Nature Cities最新文献_第4页

The decreasing housing utilization efficiency in China’s cities

Nature Cities Pub Date : 2025-01-02 DOI: 10.1038/s44284-024-00177-8

Lifeng Shi, Tobias Leichtle, Xianjin Huang, Michael Wurm, Hannes Taubenböck

{"title":"The decreasing housing utilization efficiency in China’s cities","authors":"Lifeng Shi, Tobias Leichtle, Xianjin Huang, Michael Wurm, Hannes Taubenböck","doi":"10.1038/s44284-024-00177-8","DOIUrl":"10.1038/s44284-024-00177-8","url":null,"abstract":"‘Ghost cities’ are a well-known phenomenon of (almost) complete vacancy of urban living space in China. Underutilization of urban living space, however, is far more common than complete vacancy. Here we propose the concept of housing utilization efficiency (HUE) and present the following findings: (1) the overall HUE in China’s highly urbanized areas decreased from 84% in 2010 to 78% in 2020, (2) the HUE in central, old urban areas was generally lower than that in the outer layers of urban areas and declined more from 2010 to 2020 and (3) four development types are found to represent different patterns of urban population movement, urban housing growth and HUE change at the intraurban level. These findings provide comprehensive insight into the discrepancies between urban housing supply and demand in China and highlight their connections to the country’s particular urbanization characteristics and policies, which are crucial for future housing development and planning. This study proposes a new concept, housing utilization efficiency (HUE), to assess urban housing supply and demand. It found that the overall HUE in China has decreased since 2010, coupled with an over-supply of housing in most cities and processes of depopulation in others.","PeriodicalId":501700,"journal":{"name":"Nature Cities","volume":"2 1","pages":"70-80"},"PeriodicalIF":0.0,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s44284-024-00177-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Urban food delivery services as extreme heat adaptation

Nature Cities Pub Date : 2025-01-02 DOI: 10.1038/s44284-024-00172-z

Yunke Zhang, Daoping Wang, Yu Liu, Kerui Du, Peng Lu, Pan He, Yong Li

{"title":"Urban food delivery services as extreme heat adaptation","authors":"Yunke Zhang, Daoping Wang, Yu Liu, Kerui Du, Peng Lu, Pan He, Yong Li","doi":"10.1038/s44284-024-00172-z","DOIUrl":"10.1038/s44284-024-00172-z","url":null,"abstract":"More frequent global extreme heat events prompt behavioral adaptations, such as reducing outdoor activities to relieve potential distress. The emergence of innovative daily life services in cities offers new avenues for implementing such adaptive strategies. Here we investigate whether urban residents augment food delivery consumption as an immediate response to hot weather in China. Analyzing extensive food delivery service data across 100 Chinese cities from 2017 to 2023, we observe a significant surge in lunchtime orders, exceeding 12.6%, as temperatures escalate from 20 °C to 35 °C, and reaching 21.4% at 40 °C. These increments, coupled with reduced heat exposure via food delivery services, are more pronounced among female, high-income and older individuals, signifying varying degrees of benefit among consumers. We further reveal the transfer of heat exposure from consumers to delivery riders, highlighting the gains and pains introduced by food delivery services and the need for policy intervention. The quantification and findings in this study provide unique insights for the design of efficient policies promoting extreme heat adaptation and ensuring social equity while fighting climate change. Food delivery services in cities offer avenues for urban residents to adjust their behavior in response to extreme heat events. Analysis of food delivery data from 100 Chinese cities between 2017 and 2023 revealed a surge in lunchtime orders during temperature spikes and showcased varying benefits of reduced heat exposure across different consumer demographic groups.","PeriodicalId":501700,"journal":{"name":"Nature Cities","volume":"2 2","pages":"170-179"},"PeriodicalIF":0.0,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143555234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unequal roles of cities in the intercity healthcare system 城市在城际医疗系统中的不平等作用

