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The effects of urban land cover dynamics on urban heat Island intensity and temporal trends

机译：城市土地覆盖动力学对城市热岛强度和颞型趋势的影响

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摘要

Assessments of surface urban heat island (UHI) have focused on using remote sensing and land cover data to quantify UHI intensity and spatial distribution within a certain time period by including land cover information. In this study, we implemented a prototype approach to characterize the spatiotemporal variations of UHI using time series of Landsat land surface temperature products and annual land change information. We analyzed UHI distribution and change in Sioux Falls, South Dakota, in the north-central United States and found that the mean UHI intensity in the region was as large as 2.2 degrees C during the period 1986-2017 with an increasing trend of 0.02 degrees C per year within the area with a 5-km non-urban extent. The UHI intensity associated with high intensity urban land cover usually is stronger than with low intensity urban land cover. We evaluated the impact of different non-urban reference extents on UHI variation using different non-urban buffers. The result also suggests that the overall temporal trends of UHI intensity are almost the same when using a 5-km or 10-km non-urban buffer surrounding the urban core. The prototype approach provides a framework to consistently quantify UHI and monitor its change to a large geographic extent.
机译：表面城市热岛（UHI）的评估专注于使用遥感和陆地覆盖数据来量化UHI强度和空间分布，通过包括土地覆盖信息。在这项研究中，我们实施了一种原型方法，以表征使用Landsat陆地温度产品和年度土地变更信息的时间序列的UHI时空变化。我们分析了南达科他州南达科他州南达科他州的UHI分布和变化，发现该地区的平均UHI强度在1986 - 2017年期间在2.2摄氏度下，趋势越来越大为0.02度C每年在该地区内，非城市范围为5公里。与高强度城市陆地覆盖相关的UHI强度通常比低强度城市陆地覆盖更强大。我们评估了不同非城市参考范围对使用不同非城市缓冲区的UHI变异的影响。结果还表明，在城市核心周围的5公里或10公里的非城市缓冲区时，UHI强度的整体时间趋势几乎相同。原型方法提供了一个框架，以一致地量化UHI，并监控其变化到大量地理范围。

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