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Spatiotemporal evolution of urban green space and its impact on the urban thermal environment based on remote sensing data: A case study of Fuzhou City, China

机译：基于遥感数据的城市绿地的时空演变及其对城市热环境的影响 - 以福州市为例

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摘要

Taking the main city of Fuzhou as the study area, the relationship between the spatiotemporal evolution of urban green space (UGS) and the urban thermal environment from 1993 to 2013 was investigated using a set of remote sensing images. The evolution of UGS is obvious in the study area, where UGS loss (42.83 km(2)) > UGS extension (4.99 km(2)) > UGS exchange (2.61 km(2)). UGS loss affects forest/grass > water > wetland. Furthermore, the area defined as high temperature zones increased by 23.11 km(2) in 2013, twice as much as that in 1993. However, the influence of UGS on the urban thermal environment differs by type and evolution: water has the greatest cooling effect, followed by wetland and forest/grass, and UGS loss (8.67 degrees C) > UGS exchange (4.00 degrees C) > UGS extension (2.90 degrees C) > UGS unchanged (2.45 degrees C). Finally, the vegetation and cooling index classified the mechanism of temperature response induced by different types of UGS evolution. The evolution of UGS loss usually simulated the movement of the corresponding pixel from the low land surface temperature and high vegetation coverage to the opposite situation. Regression analyses demonstrated that the effect of elevated land surface temperature generated from the reduction of water and forest/grass reached 0.81 degrees C and 0.72 degrees C, respectively, in 20 years, indicating that the loss of a significant amount of UGS during urbanization was the primary influence on the urban thermal environment. This study may provide more useful information for researchers and decision-makers engaged in urban planning, urban regeneration, and sustainable land development, especially focusing on the issues of climate adaption and the urban heat island (UHI) effect mitigation.
机译：采用一套遥感图像调查了城市绿地（UGS）与城市绿地（UGS）的时空演变与城市热环境之间的关系。在研究区域中，UGS的演变是显而易见的，其中UGS损失（42.83公里（2））> UGS延伸（4.99公里（2））> UGS交换（2.61公里（2））。 UGS损失影响森林/草>水>湿地。此外，定义为高温区域的区域在2013年增加了23.11km（2），其两倍于1993年。然而，UGS对城市热环境的影响因类型和进化而不同：水具有最大的冷却效果，其次是湿地和森林/草，UGS损失（8.67摄氏度）> UGS交换（4.00摄氏）> UGS延伸（2.90摄氏度）> UGS不变（2.45℃）。最后，植被和冷却指数分类了不同类型的UGS进化诱导的温度应答机制。 UGS损失的演变通常模拟相应像素从低陆地温度和高植被覆盖的运动到相反的情况。回归分析表明，20年内分别达到0.81摄氏度达到0.81摄氏度和0.72摄氏度的升高的土地表面温度的影响，表明在城市化期间减少了大量UGS对城市热环境的初步影响。本研究可以为从事城市规划，城市再生和可持续土地开发的研究人员和决策者提供更有用的信息，特别是关注气候适应和城市热岛（UHI）影响的问题。

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