Nature Cities Pub Date : 2025-01-02 DOI: 10.1038/s44284-024-00185-8

Pengjun Zhao, Juan Li, Mengzhu Zhang

{"title":"Unequal roles of cities in the intercity healthcare system","authors":"Pengjun Zhao, Juan Li, Mengzhu Zhang","doi":"10.1038/s44284-024-00185-8","DOIUrl":"10.1038/s44284-024-00185-8","url":null,"abstract":"Cities are increasingly interdependent regarding healthcare provision and demand. However, the intercity healthcare system (IHS) behind the nationwide patient mobility remains insufficiently understood. Here, leveraging human mobility big data, we reveal cities’ roles in providing and demanding quality healthcare within the IHS of China. We find that 8% of Chinese cities are national and regional hubs that address the healthcare shortage of cities deprived of quality healthcare, while 63% of the cities that are unnoticed compensate for migrant workers being denied healthcare rights in megacities. The IHS generates new structural inequalities in healthcare access exhibiting a Matthew effect. The few cities (12%) that are already rich in healthcare resources benefit more and can strengthen their advantages in providing healthcare to local populations (32% of China’s total population). The many cities (35%), while facing healthcare shortages, are further disadvantaged in ensuring adequate healthcare for their local populations (26% of China’s total population). This study used cell phone data to estimate patient mobility, defined as individuals seeking healthcare in cities other than their city of residence, in China. It found that the three types of patient mobility interweave to form an intercity healthcare system and produce new structural inequalities in local quality healthcare provision among cities.","PeriodicalId":501700,"journal":{"name":"Nature Cities","volume":"2 3","pages":"198-209"},"PeriodicalIF":0.0,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s44284-024-00185-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Urban inequality, the housing crisis and deteriorating water access in US cities 美国城市中的不平等、住房危机和日益恶化的用水状况

Nature Cities Pub Date : 2024-12-19 DOI: 10.1038/s44284-024-00180-z

Katie Meehan, Jason R. Jurjevich, Lucy Everitt, Nicholas M.J.W. Chun, Justin Sherrill

{"title":"Urban inequality, the housing crisis and deteriorating water access in US cities","authors":"Katie Meehan, Jason R. Jurjevich, Lucy Everitt, Nicholas M.J.W. Chun, Justin Sherrill","doi":"10.1038/s44284-024-00180-z","DOIUrl":"10.1038/s44284-024-00180-z","url":null,"abstract":"The housing unaffordability and cost-of-living crisis is affecting millions of people in US cities, yet the implications for urban dwellers’ well-being and social reproduction remain less clear. This Article presents a longitudinal analysis of household access to running water—a vital component of social infrastructure—in the 50 largest US cities since 1970. The results indicate that water access has worsened in an increasing number and typology of US cities since the 2008 global financial crash, disproportionately affecting households of color in 12 of the 15 largest cities. We provide evidence to suggest that a ‘reproductive squeeze’—systemic, compounding pressures on households’ capacity to reproduce themselves on a daily and societal basis—is forcing urban households into more precarious living arrangements, including housing without running water. We analyze the case study of Portland (Oregon) to illustrate the racialized nature of the reproductive squeeze under a housing crisis. Our insights reveal that plumbing poverty—a lack of household running water—is expanding in scope and severity to a broader array of US cities, raising doubts about equitable progress towards Sustainable Development Goals for clean water and sanitation for all (SDG 6) and sustainable cities (SDG 11) in an increasingly urbanized United States. Meehan and colleagues study access to running water in large US cities since 1970, finding that the 2008 financial crisis worsened household ‘plumbing poverty’ in many cities. This disproportionately impacted households of color and generally squeezed lower-income households into more precarious living situations.","PeriodicalId":501700,"journal":{"name":"Nature Cities","volume":"2 1","pages":"93-103"},"PeriodicalIF":0.0,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s44284-024-00180-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Response and sensitivity of urban plants with different seed dispersal modes 不同种子传播方式的城市植物的反应和敏感性

Nature Cities Pub Date : 2024-12-11 DOI: 10.1038/s44284-024-00169-8

Zhiwen Gao, Yingji Pan, Kun Song, Yanyi Yang, Mingming Zhuge, Tian Wu, Tiyuan Xia, Yuandong Hu, Liangjun Da, Ellen Cieraad

{"title":"Response and sensitivity of urban plants with different seed dispersal modes","authors":"Zhiwen Gao, Yingji Pan, Kun Song, Yanyi Yang, Mingming Zhuge, Tian Wu, Tiyuan Xia, Yuandong Hu, Liangjun Da, Ellen Cieraad","doi":"10.1038/s44284-024-00169-8","DOIUrl":"10.1038/s44284-024-00169-8","url":null,"abstract":"Spontaneous plants, those not planted by people or remaining from before urbanization, are vital to urban biodiversity. Their distribution in urban systems is affected by seed dispersal mode and environmental factors such as natural dispersal limitation and habitat quality factors. We assessed four seed dispersal modes in 16 cities in Yunnan province, the most biodiverse province in China. Autochory, in which plants eject seeds or otherwise power their seeds’ dispersal, was the dominant seed dispersal mode of urban spontaneous plants in most cities (13 out of 16), whereas hydrochory, or passive seed dispersal by water, was the least frequent. Our research showed spontaneous plants in urban ecosystems adopt convergent strategies to address environmental stressors. The number of urban plants was significantly higher in colder and more-humid climates but decreased with increased dispersal limitations and reduced habitat quality. Sensitivities to these factors varied, with autochory especially sensitive to dispersal limitation and hydrochory sensitive to habitat quality and climate. Findings suggest improving habitat quality and creating green corridors would enhance conservation efforts for urban biodiversity. Plants are vital to healthy cities, yet urban environments filter the plant traits we find. This study assesses the relative dominance of different seed dispersal modes among plants that establish in cities without human intent, finding that many disperse their own seeds and that seed dispersal by water is less common.","PeriodicalId":501700,"journal":{"name":"Nature Cities","volume":"2 1","pages":"28-37"},"PeriodicalIF":0.0,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Domestic migration and city rank dynamics

