉降的过程(如富含冰的永久冻土降解、有机物氧化)已被证明也会释放温室气体,加速气候变化。我们的综述旨在综合这些复杂的关系,包括导致LS的人类活动,并确定不同地貌沉降的原因和速率。我们主要关注合成孔径雷达(SAR)时代,它极大地促进了我们对世界各地地面变形的理解。最终,我们找出了差距和机遇,以帮助制定通量监测、减缓和适应战略,并指导跨学科工作,进一步加深我们对沉降和相关气候反馈的过程性理解。我们强调,随着全球气候变暖,有必要将极端事件、LS 和人类活动的相互作用纳入模型、风险和脆弱性评估以及管理实践中,以制定更好的减缓和适应战略。如果不考虑这种相互作用和/或反馈回路,我们可能会低估气候变化的加剧和许多地区LS的加速,使社区对其后果毫无准备。应利用积极主动的跨学科努力来制定战略和政策,以减轻或扭转人为 LS 和气候变化的影响。
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来源期刊
Reviews of Geophysics
Reviews of Geophysics 地学-地球化学与地球物理
CiteScore
50.30
自引率
0.80%
发文量
28
审稿时长
12 months
期刊介绍: Geophysics Reviews (ROG) offers comprehensive overviews and syntheses of current research across various domains of the Earth and space sciences. Our goal is to present accessible and engaging reviews that cater to the diverse AGU community. While authorship is typically by invitation, we warmly encourage readers and potential authors to share their suggestions with our editors.
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