Journal of Arid Meteorology ›› 2023, Vol. 41 ›› Issue (3): 403-412.DOI: 10.11755/j.issn.1006-7639(2023)-03-0403

• Articles • Previous Articles     Next Articles

Analysis of spatial-temporal variation of urban heat island and driving mechanism in Zhengzhou in recent 17 years

ZHANG Yuchen1,2(), TIAN Hongwei1,2()   

  1. 1. Key Laboratory of Agrometeorological Safeguard and Applied Technique, CMA, Zhengzhou 450003, China
    2. Institute of Meteorological Sciences of Henan Province, Zhengzhou 450003, China
  • Received:2021-12-16 Revised:2022-12-06 Online:2023-06-30 Published:2023-07-02
  • Contact: TIAN Hongwei

近17 a郑州城市热岛时空演变及驱动机制分析

张渝晨1,2(), 田宏伟1,2()   

  1. 1.中国气象局·河南省农业气象保障与应用技术重点开放实验室,河南 郑州 450003
    2.河南省气象科学研究所,河南 郑州 450003
  • 通讯作者: 田宏伟
  • 作者简介:张渝晨(1994—),女,硕士,工程师,主要从事农业与生态气象研究。E-mail: zhangyc_1994@163.com
  • 基金资助:
    中国气象局农业气象保障与应用技术重点开放实验室开放研究基金项目(AMF201903);河南省农业气象保障与应用技术重点实验室应用技术研究基金项目(KM202125);河南省农业气象保障与应用技术重点实验室应用技术研究基金项目(KM202325)

Abstract:

In order to make an in-depth study of urban thermal environment of Zhengzhou, the temporal evolution and spatial distribution characteristics of urban heat island effect are analyzed based on the MODIS land surface temperature product (MYD21A1), and the causes and driving mechanism of urban heat island effect are discussed from both natural and anthropogenic factors in combination with the data of land use/land cover types and Zhengzhou statistical yearbooks. The results show that there is no significant difference in the spatial distribution of annual mean heat island intensity between day and night in Zhengzhou, and the areas with stronger heat island intensity or above are mainly in the main urban area. The temporal variation of heat island effect in Zhengzhou has diurnal and seasonal differences. During the daytime, the proportion of heat island area increased insignificantly in spring and significantly in summer, and decreased insignificantly in autumn and winter. In spring, summer and autumn, the proportion of heat island area at night increased insignificantly, while in winter, the heat island effect was weak and there was no obvious change characteristics. The inter-annual variation of urban heat island proportion index of Zhengzhou was consistent with heat island intensity. The urban heat island proportion index during daytime and nighttime was higher in summer, then in spring, autumn and winter in turn. The heat island effect of different land use/land cover types was obviously different, with the highest in urban and rural building land, followed by cultivated land, and the lowest in woodland and water area. There is a negative correlation between vegetation coverage and land surface temperature. Solar radiation intensity has a positive driving effect on urban heat island effect, and population density, GDP and built-up area are all positively correlated with urban land surface temperature.

Key words: urban heat island effect, spatial-temporal variation, driving factor

摘要:

为深入探讨郑州市热环境问题,基于长时间序列的 MODIS(Moderate Resolution Imaging Spectroradiometer)陆表温度产品(MYD21A1),分析郑州城市热岛效应的时间演变和空间分布特征,并结合土地利用/覆盖类型数据及郑州市统计年鉴资料,从自然和人为两方面因素探讨郑州市热岛效应的成因和驱动机制。结果表明:郑州市年平均热岛强度的昼、夜空间分布差异不大,较强及以上热岛区域主要在主城区。郑州市热岛效应具有昼、夜和季节差异。日间,春季和夏季的热岛面积占比分别呈非显著和显著上升趋势,秋季和冬季呈非显著下降趋势;夜间,春、夏、秋季热岛面积均呈非显著上升趋势,冬季热岛效应偏弱,无明显变化特征。郑州市城市热岛比例指数与热岛强度的年际变化特征一致,昼、夜城市热岛比例指数均为夏季>春季>秋季>冬季。不同土地利用/覆盖类型的热岛效应差异明显,城乡建筑用地最高、耕地次之、林地和水域最低;植被覆盖度与地表温度呈负相关,太阳辐射强度对城市热岛效应有正向驱动作用,人口密度、城市生产总值和建筑竣工面积均与城市地表温度呈正相关。

关键词: 城市热岛效应, 时空变化, 驱动因子

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