Nature Cities Pub Date : 2024-12-10 DOI: 10.1038/s44284-024-00170-1

Sandro M. Reia, P. Suresh C. Rao, Marc Barthelemy, Satish V. Ukkusuri

引用次数: 0

Cities incorporate equity in their climate policies but overlook procedural justice in decision-making 城市将公平纳入气候政策，却忽视了决策中的程序正义

Nature Cities Pub Date : 2024-12-09 DOI: 10.1038/s44284-024-00167-w

Mahir Yazar, Håvard Haarstad, Johan Elfving

{"title":"Cities incorporate equity in their climate policies but overlook procedural justice in decision-making","authors":"Mahir Yazar, Håvard Haarstad, Johan Elfving","doi":"10.1038/s44284-024-00167-w","DOIUrl":"10.1038/s44284-024-00167-w","url":null,"abstract":"Increasingly, urban scholars and decision-makers are emphasizing the integration of justice into urban policy. Yet, there is limited research on if or how cities incorporate procedural justice (fairness, equality and inclusion) in urban governance. Here, we demonstrate that less than half of the C40 cities with climate action plans lean toward including procedural justice in policy choices and the related measures. We find that cities adopting the C40-driven equity pledge, those joining the C40 later and cities in the Global South positively correlate with the integration of procedural justice. Cities that substantially engage in procedural justice demonstrate fairness in decision-making processes through visible collaboration and clear plans. In contrast, cities lacking engagement with procedural justice focus primarily on the fairness of outcomes without addressing deeper systemic issues or involving marginalized groups, leading to what we label as tokenistic modes of participation. Cities must move beyond normative policy prescription and instead use concrete organizational tools to circumvent historical legacies of injustice. Yazar and coauthors investigate the incorporation of procedural justice—fair and inclusive decision-making processes—among the climate-ambitious cities in the C40 network. They find that less than half of C40 cities emphasize procedural justice in climate planning, thereby limiting their ability to meaningfully address systemic inequality.","PeriodicalId":501700,"journal":{"name":"Nature Cities","volume":"2 1","pages":"17-27"},"PeriodicalIF":0.0,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

From heat racism and heat gentrification to urban heat justice in the USA and Europe

Nature Cities Pub Date : 2024-12-05 DOI: 10.1038/s44284-024-00179-6

Isabelle Anguelovski, Panagiota Kotsila, Loretta Lees, Margarita Triguero-Mas, Amalia Calderón-Argelich

引用次数: 0

From local to global and in between, urban context counts 从地方到全球，以及两者之间，城市环境都很重要

Nature Cities Pub Date : 2024-12-02 DOI: 10.1038/s44284-024-00182-x

引用次数: 0

Untapped capacity of place-based peer-to-peer resource sharing for community resilience

Nature Cities Pub Date : 2024-12-02 DOI: 10.1038/s44284-024-00175-w

Zhengyang Li, Katherine Idziorek, Anthony Chen, Cynthia Chen

{"title":"Untapped capacity of place-based peer-to-peer resource sharing for community resilience","authors":"Zhengyang Li, Katherine Idziorek, Anthony Chen, Cynthia Chen","doi":"10.1038/s44284-024-00175-w","DOIUrl":"10.1038/s44284-024-00175-w","url":null,"abstract":"During and after a disaster, people share resources with family, friends and neighbors to tide them over difficult times. The conventional top-down approach for disaster relief overlooks the wealth of critical resources that exist within communities. Here we explicitly model place-based peer-to-peer (P2P) resource sharing and evaluate its impact on community resilience to disasters. Using data from two urban communities in Seattle, Washington State, we confirm substantial untapped capacity for enhanced community resilience through place-based P2P resource sharing. Under a 5-day isolation scenario, place-based P2P sharing can reduce a community’s resilience loss by 13.4–100%; on average, 22–44 social ties per household support an 80% sharing rate of surplus resources. These findings suggest that place-based P2P sharing could be a viable strategy for disaster response across US communities, in addition to the current, government-led effort. Our methodological framework is transferable to other urban communities interested in enhancing disaster resilience. Using two socioeconomically different neighborhoods in Seattle, this study shows that place-based peer-to-peer resource sharing can substantially improve community resilience in both types of neighborhoods. Strong ties were about 1.5–3 times as effective as weak ties, and the neighborhood with lower socioeconomic status (SES) required more ties to achieve an optimal sharing rate than the neighborhood with higher SES.","PeriodicalId":501700,"journal":{"name":"Nature Cities","volume":"2 1","pages":"47-57"},"PeriodicalIF":0.0,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0