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Unprecedented Hot Extremes Observed in city clusters in China during Summer 2022

Journal of Meteorological Research 2023年第2期37卷 141-148页

作者： Yufeng YUAN Zhen LIAO Baiquan ZHOU Panmao ZHAI Key Laboratory of Meteorological Disaster of Ministry of Education Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science&TechnologyNanjing210044 State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesChina Meteorological AdministrationBeijing100081

We report here extreme daytime and nighttime temperatures,severe heatwaves,and compound hot events recorded in China's five most densely populated city clusters in summer *** records were set,with daytime maximum temperatures>42℃in cities along the Yangtze River valley and extreme nighttime temperatures>30℃.Widespread prolonged heatwaves lasting for>40 days and compound hot days occurring for>32 consecutive days were experienced in these city *** explore the possible causes of these extreme events,we analyzed the linkages between the changes in the mean temperatures and hot extremes for different-sized cities in the city *** found that megacities(e.g.,Beijing,Shanghai,Guangzhou,etc.)and large cities(e.g.,Baoding,Wuxi,Foshan,etc.),especially those located in central and eastern China,experienced unprecedented extreme high temperatures,not only in the daytime but also at *** observed large increases in the mean temperatures and more frequent and more intense hot extremes in cities affected by both the background global warming and intensified *** and large cities experienced higher and more frequent extreme temperatures and greater warming trends than medium-and small-sized cities(e.g.,Zhangjiakou,Zhenjiang,Yaan,etc.).The evidence of the dependence of temperature trends on a city's size shows that intensified heat island effects may increase the threat of hot extremes in cities undergoing rapid urbanization.

关键词： China city clusters hot extremes summer 2022

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Comprehensive Measurement for Carrying Capacity of Resources and Environment of city clusters in Central China

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Chinese Geographical Science 2010年第3期20卷 281-288页

作者： FANG Chuanglin LIU Xiaoli Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101 China The Administration Centre of Urban-Rural Planning Ministry of House & Urban-Rural Development of P. R. China Beijing 100835 China

Studying the carrying capacity of resources and environment of city clusters in the central China has important practical guidance significance for promoting the healthy, sustainable and stable development of this region. According to their influencing factors and reciprocity mechanism, using system dynamics approaches, this paper built a SD model for measuring the carrying capacity of resources and environment of the city clusters in the central China, and through setting different development models, the comprehensive measurement analysis on the carrying capacity was carried out. The results show that the model of promoting socio-economic development under the protection of resources and environment is the optimal model for promoting the harmony development of resources, environment, society and economy in the city clusters. According to this model, the optimum population scale of the city clusters in 2020 is 42.80×106 persons, and the moderate economic development scale is 22.055×1012 yuan (RMB). In 1996-2020, the carrying capacity of resources and environment in the city clusters took on obvious phase-change characteristics. During the studied period, it is basically at the initial development stage, and will come through the development process from slow development to speedup development.

关键词： carrying capacity of resources and environment comprehensive measurement city clusters central China

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Measurement of city clusters' Economic Growth Effects and Analysis of the Influencing Factors

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Chinese Journal of Urban and Environmental Studies 2020年第1期8卷 111-131页

作者： HAN Jing GAO Ming SUN Yawen School of Economics and Resource Management Beijing Normal University

Based on the panel data of 202 prefecture-level cities within 14 national-level city clusters in China from 2007 to 2016, we established a dynamic panel model to measure the economic growth effects of city clusters and analyzed the main influencing factors. The results show that:(i) Technology has a significant impact on the economic growth of city clusters; the narrowing development gap between regions can help city clusters produce good economic growth effects;the city clusters, if more agglomerated, can help better utilize factors, and thus promote coordinated regional development.(ii) city clusters with multiple central cities boast a stronger engine of economic growth, and the impacts of factors such as technology and clustering degree on their economic growth are more noticeable.(iii) Geographical factors will also affect city clusters’ economic growth. The economic growth of city clusters in Southern China has been more strongly powered by the factors such as technology, clustering degree and human capital than those in Northern China. From the spatial perspective and by using the threshold panel method,we further explored the mechanisms with which the central cities within a city cluster can influence economic growth depending on their accessibility. The results manifest that the more accessible the central cities within a city cluster are, the stronger role they can play in leading and driving the economic growth of surrounding areas. In the future, it is important to promote the transformation of single-core and dual-core city clusters into multi-core city clusters, and give full play to the role of central cities in leading the development of surrounding areas. It is also necessary to vigorously develop technology and transportation to further facilitate the high-quality growth of city clusters.

