| 程璟媛1，2，张友水1，2*.福州市亚像元不透水面对地表温度影响变化分析[J].海南师范大学学报自科版,2018,31(4):448-457 |
| 福州市亚像元不透水面对地表温度影响变化分析 |
| Impacts of Subpixel Impervious Surface onLand Surface Temperature Variation in Fuzhou, China |
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| DOI：10.12051/j.issn.1674-4942.2018.04.016 |
| 中文关键词: 地表温度 线性光谱解混 贡献率指数 景观指数 福州市 |
| 英文关键词: land surface temperature linear spectral unmixing analysis contribution index landscape metrics Fuzhou city |
| 基金项目:福建省自然科学基金项目（2018J01739）；福建省公益类科研院所专项（2019R1102） |
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| 中文摘要: |
| 基于Landsat 影像，利用全约束最小二乘法混合像元分解的方法，获取福州中心城区不
透水面覆盖度信息，利用同期高分辨率影像面积对比法验证分解结果。根据不透水面覆盖度大小
进行分级以表示城市发展程度，采用亚像元状态转移矩阵分析2000 年至2016 年各等级不透水面
区域面积的变化，利用景观指数对城市不同发展程度区域斑块分布变化情况进行分析。结合地表
温度归一化方法，计算各级不透水面区域的温度贡献率，并对比城市不同发展程度区域分布对城
市热岛效应的影响。结果表明，福州城市化进程主要集中于不透水面覆盖度在30% ~ 60%的区域
内，城市发展程度不同的区域相互参杂分布于中心城区内；不透水面覆盖度大于50%的区域促进城
市热岛效应的产生，随着斑块破碎化程度的增加，加剧热岛效应产生。研究结果可为缓解城市发
展过程中的热岛效应提供参考。 |
| 英文摘要: |
| Estimating the spatial distribution of urban land use patterns is important for analyzing urban heat island（UHI）
effect. Impervious surface areas（ISAs）are more stable and not affected by seasonal changes, which are increasingly used to
analyze UHI effect. With the development of Fuzhou, more and more vegetation in urban are replaced by ISAs, whichlead to
rising land surface temperature（LST）. Based on the Landsat image, the full-constrained linear spectral decomposition meth⁃
od was used to obtain the coverage information of ISA in Fuzhou city. The decomposition results were verified using the
high-resolution image area comparison method in the same period. ISA coverage information was used to classify different ur⁃
ban development areas. Sub-pixel state transfer matrix was used to analyze the area of ISA at each level of the two-phase im⁃
age. The landscape index was applied to different urbanization levels in the study area. Block distribution changes were ana⁃
lyzed. Combined with the LST normalization method, the temperature contribution rates of the ISA at various levels were cal⁃
culated, and the impact of urban development on the UHI effect was compared. The analysis results show that the urbaniza⁃
tion process in Fuzhou is mainly concentrated in the area with impervious surface coverage of 30%～60%, and areas with
different degrees of urbanization are mixed in the built-up area; ISA coverage is greater than 50% area and that promotes the
UHI effect. As the degree of fragmentation increases, the heat island effect will increase. The research results can provide a
reference for the city to mitigate the heat island effect during the season replacement and development. |
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