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Achieving the Kunming–Montreal global biodiversity targets for blue carbon ecosystems 实现昆明-蒙特利尔蓝碳生态系统全球生物多样性目标
Pub Date : 2024-07-02 DOI: 10.1038/s43017-024-00566-6
Chuancheng Fu, Alexandra Steckbauer, Hugo Mann, Carlos M. Duarte
The Kunming–Montreal Global Biodiversity Framework (KM-GBF) provides a major impetus for the restoration and conservation of blue carbon ecosystems to address the biodiversity and climate crises. In this Perspective, we translate the KM-GBF targets for blue carbon ecosystems into quantitative metrics, outline action that must be taken to achieve these goals and quantify the associated climate benefits. To achieve the KM-GBF targets, net mangrove, saltmarsh and seagrass losses of 187–190 km2, 76–126 km2 and 3,068–3,597 km2, respectively, must be avoided annually from 2030 onwards and 23,693–24,369 km2, 10,467–17,296 km2 and 90,601–106,215 km2 of these ecosystems must be restored. Achieving the KM-GBF targets would contribute 2.8% of the reduction of carbon emissions needed to limit anthropogenic warming to 2 °C by 2030. However, the cost of achieving the targets (US$520.1 billion yr–1) far exceeds the amount pledged ($200 billion yr–1) for all ecosystems. Thus, research is needed to develop cost-effective restoration and conservation technologies, along with innovative financial models to incentivize investments in nature. Additionally, blue carbon actions must be embedded within National Biodiversity Strategies and Action Plans to ensure that the targets are met. Degradation and loss of blue carbon ecosystems contributes to climate change, weakens coastal protection and threatens biodiversity. This Perspective outlines the actions required to achieve goals to restore and protect these ecosystems.
昆明-蒙特利尔全球生物多样性框架(KM-GBF)为恢复和保护蓝碳生态系统以应对生物多样性和气候危机提供了重要动力。在本《视角》中,我们将 KM-GBF 的蓝碳生态系统目标转化为量化指标,概述实现这些目标必须采取的行动,并量化相关的气候效益。要实现知识管理-全球蓝碳论坛目标,从 2030 年起,每年必须避免红树林、盐沼和海草的净损失分别为 187-190 平方公里、76-126 平方公里和 3068-3597 平方公里,必须恢复这些生态系统的面积分别为 23693-24369 平方公里、10467-17296 平方公里和 90601-106215 平方公里。实现知识管理-全球生物多样性框架目标将有助于减少 2.8%的碳排放量,从而到 2030 年将人为变暖限制在 2 °C。然而,实现这些目标的成本(5,201 亿美元/年-1)远远超过了对所有生态系统的承诺金额(2,000 亿美元/年-1)。因此,需要研究开发具有成本效益的恢复和保护技术,同时采用创新的金融模式来激励对自然的投资。此外,蓝碳行动必须纳入国家生物多样性战略和行动计划,以确保实现目标。
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引用次数: 0
Challenging perceptions of underground hydrogen storage 挑战对地下储氢的认识
Pub Date : 2024-07-02 DOI: 10.1038/s43017-024-00572-8
Katriona Edlmann
Underground hydrogen storage (UHS) will be an essential part of the energy transition. Over 45 pilot projects are underway to reduce the technical and regulatory risks of UHS, but negative perceptions must be addressed to ensure that hydrogen’s role in achieving net zero targets can be realized.
地下储氢(UHS)将成为能源转型的重要组成部分。超过 45 个试点项目正在进行中,以降低地下储氢系统的技术和监管风险,但必须消除负面看法,以确保氢能在实现净零目标方面发挥作用。
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引用次数: 0
Political obstacles to carbon capture and storage for carbon removal 碳捕集与碳封存除碳的政治障碍
Pub Date : 2024-07-02 DOI: 10.1038/s43017-024-00574-6
Nils Markusson
Using carbon dioxide capture and storage (CCS) for carbon removal is crucial to climate policy, but implementation at scale is at risk owing to political obstacles. Climate policies must avoid relying on empty promises of CCS for carbon removal without necessary financial resourcing and support emissions reductions separately from carbon removal.
