University of L'Aquila, Department of Civil, Construction-Architectural and Environmental Engineering, Italy.
University of L'Aquila, Department of Life, Health and Environmental Sciences, Italy.
Sci Total Environ. 2019 Feb 10;650(Pt 2):1740-1751. doi: 10.1016/j.scitotenv.2018.09.331. Epub 2018 Sep 26.
Sealed surfaces greatly influence Urban Heat Island (UHI) effects. In this respect, both the composition and spatial patterns of anthropogenic land use play an important role in local thermal pattern. The urban environments' climate change adaptation strategy needs adequate knowledge systems urban planners can use to organise and design more resistant and resilient urban spaces. This study examined the relationship between Land Surface Temperature (LST) variations and increasing urbanised areas during the period 2001-2011 in the Po Valley, utilising different urban growth spatial patterns (UGSP). Remotely sensed LST data was obtained from MODIS (MODerate Resolution Imaging Spectroradiometer) at a resolution of 1 km/pixel for an 11 year-period, from 2001 to 2011, with urbanisation data from the ISTAT map (nominal scale 1:10,000) respectively for the 2001 and 2011 time sections. The relationship between dependent (mean annual daytime, nighttime and daily values) and independent (urbanised areas) variables were investigated through ANOVA test and post-hoc analysis (p < 0.01) for all defined UGSP. Results showed that there is a decreasing LST range (in all conditions) associated with progressive increase of urbanised areas. Furthermore, clustered patterns urban growth have a statistically significant relationship with daytime, nighttime and daily conditions while dispersed pattern urban growth have the same with nighttime only. The outcomes are helpful for understanding the effects of different UGSP, which have significant implications for urban planning, and identifying the critical territorial sectors in need of sustainable mitigation actions.
封闭表面极大地影响城市热岛（UHI）效应。在这方面，人为土地利用的组成和空间模式都对局部热模式起着重要作用。城市环境的气候变化适应战略需要有足够的知识系统，城市规划者可以利用这些系统来组织和设计更具抵抗力和弹性的城市空间。本研究利用不同的城市增长空间模式（UGSP），考察了 2001-2011 年波河谷地区地表温度（LST）变化与不断增加的城市化地区之间的关系。在 11 年的时间内（2001 年至 2011 年），使用来自 MODIS（中分辨率成像光谱仪）的 1km/pixel 分辨率的遥感 LST 数据，使用分别用于 2001 年和 2011 年时间段的 ISTAT 地图（标称比例 1:10000）的城市化数据。通过方差分析测试和事后分析（p<0.01）研究了依赖变量（年均白天、夜间和日值）和独立变量（城市化地区）之间的关系，对所有定义的 UGSP 均进行了分析。结果表明，随着城市化地区的不断增加，存在一个逐渐减小的 LST 范围（在所有条件下）。此外，聚类模式的城市增长与白天、夜间和日条件具有统计学上的显著关系，而分散模式的城市增长仅与夜间条件具有显著关系。这些结果有助于理解不同 UGSP 的影响，这对城市规划具有重要意义，并确定需要可持续缓解措施的关键地区。
