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Arguments for building The Circle and not The Line in Saudi Arabia 关于在沙特阿拉伯建立“圆圈”而非“线”的争论
Q1 ENVIRONMENTAL STUDIES Pub Date : 2023-06-19 DOI: 10.1038/s42949-023-00115-y
Rafael Prieto-Curiel, Dániel Kondor
Saudi Arabia plans to construct a new city, home to 9 million people. The most relevant aspect is its form, a line with a surprising length of 170 km. We analyse whether this is the best plan for a new city and some inconveniences of the prolonged urban form.
沙特阿拉伯计划建造一座容纳 900 万人的新城市。最重要的是它的形式,一条长达 170 公里的线路令人吃惊。我们将分析这是否是建设新城的最佳方案,以及这种漫长的城市形态会带来的一些不便。
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引用次数: 2
Explicit and tacit knowledge have diverging urban growth patterns 显性知识和隐性知识在城市增长模式上存在差异
Q1 ENVIRONMENTAL STUDIES Pub Date : 2023-06-15 DOI: 10.1038/s42949-023-00116-x
Linzhuo Li, Nannan Zhao
This article utilizes an online job recruitment dataset of more than 4.6 million jobs in China to examine the urban scaling patterns of explicit and tacit knowledge. Knowledge complexity is considered essential for economic development and innovation, and recent studies find complex economic activities of many fields concentrate more in large cities. However, it remains unclear whether the urban concentration tendency would differ by explicit and tacit knowledge, given the latter is often argued as the hard core knowledge more difficult to transfer. We measure explicit/tacit knowledge in job descriptions regarding education/experience requirements. Our analysis reveals that knowledge of different natures differs to a great extent in their property of urban concentration. Specifically, jobs requiring greater explicit knowledge show higher urban scaling rates. This, however, is not true for tacit knowledge, as it demonstrates the exact opposite pattern. Our findings suggest that while cities are centers of knowledge and innovation, the engines of continued growth tend to become more biased towards explicit rather than know-how knowledge.
本文利用中国超过 460 万个职位的在线招聘数据集,研究显性知识和隐性知识的城市扩展模式。知识的复杂性被认为是经济发展和创新的必要条件,最近的研究发现,许多领域的复杂经济活动更多地集中在大城市。然而,鉴于显性知识和隐性知识通常被认为是更难转移的核心知识,城市集聚趋势是否会因显性知识和隐性知识的不同而不同,这一点仍不清楚。我们对职位描述中有关教育/经验要求的显性/隐性知识进行了衡量。我们的分析表明,不同性质的知识在城市集中度方面存在很大差异。具体来说,需要更多显性知识的工作显示出更高的城市扩展率。然而,隐性知识的情况却并非如此,因为它表现出完全相反的模式。我们的研究结果表明,虽然城市是知识和创新的中心,但持续增长的引擎却更倾向于显性知识而非隐性知识。
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引用次数: 0
Diverse types of coupling trends in urban tree and nontree vegetation associated with urbanization levels 与城市化水平相关的城市树木和非树木植被的不同类型耦合趋势
Q1 ENVIRONMENTAL STUDIES Pub Date : 2023-06-14 DOI: 10.1038/s42949-023-00111-2
Song Leng, Ranhao Sun, Xiaojun Yang, Mingxin Jin, Liding Chen
Cities are increasingly recognizing the benefits of incorporating urban greening strategies into their planning and design to improve sustainability and livability. However, the specific contribution of tree versus nontree vegetation has not been adequately studied in the context of urban greening and rapid urbanization. In this study, we investigated the spatiotemporal variations of urban tree and nontree coverage in China during 2000–2020 by using satellite observations. Results show the nationwide mean urban tree coverage increased by 0.073 ± 0.511% per year (mean ± 1 standard deviation), while nontree vegetation coverage decreased by 0.584 ± 1.022% per year. We found that the majority of mega- and large cities had a contrasting vegetation pattern, with significantly ascending trends in both tree and nontree coverages in urban core areas but descending trends in peri-urban areas. These trends were positively associated with multiple greenness indices, suggesting the importance of the vegetation structure for growth and productivity in urban areas. This study highlights the predominance of enhancing vegetation growth in urban areas primarily driven by significantly increasing tree cover in China, and can further serve as a reference for global vegetation study.
