{"title":"研究二维和三维城市结构在季节性地表辐射预算中的作用","authors":"","doi":"10.1016/j.buildenv.2024.112148","DOIUrl":null,"url":null,"abstract":"<div><div>Surface net radiation (SNR), a cornerstone in the intricate energy balance of urban climate systems, has garnered significant attention in research. While past endeavors have illuminated the effects of two-dimensional urban configurations on SNR, a conspicuous void persists in elucidating the nuanced interplay between three-dimensional (3D) urban features — encompassing building heights, volumes, and floor area ratios—and their modulation of SNR in urban landscapes. Addressing this gap, our research introduced a bespoke physical inversion approach, refined for high-resolution (30m) seasonal SNR assessment in urban areas, leveraging Landsat 8 imagery and meteorological datasets. We delved deeper into the seasonal dynamics of SNR influenced by 3D urban structures, leveraging the potent XGBoost regression algorithm and SHAP model. Our case study, centered on Beijing's primary urban region, underscores the inversion method's efficacy, with deviations from <em>In-situ</em> measured SNR values amounting to 10.21 W/m<sup>2</sup> in spring, 8.43 W/m<sup>2</sup> in summer, 11.55 W/m<sup>2</sup> in autumn, and 9.14 W/m<sup>2</sup> in winter. This precision was also reflected in an impressive R<sup>2</sup> value of 0.81 and a standard deviation of 23.90 W/m<sup>2</sup> compared with existing literature benchmarks. Seasonally, SNR peaked during summer, averaging 642.12 W/m<sup>2</sup>, followed by spring (590.08 W/m<sup>2</sup>), autumn (333.75 W/m<sup>2</sup>), and winter (275.93 W/m<sup>2</sup>). Water bodies exhibited the highest SNR throughout, peaking at 809.25 W/m<sup>2</sup> in summer, whereas bare land registered the lowest, averaging 494.58 W/m<sup>2</sup>. Intriguingly, buildings with an average height below 15m significantly mitigated heat gain in summer, while a diverse mix of taller buildings exceeding 23m enhanced energy retention in winter, fostering a warming effect. By uncovering the intricate links between 3D urban structures and SNR, our findings inform strategic interventions that can effectively harness or mitigate SNR, contributing to more resilient and livable cities.</div></div>","PeriodicalId":9273,"journal":{"name":"Building and Environment","volume":null,"pages":null},"PeriodicalIF":7.1000,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Investigating the role of two-dimensional and three-dimensional urban structures in seasonal surface radiation budget\",\"authors\":\"\",\"doi\":\"10.1016/j.buildenv.2024.112148\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Surface net radiation (SNR), a cornerstone in the intricate energy balance of urban climate systems, has garnered significant attention in research. While past endeavors have illuminated the effects of two-dimensional urban configurations on SNR, a conspicuous void persists in elucidating the nuanced interplay between three-dimensional (3D) urban features — encompassing building heights, volumes, and floor area ratios—and their modulation of SNR in urban landscapes. Addressing this gap, our research introduced a bespoke physical inversion approach, refined for high-resolution (30m) seasonal SNR assessment in urban areas, leveraging Landsat 8 imagery and meteorological datasets. We delved deeper into the seasonal dynamics of SNR influenced by 3D urban structures, leveraging the potent XGBoost regression algorithm and SHAP model. Our case study, centered on Beijing's primary urban region, underscores the inversion method's efficacy, with deviations from <em>In-situ</em> measured SNR values amounting to 10.21 W/m<sup>2</sup> in spring, 8.43 W/m<sup>2</sup> in summer, 11.55 W/m<sup>2</sup> in autumn, and 9.14 W/m<sup>2</sup> in winter. This precision was also reflected in an impressive R<sup>2</sup> value of 0.81 and a standard deviation of 23.90 W/m<sup>2</sup> compared with existing literature benchmarks. Seasonally, SNR peaked during summer, averaging 642.12 W/m<sup>2</sup>, followed by spring (590.08 W/m<sup>2</sup>), autumn (333.75 W/m<sup>2</sup>), and winter (275.93 W/m<sup>2</sup>). Water bodies exhibited the highest SNR throughout, peaking at 809.25 W/m<sup>2</sup> in summer, whereas bare land registered the lowest, averaging 494.58 W/m<sup>2</sup>. Intriguingly, buildings with an average height below 15m significantly mitigated heat gain in summer, while a diverse mix of taller buildings exceeding 23m enhanced energy retention in winter, fostering a warming effect. By uncovering the intricate links between 3D urban structures and SNR, our findings inform strategic interventions that can effectively harness or mitigate SNR, contributing to more resilient and livable cities.</div></div>\",\"PeriodicalId\":9273,\"journal\":{\"name\":\"Building and Environment\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":7.1000,\"publicationDate\":\"2024-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Building and Environment\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0360132324009909\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CONSTRUCTION & BUILDING TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Building and Environment","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0360132324009909","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
Investigating the role of two-dimensional and three-dimensional urban structures in seasonal surface radiation budget
Surface net radiation (SNR), a cornerstone in the intricate energy balance of urban climate systems, has garnered significant attention in research. While past endeavors have illuminated the effects of two-dimensional urban configurations on SNR, a conspicuous void persists in elucidating the nuanced interplay between three-dimensional (3D) urban features — encompassing building heights, volumes, and floor area ratios—and their modulation of SNR in urban landscapes. Addressing this gap, our research introduced a bespoke physical inversion approach, refined for high-resolution (30m) seasonal SNR assessment in urban areas, leveraging Landsat 8 imagery and meteorological datasets. We delved deeper into the seasonal dynamics of SNR influenced by 3D urban structures, leveraging the potent XGBoost regression algorithm and SHAP model. Our case study, centered on Beijing's primary urban region, underscores the inversion method's efficacy, with deviations from In-situ measured SNR values amounting to 10.21 W/m2 in spring, 8.43 W/m2 in summer, 11.55 W/m2 in autumn, and 9.14 W/m2 in winter. This precision was also reflected in an impressive R2 value of 0.81 and a standard deviation of 23.90 W/m2 compared with existing literature benchmarks. Seasonally, SNR peaked during summer, averaging 642.12 W/m2, followed by spring (590.08 W/m2), autumn (333.75 W/m2), and winter (275.93 W/m2). Water bodies exhibited the highest SNR throughout, peaking at 809.25 W/m2 in summer, whereas bare land registered the lowest, averaging 494.58 W/m2. Intriguingly, buildings with an average height below 15m significantly mitigated heat gain in summer, while a diverse mix of taller buildings exceeding 23m enhanced energy retention in winter, fostering a warming effect. By uncovering the intricate links between 3D urban structures and SNR, our findings inform strategic interventions that can effectively harness or mitigate SNR, contributing to more resilient and livable cities.
期刊介绍:
Building and Environment, an international journal, is dedicated to publishing original research papers, comprehensive review articles, editorials, and short communications in the fields of building science, urban physics, and human interaction with the indoor and outdoor built environment. The journal emphasizes innovative technologies and knowledge verified through measurement and analysis. It covers environmental performance across various spatial scales, from cities and communities to buildings and systems, fostering collaborative, multi-disciplinary research with broader significance.