利用二氧化碳捕集与封存(CCS)进行碳清除对气候政策至关重要,但由于政治障碍,大规模实施面临风险。气候政策必须避免在没有必要财政资源的情况下依赖空洞的 CCS 碳清除承诺,并在碳清除之外单独支持减排。
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引用次数: 0
Using drones to sample volcanic plumes 使用无人机对火山羽流进行采样
Pub Date : 2024-06-26 DOI: 10.1038/s43017-024-00570-w
Laura Wainman
Laura Wainman explains how drones can be used to sample the composition and dynamics of volcanic plumes.
劳拉-温曼(Laura Wainman)解释了如何利用无人机对火山羽流的成分和动态进行采样。
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引用次数: 0
Phase-sensitive radar measurements of glacial processes 对冰川过程进行相位敏感的雷达测量
Pub Date : 2024-06-19 DOI: 10.1038/s43017-024-00571-9
Falk M. Oraschewski
Falk Oraschewski describes how phase-sensitive radio echo sounding can be used to measure melting at the base of ice shelves and englacial ice crystal orientations.
Falk Oraschewski 介绍了如何利用相位敏感无线电回声探测来测量冰架底部的融化和冰川冰晶的方向。
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引用次数: 0
From academia to a career in programme management 从学术界到计划管理职业生涯
Pub Date : 2024-06-17 DOI: 10.1038/s43017-024-00568-4
Graham Simpkins, Allen Pope
To explore career opportunities outside of academia, Nature Reviews Earth & Environment interviewed Allen Pope about their career path from research scientist to programme director at the U.S. National Science Foundation.
为了探索学术界以外的职业机会,《自然-地球与环境》杂志采访了艾伦-波普,了解他们从研究科学家到美国国家科学基金会项目主任的职业道路。
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引用次数: 0
Sustainable wastewater reuse for agriculture 可持续废水回用于农业
Pub Date : 2024-06-06 DOI: 10.1038/s43017-024-00560-y
Anastasis Christou, Vasiliki G. Beretsou, Iakovos C. Iakovides, Popi Karaolia, Costas Michael, Tarik Benmarhnia, Benny Chefetz, Erica Donner, Bernd Manfred Gawlik, Yunho Lee, Teik Thye Lim, Lian Lundy, Roberta Maffettone, Luigi Rizzo, Edward Topp, Despo Fatta-Kassinos
Effective management of water resources is crucial for global food security and sustainable development. In this Review, we explore the potential benefits and challenges associated with treated wastewater (TW) reuse for irrigation. Currently, 400 km3 yr−1 of wastewater is generated globally, but <20% is treated, and of that TW, only 2–15% is reused for irrigation depending on region. The main limitation of TW for irrigation is the inability of current treatment technologies to completely remove all micropollutants and contaminants of emerging concern, some of which have unknown impacts on crops, environment and health. However, advanced water treatment and reuse schemes, supported by water quality monitoring and regulations, can provide a stable water supply for agricultural production, as demonstrated in regions such as the USA and Israel. Such schemes could potentially serve a net energy source, as the embedded energy in wastewater exceeds treatment needs by 9 to 10 times. Agriculturally useful nutrients such as nitrogen, phosphorus and potassium could be also recovered and reused. TW reuse for irrigation could act as a major contributor to a circular economy and sustainable development, but the first steps will be funding and implementation of advanced and sustainable treatment technologies and social acceptance. Treated wastewater (TW) reuse for irrigation could alleviate water imbalances and boost food production in water-scarce regions, thus promoting global food and water security. This Review discusses the potential and challenges of widespread TW reuse for agriculture in a circular economy framework.
