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| DOI | 10.3389/feart.2024.1375827 |
| Mapping urban heatwaves and islands: the reverse effect of Salento's white cities | |
| De Razza, Stefano; Zanetti, Carlo; De Marchi, Massimo; Pappalardo, Salvatore Eugenio | |
| 发表日期 | 2024 |
| EISSN | 2296-6463 |
| 起始页码 | 12 |
| 卷号 | 12 |
| 英文摘要 | Extreme events related to climate change are increasing in intensity, frequency, and duration worldwide. Europe is identified as a heatwave hotspot, with trends three-to-four time faster than the northern mid-latitudes; effects of heatwaves are combined in urban contexts with the heat island phenomenon, making cities critical for climate risk prevention and management. Land surface temperature represents an essential parameter for assessing the intensity of thermal impact on urban ecosystems and on public health. This parameter is widely used to map and assess urban heat islands in light to support climate-resilient adaptation planning. The general aim of this study is to assess urban heat island intensity, during a significant heatwave, in a critical heat-related risk region in Southern Italy (Salento). Specific objectives are 1) assessing climate change trends for heat-related extremes (hot days and heatwaves), 2) calculating urban heat islands intensity at regional and urban scale, 3) assessing spatial relationships among thermal intensity and urban characteristics (soil sealing and surface albedo). Identification of heatwaves is based on climatological data and statistical analyses; spatial thermal analyses and correlations are based on Landsat-8 imagery while land cover data are derived from ortho-photos. Climate analyses show a notable increase of the maximum annual temperature of 0.5 degrees C per decade, with an increase of eight hot days per decade. Spatial analyses on thermal impact highlight that urban heat island intensity is much lower within cities and towns than in rural areas, showing a reverse effect compared to the typical microclimatic characteristics of urban contexts. In fact, thermal intensity in the city of Lecce ranges from -11 degrees C to 5.6 degrees C. Also, by NDVI analyses, we found that permeable surfaces were 2 degrees C higher than impermeable surfaces, with statistically significant differences. Results from albedo analysis suggest that the characteristics of building material in historical sectors of cities may play a crucial role in this reverse effect of urban heat islands. Further studies are required to better investigate the contribution of different factors in this context. |
| 英文关键词 | urban heat islands; climate change; LST; albedo; Landsat-8 |
| 语种 | 英语 |
| WOS研究方向 | Geology |
| WOS类目 | Geosciences, Multidisciplinary |
| WOS记录号 | WOS:001220847100001 |
| 来源期刊 | FRONTIERS IN EARTH SCIENCE
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/287593 |
| 作者单位 | University of Padua; University of Padua; University of Padua |
| 推荐引用方式 GB/T 7714 | De Razza, Stefano,Zanetti, Carlo,De Marchi, Massimo,et al. Mapping urban heatwaves and islands: the reverse effect of Salento's white cities[J],2024,12. |
| APA | De Razza, Stefano,Zanetti, Carlo,De Marchi, Massimo,&Pappalardo, Salvatore Eugenio.(2024).Mapping urban heatwaves and islands: the reverse effect of Salento's white cities.FRONTIERS IN EARTH SCIENCE,12. |
| MLA | De Razza, Stefano,et al."Mapping urban heatwaves and islands: the reverse effect of Salento's white cities".FRONTIERS IN EARTH SCIENCE 12(2024). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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