越来越多的城市认识到,将城市绿化战略纳入规划和设计有利于提高可持续性和宜居性。然而,在城市绿化和快速城市化的背景下,树木与非树木植被的具体贡献尚未得到充分研究。在本研究中,我们利用卫星观测数据研究了 2000-2020 年间中国城市树木和非树木覆盖率的时空变化。结果表明,全国城市树木覆盖率平均每年增加 0.073 ± 0.511%(平均 ± 1 个标准差),而非树木植被覆盖率每年减少 0.584 ± 1.022%。我们发现,大多数特大城市和大城市的植被模式截然不同,在城市核心区,树木和非树木植被覆盖率均呈显著上升趋势,而在城市周边地区则呈下降趋势。这些趋势与多种绿化指数呈正相关,表明植被结构对城市地区的增长和生产力非常重要。这项研究强调了中国城市地区植被增长主要受树木覆盖率显著增加的驱动,可为全球植被研究提供参考。
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引用次数: 0
Integration of urban science and urban climate adaptation research: opportunities to advance climate action 城市科学与城市气候适应研究的结合:推动气候行动的机会。
Q1 ENVIRONMENTAL STUDIES Pub Date : 2023-06-10 DOI: 10.1038/s42949-023-00113-0
José Lobo, Rimjhim M. Aggarwal, Marina Alberti, Melissa Allen-Dumas, Luís M. A. Bettencourt, Christopher Boone, Christa Brelsford, Vanesa Castán Broto, Hallie Eakin, Sharmistha Bagchi-Sen, Sara Meerow, Celine D’Cruz, Aromar Revi, Debra C. Roberts, Michael E. Smith, Abigail York, Tao Lin, Xuemei Bai, William Solecki, Diane Pataki, Luís Bojorquez Tapia, Marcy Rockman, Marc Wolfram, Peter Schlosser, Nicolas Gauthier
There is a growing recognition that responding to climate change necessitates urban adaptation. We sketch a transdisciplinary research effort, arguing that actionable research on urban adaptation needs to recognize the nature of cities as social networks embedded in physical space. Given the pace, scale and socioeconomic outcomes of urbanization in the Global South, the specificities and history of its cities must be central to the study of how well-known agglomeration effects can facilitate adaptation. The proposed effort calls for the co-creation of knowledge involving scientists and stakeholders, especially those historically excluded from the design and implementation of urban development policies.
人们越来越认识到,应对气候变化需要城市适应。我们概述了一项跨学科的研究工作,认为关于城市适应的可行研究需要认识到城市作为嵌入物理空间的社会网络的本质。鉴于全球南方城市化的速度、规模和社会经济成果,其城市的特殊性和历史必须成为研究众所周知的集聚效应如何促进适应的核心。拟议的努力呼吁科学家和利益相关者共同创造知识,特别是那些历史上被排除在城市发展政策设计和实施之外的人。
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引用次数: 0
Characteristics of urban park recreation and health during early COVID-19 by on-site survey in Beijing 新冠肺炎早期北京城市公园休闲与健康的现场调查特征。
Q1 ENVIRONMENTAL STUDIES Pub Date : 2023-06-06 DOI: 10.1038/s42949-023-00110-3
Lei Cao, Yan Sun, Angela Beckmann-Wübbelt, Somidh Saha
The positive health effects of green space have received increasing attention, however, on-site surveys and city-level research to reveal the relationship between urban park recreation and urbanite health in metropolitan areas during a post-pandemic period are lacking. We conducted an on-site survey using a questionnaire with 225 respondents from 22 urban parks distributed across the metropolitan area of Beijing during the early COVID-19 eased period with another 1346 respondents in 2021 to make verification. We identified factors that could influence public perceptions of park quality and human health (i.e., physical, mental, and social health) and revealed gender differences in perceptions of park characteristics. The correspondence pattern of perceived urban park quality with social health is distinct from that of physical and mental health. Due to the strict social distancing policy in early COVID-19 period, urban parks in different levels of urbanization environment could exert varied health effects.
绿色空间对健康的积极影响越来越受到关注,然而,缺乏现场调查和城市层面的研究来揭示疫情后大都市地区城市公园娱乐与城市居民健康之间的关系。在新冠肺炎缓解初期,我们对分布在北京大都会区的22个城市公园的225名受访者进行了现场调查,2021年另有1346名受访者进行核实。我们确定了可能影响公众对公园质量和人类健康(即身体、心理和社会健康)看法的因素,并揭示了对公园特征看法的性别差异。城市公园感知质量与社会健康的对应模式不同于身心健康。由于新冠肺炎早期严格的社交距离政策,不同城市化环境水平的城市公园可能会产生不同的健康影响。
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引用次数: 0
Assessing social contracts for urban adaptation through social listening on Twitter 通过Twitter上的社会倾听评估城市适应的社会契约。
Q1 ENVIRONMENTAL STUDIES Pub Date : 2023-06-05 DOI: 10.1038/s42949-023-00108-x
Deepal Doshi, Matthias Garschagen
Adapting to climate change impacts requires a coherent social contract in which different actors agree on a clear distribution of roles and responsibilities. An urgent requirement is to understand the imagined social contracts on expected roles and responsibilities, which is particularly relevant in cities where very diverse social groups come together. However, there is limited empirical evidence on these expectations as they are often tacit and hard to capture across large populations and heterogeneous groups. Here we assess the social contract on flood risk management in Mumbai, using the concept of social listening in combination with Twitter data. We find wide gaps between and within imagined social contracts. Sentiments such as frustration and apathy expressed in tweets explain these gaps and highlight the need to build trust for achieving accepted and effective social contracts for adaptation. Theoretical, empirical, and methodological lessons can be transferred to other cities and beyond.