有效管理水资源对于全球粮食安全和可持续发展至关重要。在本综述中,我们探讨了经处理的废水(TW)回用于灌溉的潜在效益和挑战。目前,全球每年产生 400 千立方米废水,但其中 20% 经过处理,根据地区不同,只有 2-15% 的废水回用于灌溉。废水用于灌溉的主要限制因素是目前的处理技术无法完全去除所有微污染物和新出现的污染物,其中一些对作物、环境和健康的影响尚不清楚。然而,先进的水处理和回用方案在水质监测和法规的支持下,可以为农业生产提供稳定的水供应,这在美国和以色列等地区得到了验证。由于废水中蕴含的能量超过处理需求的 9 到 10 倍,因此这些计划有可能成为净能源。氮、磷和钾等对农业有用的营养物质也可以回收和再利用。经处理的废水回用于灌溉可为循环经济和可持续发展做出重大贡献,但首先需要为先进的可持续处理技术提供资金并加以实施,同时还需要得到社会的认可。经处理的废水(TW)回用于灌溉可缓解缺水地区的水资源失衡问题,提高粮食产量,从而促进全球粮食和水资源安全。本综述讨论了在循环经济框架下将废水广泛回用于农业的潜力和挑战。
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引用次数: 0
Building resilience in Asian mega-deltas 建设亚洲特大三角洲的抗灾能力
Pub Date : 2024-06-04 DOI: 10.1038/s43017-024-00561-x
Faith Ka Shun Chan, Amelie Paszkowski, Zilin Wang, Xiaohui Lu, Gordon Mitchell, Duc Dung Tran, Jeroen Warner, Jianfeng Li, Yongqin David Chen, Nan Li, Indrajit Pal, James Griffiths, Jiannan Chen, Wei-Qiang Chen, Yong-Guan Zhu
The five Asian mega-deltas (the Yangtze, the Pearl, the Chao Phraya, the Mekong and the Ganges–Brahmaputra–Meghna deltas) are home to approximately 80% of the global deltaic population and the region experiences 90% of global flood exposure. In this Review, we investigate the similarities and differences between the Asian mega-deltas to identify transferable lessons to improve climate resilience. The deltas are increasingly threatened by coastal flooding, saline intrusion and erosion caused by climate change and human activities such as groundwater extraction and dam construction. Owing to differences in the stages of their development, various resilience measures have been implemented. For example, the Ganges–Brahmaputra–Meghna and Mekong deltas use strategic delta plans to identify risk hotspots and guide decision-making. These deltas also increase resilience at a community level by supporting communities to diversify their livelihoods to respond to changing risks and land conditions. Meanwhile, the Yangtze and Pearl deltas have developed forecasting and sensing technologies to allow them to prepare for and respond to hazards effectively. The Asian mega-deltas should learn from one another to integrate effective resilience plans across regional, delta and community levels. Future cross-delta collaborations and knowledge transfer, for example through the formation of a Regional Delta Resilience Alliance, could help to achieve long-term sustainable delta management. Climate change and human activities are increasing the exposure of deltaic communities to natural hazards. This Review discusses lessons that the Asian mega-deltas can share to develop long-term resilience strategies.
亚洲五大三角洲(长江三角洲、珠江三角洲、湄南河三角洲、湄公河三角洲和恒河-布拉马普特拉河-孟加拉河三角洲)居住着全球约 80% 的三角洲人口,该地区遭受了全球 90% 的洪灾。在本综述中,我们研究了亚洲特大三角洲之间的异同,以找出可借鉴的经验教训,提高气候抵御能力。由于气候变化以及地下水开采和大坝建设等人类活动,三角洲正日益受到沿海洪水、盐水入侵和侵蚀的威胁。由于其发展阶段不同,已经实施了各种抗灾措施。例如,恒河-rahmaputra-Meghna 三角洲和湄公河三角洲利用战略三角洲计划来确定风险热点并指导决策。这些三角洲还通过支持社区实现生计多样化来应对不断变化的风险和土地条件,从而提高社区一级的抗灾能力。与此同时,长江三角洲和珠江三角洲开发了预报和传感技术,使其能够有效应对灾害。亚洲特大三角洲应相互学习,在区域、三角洲和社区层面整合有效的抗灾计划。未来的跨三角洲合作和知识转让,例如通过成立区域三角洲抗灾联盟,将有助于实现长期可持续的三角洲管理。
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引用次数: 0
Economic quantification of Loss and Damage funding needs 损失和损害资金需求的经济量化
Pub Date : 2024-06-03 DOI: 10.1038/s43017-024-00565-7
Massimo Tavoni, Pietro Andreoni, Matteo Calcaterra, Elisa Calliari, Teresa Deubelli-Hwang, Reinhard Mechler, Stefan Hochrainer-Stigler, Leonie Wenz
A loss and damage (L&D) fund has been established to support particularly vulnerable developing countries. L&D funding needs, entitlements and necessary contributions can be quantified using climate economics coupled with historical responsibility principles; for the year 2025, total L&D funding needs are estimated to be US $395 [128–937] billion.
