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地球科学进展  2017, Vol. 32 Issue (2): 187-198    DOI: 10.11867/j.issn.1001-8166.2017.02.0187
研究论文     
长三角城市群表面城市热岛日内逐时变化规律
方迎波1, 占文凤1, 2, *, 黄帆1, 高伦1, 全金玲3, 邹照旭1
1.南京大学 江苏省地理信息技术重点实验室/国际地球系统科学研究所,江苏 南京 210023;
2.江苏省地理信息资源开发与利用协同创新中心,江苏 南京 210023;
3.中国科学院地理科学与资源研究所 资源与环境信息系统国家重点实验室,北京 100101
Hourly Variation of Surface Urban Heat Island over the Yangtze River Delta Urban Agglomeration
Fang Yingbo1, Zhan Wenfeng1, 2, *, Huang Fan1, Gao Lun1, Quan Jinling3, Zou Zhaoxu1
1.Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, International Institute for Earth System Science, Nanjing University, Nanjing 210023,China;
2.Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023,China;
3.State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101,China
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摘要:

表面城市热岛多时间尺度变化的遥感研究已取得了阶段性进展。然而,受限于热红外遥感模型与数据的不足,目前典型城市群表面城市热岛的日内逐时变化规律仍不清楚。以MODIS (Moderate-resolution Imaging Spectrometer)遥感影像为主要数据源,结合地表温度日内变化INA08模型,率先模拟并分析了长三角城市群在夏、冬两季的表面城市热岛空间格局与热岛强度的逐时变化特征。结果表明:在夏季,日内所有城市整体而言均呈现热岛效应,但由于城市植被或水体的降温作用,白天至上半夜(08:00~21:00)部分城市存在相对“冷点”,而这些“冷点”在21:00之后基本消失。此季节内城市热岛强度与地表温度日内逐时变化规律相似,两者均在上午迅速上升,并于12:00~14:00到达峰值,而后逐渐下降,并持续至次日日出前。在冬季,多数城市在白天出现了“城市冷岛”,但“冷岛”多在午后至傍晚(14:00~17:00)消失,此后所有城市均恢复为“热岛”。此季节内城市热岛强度与地表温度日内逐时变化规律区别较大,且以农田和森林为背景计算的城市热岛强度的逐时变化趋势存在明显差异,前者在日内到达峰值的时间(约18:00)显著晚于后者(约13:30)。

关键词: 表面城市热岛日内尺度MODIS逐时变化长三角城市群    
Abstract:

Great progress has been made on the remote investigation of Surface Urban Heat Island (SUHI) across multiple time scales. However, limited by the remote sensing models and resolution tradeoff of satellite-derived Land Surface Temperatures (LSTs), currently the hourly regimes of SUHI over typical urban agglomerations in typical seasons remain unclear. Using MODIS imageries as the main data source as well as by incorporating a diurnal temperature cycle model (i.e., INA08), this study, to our knowledge, firstly examined the hourly variations of the spatial pattern and intensity of the SUHIs for the Yangtze River Delta urban agglomeration in both the summer and winter. The results demonstrated that, in the summer, a general trend of ‘heat island’ was observed for every city during a diurnal cycle. ‘Cold spots’ also occur within most of the cities from around 08:00 to 21:00, mostly as a result of the cooling effect of urban vegetation or water body under strong solar insolation. However, these ‘cold spots’ disappear after 21:00. For this season, the hourly variations of the SUHI intensity are similar to those of the LSTs: They both rise rapidly in the morning, reach the maxima at around 12:00 to 14:00, then gradually decrease and continue until the sunrise of the next day. In the winter, surface urban cool islands (SUCIs) were observed for most of the cities, but these SUCIs mostly disappear during the afternoon to the early evening (around 14:00~17: 00), and then all the cities bounce back to exhibit heat islands. Within this season, the hourly variations of the SUHI intensity differ from those of the LST. There also exist large differences of the hourly variations of SUHI intensity between using the rural area and forest as the non-urban background for estimation of the intensity, with the former reaching its maximum (around 18:00) significantly later than the latter reaching its maximum (around 13:30).

Key words: Hourly variation    Moderate Resolution Imaging Spectroradiometer (MODIS).    Surface urban heat island    Yangtze River Delta urban agglomeration    Diurnal scale
收稿日期: 2016-11-20 出版日期: 2017-02-20
ZTFLH:  P467  
通讯作者: 占文凤(1986-),男,江西新余人,副教授,主要从事热红外遥感与城市热环境遥感研究.E-mail:zhanwenfeng@nju.edu.cn   
作者简介: 方迎波(1991-),男,河南商丘人,硕士研究生,主要从事城市热岛遥感研究.E-mail:fang.yingbo@foxmail.com
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引用本文:

方迎波, 占文凤, 黄帆, 高伦, 全金玲, 邹照旭. 长三角城市群表面城市热岛日内逐时变化规律[J]. 地球科学进展, 2017, 32(2): 187-198.

Fang Yingbo, Zhan Wenfeng, Huang Fan, Gao Lun, Quan Jinling, Zou Zhaoxu. Hourly Variation of Surface Urban Heat Island over the Yangtze River Delta Urban Agglomeration. Advances in Earth Science, 2017, 32(2): 187-198.

链接本文:

http://www.adearth.ac.cn/CN/10.11867/j.issn.1001-8166.2017.02.0187        http://www.adearth.ac.cn/CN/Y2017/V32/I2/187

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