适应气候变化的影响需要一个连贯的社会契约,在这个契约中,不同的行动者就明确的角色和责任分配达成一致。一个紧迫的要求是理解想象中的关于预期角色和责任的社会契约,这在不同社会群体聚集在一起的城市中尤其重要。然而,关于这些期望的经验证据有限,因为它们往往是隐性的,很难在大量人群和异质群体中捕捉到。在这里,我们将社会倾听的概念与推特数据相结合,评估孟买洪水风险管理的社会契约。我们发现想象中的社会契约之间和内部存在着巨大的差距。推文中表达的沮丧和冷漠等情绪解释了这些差距,并强调了建立信任以实现公认和有效的适应社会契约的必要性。理论、经验和方法的教训可以转移到其他城市和其他地方。
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引用次数: 0
What are the lessons from COVID-19 for creating healthy, sustainable, resilient future cities? 新冠肺炎给创建健康、可持续、有韧性的未来城市带来了什么教训?
Q1 ENVIRONMENTAL STUDIES Pub Date : 2023-06-02 DOI: 10.1038/s42949-023-00107-y
Billie Giles-Corti, Sarah Foster, Bella Lynch, Melanie Lowe
The COVID-19 pandemic has disrupted lives and the economy, reminding the global community of the devastating health and economic impacts of uncontrolled infectious disease. It has affected how and where people live, work, shop, and play, and exposed our cities’ vulnerabilities, leading to calls for a health lens to be applied in designing, approving, and evaluating city plans. Socioeconomic, spatial and health inequities have been amplified, particularly for those living in inadequate or poorly designed housing, neighbourhoods, and cities. Hence, city mayors have committed to ‘build back better’ with all daily living amenities within a 15-min walking or cycling trip. Designed well, these cities have the potential to be healthier, more sustainable, equitable, and resilient. Yet their delivery requires a rethink of city planning. Drawing on lessons from the COVID-19 pandemic, we argue that to reduce the risk of future pandemics, we must mitigate climate change, limit urban expansion, and use nature-based solutions to protect natural habitats and biodiversity. We then explore how healthy, sustainable, and resilient 15-minute cities could be planned to reduce emissions and ensure our cities are more resilient in the event of future crises. Given that higher density housing underpins the success of 15-minute cities, we also examine how to create more resilient housing stock, through well-implemented health-supportive apartment design standards. Finally, we argue that to achieve all this, cross-sector leadership and investment will be vital.
新冠肺炎疫情扰乱了人们的生活和经济,提醒全球社会不受控制的传染病对健康和经济的破坏性影响。它影响了人们的生活、工作、购物和娱乐方式和地点,暴露了我们城市的脆弱性,导致人们呼吁在设计、批准和评估城市规划时应用健康视角。社会经济、空间和健康方面的不平等现象加剧了,尤其是对于那些生活在住房、社区和城市不足或设计不良的人来说。因此,市长们承诺在步行或骑自行车15分钟内“重建得更好”,提供所有日常生活设施。这些城市设计良好,有可能变得更健康、更可持续、更公平、更有韧性。然而,它们的交付需要重新思考城市规划。借鉴新冠肺炎大流行的经验教训,我们认为,为了降低未来大流行的风险,我们必须缓解气候变化,限制城市扩张,并使用基于自然的解决方案来保护自然栖息地和生物多样性。然后,我们探索如何规划健康、可持续和有韧性的15分钟城市,以减少排放,并确保我们的城市在未来发生危机时更有韧性。鉴于更高密度的住房是15分钟城市成功的基础,我们还研究了如何通过实施良好的健康支持型公寓设计标准来创造更具弹性的住房存量。最后,我们认为,要实现这一切,跨部门领导和投资至关重要。
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引用次数: 2
How circular economy and digital technologies can support the building sector to cope with its worldwide environmental challenge? 循环经济和数字技术如何支持建筑业应对其全球环境挑战?