为支持特别脆弱的发展中国家,设立了损失和损害(L&D)基金。可以利用气候经济学和历史责任原则对损失和损害基金的资金需求、应享权利和必要捐款进行量化;估计 2025 年损失和损害基金的资金需求总额为 3,950 亿美元[1,28-9,37]。
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引用次数: 0
Fire effects on geomorphic processes 火灾对地貌过程的影响
Pub Date : 2024-05-30 DOI: 10.1038/s43017-024-00557-7
Luke A. McGuire, Brian A. Ebel, Francis K. Rengers, Diana C. S. Vieira, Petter Nyman
Fire-induced geomorphic changes, such as enhanced erosion and debris-flow activity, are expected to increase with climate change owing to increases in fire activity and rainfall intensification. In this Review, we summarize how landscape attributes, rainfall and burn severity influence post-fire geomorphic responses over a range of temporal and spatial scales. Sub-hourly rainfall intensity and burn severity control the magnitude of many post-fire geomorphic process rates through their influence on ground cover and rainfall-runoff partitioning. Post-fire debris flows (PFDFs) make a substantial contribution to the post-fire sediment cascade, transporting sediment from hillslopes to channels, adjacent floodplains and alluvial fans. By the late twenty-first century, PFDF activity is estimated to increase in 68% of areas in which PFDFs have occurred in the past and decrease in only 2% of locations. Once altered by fire, geomorphic state variables — such as infiltration capacity, canopy cover, ground cover and sediment availability — can recover to their pre-fire value or be shifted to a new value. Improved understanding of the factors that influence these post-fire trajectories could support targeted management and intervention strategies. Additionally, monitoring that extends beyond the first 1–3 years after fire and deeper integration of ecohydrological processes into geomorphic models are needed to improve forecasts of post-fire geomorphic responses. Fire can increase the rates of geomorphic processes leading to rapid landscape change and sediment-related hazards. This Review outlines the factors and processes that influence the magnitude, temporal persistence and extent of fire-induced geomorphic changes.
由于火灾活动增加和降雨加剧,预计火灾引起的地貌变化(如侵蚀和泥石流活动增强)将随着气候变化而加剧。在本综述中,我们总结了景观属性、降雨量和燃烧严重程度如何在一系列时间和空间尺度上影响火灾后的地貌响应。亚小时降雨强度和燃烧严重程度通过对地面覆盖和降雨-径流分区的影响,控制着许多火后地貌过程速率的大小。火灾后的泥石流(PFDFs)对火灾后的沉积物级联做出了重大贡献,将沉积物从山坡运送到河道、邻近的洪泛平原和冲积扇。据估计,到二十一世纪末,在过去曾发生过 PFDF 的地区中,有 68% 的地区 PFDF 活动会增加,只有 2% 的地区会减少。地貌状态变量(如渗透能力、树冠覆盖率、地面覆盖率和沉积物可用性)一旦被火灾改变,就会恢复到火灾前的值,或转变为新的值。更好地了解影响这些火灾后轨迹的因素可以支持有针对性的管理和干预策略。此外,需要在火灾发生后的最初 1-3 年进行监测,并将生态水文过程更深入地纳入地貌模型,以改进对火灾后地貌反应的预测。
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引用次数: 0
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Nature Reviews Earth & Environment
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