关键词： city clusters economic growth effects influencing factors central cities’ accessibility

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数字经济对我国区域发展格局的影响

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区域与城市经济 2024年第1期

作者：王娟娟李玲宋雪倩

数字经济在我国经济总量中的权重日益加大，数据的生产要素性在产业发展中不断得到论证。由于产业布局、经济基础的差异，数据要素在区域经济发展中的贡献差距较大。借助熵值法、主成分分析法和全局空间自相关分析，运用两套指标体系分... 详细信息

数字经济在我国经济总量中的权重日益加大，数据的生产要素性在产业发展中不断得到论证。由于产业布局、经济基础的差异，数据要素在区域经济发展中的贡献差距较大。借助熵值法、主成分分析法和全局空间自相关分析，运用两套指标体系分别测度2008—2013年、2013年—2020年的数据要素对区域经济发展水平的影响，研究结果表明：数据要素介入前后支撑我国区域经济增长的要素发生了较大变化，但是阻碍因素变化较小；各地区把握数字经济发展机遇的敏锐性与经济发展基础呈现正相关关系；东部地区、核心城市在区域发展格局中的权重进一步加大；城市群中心化格局正在取代四大区域板块分布格局成为我国区域发展格局的主导。

关键词：数字经济数据要素区域经济区域发展格局城市群 digital economy data factors regional economy regional development pattern city clusters

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Utilizing the information resources to promote the development of Jing-Jin-Ji region urban cluster

Utilizing the information resources to promote the developme...

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The Sixth Forum of Collaborative Development among Bohai-Rim,Circum-Capital and Beijing-Tianjin-Hebei

作者： Bi liuhe,Wuhan University of Technology,Ph.D.Students MKC filled in Hebei province and the chairman of the company Zhaobiao,Graduate Student in Hebei University of Technology Sun Lijie,Graduate Student of Hebei University of Technology

Urbanization is the inevitable result of the development of human society,Urban cluster development is inevitable choice that the city economy,population,social development to a certain ***,the city’s development is inseparable from the development and utilization of information resources and the high speeding *** country 1025 planning made the Jing-Jin-Ji metropolis circle collaborative development planning *** paper is intended to in this background research how to efficient use of information resources to promote Jing-Jin-Ji metropolis cluster’s fast development.

关键词： Information resources city clusters Collaborative development Circulation Radiation effects

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Beijing,Tianjin and Hebei city cluster development and government coordination

Beijing,Tianjin and Hebei City cluster development and gover...

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The Sixth Forum of Collaborative Development among Bohai-Rim,Circum-Capital and Beijing-Tianjin-Hebei

作者： Geng Jianming,A Doctor of Wuhan University of Technology Feng Yanying,Graduate Student of Hebei University of Technology

This paper first discusses some related theories,for example,the city cluster theory,the government’s operation ***,it describes the necessity of government coordination in the urban cluster development among Beijing,Tianjin and *** analysis of the effect of government coordination in Beijing,Tianjin and Hebei in the development of the urban cluster,Beijing,Tianjin and Hebei city cluster development is impossible if it left the government coordination,but the government coordination is not everything,it also will run into a lot of difficulties and obstacles in the process of *** this paper concludes part,author propose the solutions to solve the problem which are met in coordination government process.

关键词： city clusters the functions of the government the government coordination externality

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通过行政区管理体制改革促进城市群结构优化

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公共行政 2016年第2期

作者：黄彬

城市群是中国推进新型城镇化的主要形态，但行政区划制约了城市群结构优化，因此探讨如何调整行政区管理体制，对促进城市群的形成与发展具有重要意义。文章以长江三角洲城市群为例，提出通过区域事务分类管理的行政管理体制改革促进城... 详细信息

城市群是中国推进新型城镇化的主要形态，但行政区划制约了城市群结构优化，因此探讨如何调整行政区管理体制，对促进城市群的形成与发展具有重要意义。文章以长江三角洲城市群为例，提出通过区域事务分类管理的行政管理体制改革促进城市群城镇体系结构、产业结构、交通及信息网络结构和公共服务体系结构优化。

关键词：城市群结构优化行政管理体制长江三角洲 city clusters structural improvement reform of the administrative management system Yangtze River Delta

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国内贸易大循环：基于区域和城市群视角的考察

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贸易经济 2021年第5期

作者：范剑勇叶菁文

不同区域与城市群在国内贸易大循环中发挥着不同的作用。研究发现，三大区域发挥的功能具有差异性，东部区域是国内贸易中心，中部区域对东部、西部区域的经济发展提供基础原材料支持，西部区域则更多肩负着国家战略使命(保障重要原材... 详细信息

不同区域与城市群在国内贸易大循环中发挥着不同的作用。研究发现，三大区域发挥的功能具有差异性，东部区域是国内贸易中心，中部区域对东部、西部区域的经济发展提供基础原材料支持，西部区域则更多肩负着国家战略使命(保障重要原材料供应)。城市群对于国内贸易总量、所处区域贸易总量贡献较大，是区域贸易背后的主要推手。同时，区域之间、城市群之间的贸易联系较弱。为此，应将城市群作为政策发力对象，着力提高城市群发展质量，优化贸易结构，提升国内大循环畅通水平。

关键词：国内大循环国内贸易区域城市群 domestic circulation domestic trade regions city clusters

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