Q1 ENVIRONMENTAL STUDIES Pub Date : 2023-05-29 DOI: 10.1038/s42949-023-00109-w
Jacqueline Cramer
The building sector can address pressing environmental problems by leveraging two major trends: circular economy and digital technologies. Circular building practices emphasize restorative design principles, which can significantly reduce the amount of virgin material used and the environmental footprint of buildings. When combined with digital technologies, circular practices can achieve even higher environmental benefits. Such technologies enable visualization of the environmental impact along the entire value chain, facilitating smart design, production, and use to increase material- and eco-efficiency. However, realizing the full potential of these trends requires more than just technological advancements. Institutional, behavioral, and socio-economic system changes are essential to effect a transition towards a circular and digital economy. To facilitate such a transition, a new form of governance is needed, in which network governance complements conventional public governance. Network governance fosters the formation of coalitions of willing partners that jointly strive towards the goal of system change, creating a fertile ground for a new economic paradigm, behavioral change, government regulation and innovation. The effectiveness of network governance in supporting public governance depends on the specific socio-cultural and political context of a country. However, a thoughtful application of this governance model can facilitate the building sector’s journey towards greater material- and environmental efficiency.
建筑行业可以利用循环经济和数字技术这两大趋势来解决紧迫的环境问题。循环型建筑实践强调恢复性设计原则,可以显著减少原始材料的使用量和建筑对环境的影响。当与数字技术相结合时,循环实践可以实现更高的环境效益。这些技术能够使整个价值链对环境的影响可视化,促进智能设计、生产和使用,从而提高材料和生态效益。然而,要充分发挥这些趋势的潜力,需要的不仅仅是技术进步。体制、行为和社会经济系统的变革对于实现向循环经济和数字经济的转型至关重要。为了促进这种转型,需要一种新的治理形式,其中网络治理是对传统公共治理的补充。网络治理能促进有意愿的合作伙伴结成联盟,共同致力于实现系统变革的目标,为新的经济范式、行为变革、政府监管和创新创造肥沃的土壤。网络治理在支持公共治理方面的有效性取决于一个国家的具体社会文化和政治背景。然而,深思熟虑地应用这种治理模式可以促进建筑部门提高材料和环境效率。
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引用次数: 0
Identifying where nature-based solutions can offer win-wins for carbon mitigation and biodiversity across knowledge systems 确定基于自然的解决方案在哪些方面可以为跨知识系统的碳减排和生物多样性提供双赢
Q1 ENVIRONMENTAL STUDIES Pub Date : 2023-04-18 DOI: 10.1038/s42949-023-00103-2
Christopher M. Raymond, Alex M. Lechner, Minttu Havu, Joel Jalkanen, Jussi Lampinen, Oriol García Antúnez, Anton Stahl Olafsson, Natalie Gulsrud, Antti Kinnunen, Leif Backman, Liisa Kulmala, Leena Järvi
Managing nature-based solutions (NBS) in urban areas for carbon mitigation and biodiversity outcomes is a global policy challenge, yet little is known about how to both assess and weave diverse knowledge systems and values into carbon-biodiversity trade-off assessments. This paper examines the spatial relationships between biophysical and social values for carbon sequestration potential (measured as carbon dioxide, CO2, flux) and biodiversity in Helsinki, Finland, using integrated valuation. The approach combines methods from carbon sequestration modelling, expert scoring approaches to biodiversity assessment and public participation geographic information systems (PPGIS). Results indicate strong spatial associations between biophysical assessment of CO2 flux and biodiversity priorities, and weaker associations between biophysical and social values. Integration of social and biophysical values leads to multiple pathways for protection of NBS to achieve carbon mitigation and biodiversity outcomes, as well as options for the spatial targeting of education and capacity building programs to areas of local concern.
管理城市地区基于自然的解决方案(NBS)以实现碳减排和生物多样性成果是一项全球性的政策挑战,但对于如何评估并将不同的知识体系和价值观融入碳-生物多样性权衡评估中却知之甚少。本文采用综合估值法研究了芬兰赫尔辛基碳固存潜力(以二氧化碳通量衡量)和生物多样性的生物物理价值与社会价值之间的空间关系。该方法结合了碳封存建模、生物多样性评估专家评分法和公众参与地理信息系统(PPGIS)等方法。结果表明,二氧化碳通量的生物物理评估与生物多样性优先事项之间存在较强的空间关联,而生物物理价值与社会价值之间的关联较弱。将社会价值和生物物理价值结合起来,可为保护国家生物多样性战略提供多种途径,以实现碳减排和生物多样性成果,并为教育和能力建设计划在空间上针对当地关注的领域提供选择。
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引用次数: 2
Publisher Correction: A Call for a National Community Resilience Extension Partnership to Bridge Resilience Research to Communities 出版商更正:呼吁建立全国社区抗灾能力推广合作伙伴关系,将抗灾能力研究与社区联系起来
Q1 ENVIRONMENTAL STUDIES Pub Date : 2023-04-12 DOI: 10.1038/s42949-023-00106-z
Christopher T. Clavin, Jennifer Helgeson, Matthew Malecha, Shubha Shrivastava
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引用次数: 0
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