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- Bäcklin, Oskar, 1991, et al.
(författare)
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Outdoor heat stress at preschools during an extreme summer in Gothenburg, Sweden - Preschool teachers’ experiences contextualized by radiation modelling
- 2021
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Ingår i: Sustainable Cities and Society. - : Elsevier BV. - 2210-6707. ; 75
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Tidskriftsartikel (refereegranskat)abstract
- Using a mixed-method approach consisting of interviews with preschool teachers and modelling of the outdoor thermal conditions using the mean radiant temperature as an indicator of heat stress, the occurrence of heat stress in Gothenburg preschools during the summer of 2018 and its effects have been studied. One third of 440 preschool yards modelled have more than 50% of the preschool yard-area exposed to strong heat stress during a warm and sunny summer day, implying children in many preschools have considerably less play area than current guidelines deem sufficient. Shade, where present, was mostly from trees within the preschool yards themselves rather from objects in surrounding areas, provided effective heat mitigation. Interviews confirmed that excessive heat conditions at preschool yards resulted in tired, drowsy and overheated children as well as forcing the preschool to prioritise care over pedagogical activities. The results demonstrated that heat stress occurs at Gothenburg preschools, with difficulties in ensuring the well-being of children at many preschools as a consequence. Many preschools need more shade, preferably from trees to provide healthy and secure environments for preschool children. Finally, the study highlights the need for more research on how weather and outdoor environments affect children's activity and well-being.
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| 3. |
- Bäcklin, Oskar, 1991, et al.
(författare)
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Outdoor heat stress at preschools during an extreme summer in Gothenburg, Sweden - Preschool teachers’ experiences contextualized by radiation modelling
- 2022
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Ingår i: Multiple Nordic Geographies 9th Nordic Geographers Meeting 19th - 22nd of June 2022 Joensuu, Finland.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- With increasing urbanisation and climate change, heat stress issues are becoming increasingly important to consider in order to create sustainable urban environments worldwide. Heat affects all groups in society, although small children are especially vulnerable due to physiological factors as well as limitations in their everyday mobility. Therefore, it is crucial to ensure that outdoor areas used by children, such as preschools provide healthy safe thermal conditions. Trees are proven effective heat mitigating objects, as well as highly appreciated features of preschool yards for their aesthetic and pedagogical aspects. However, there is a large variation in the amount of trees at preschool yards which can prove to be problematic regarding thermal comfort and well-being for both children and preschool teachers today and in the future. Using a mixed-method approach consisting of 19 interviews with preschool teachers, and modelling outdoor thermal conditions on 440 preschool yards, the occurrence of heat stress in Gothenburg preschools during the heat wave of 2018 and its effects on preschools has been studied. One third of modelled preschool yards were found to have more than 50% of the preschool yard area exposed to strong heat stress during a warm and sunny summer days, implying children in many preschools have significantly less play area than current guidelines deem sufficient. Shading, which was found mainly provided by trees within preschool yards rather than from objects in surrounding areas, provide effective heat mitigation. Shading devices such as shade-sails were found prone to breakage and not providing sufficient shading. Thus, shading devices are not suggested as a long-term solution for heat mitigation at preschool yards. Interviews confirmed that excessive heat conditions at preschool yards cause tired, drowsy and overheated children as well as forcing the preschool to prioritise care over pedagogical activities. The results demonstrated that heat stress is a problem at many Gothenburg preschools, with difficulties in ensuring the well-being of children at many preschools as a consequence. The strong correlation found between amount of trees at preschool yards and less heat stress highlight the importance of trees for heat mitigation.
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- Bäcklin, Oskar, 1991, et al.
(författare)
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Urban greenery variation between residential typologies: Implications for recreation
- 2024
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Ingår i: Trees, Forests and People. - 2666-7193. ; 16
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Tidskriftsartikel (refereegranskat)abstract
- The importance of greenery for human well-being and recreation in urban areas is well-known. While many studies have examined the recreational importance of large green spaces, parks, and forests, the greenery encountered in our everyday surroundings, particularly in areas near our residences, has not been extensively researched. In this study, we investigated differences in tree canopy coverage, ground- and total amount of greenery among four common Nordic residential typologies, as well as how this greenery is perceived in terms of recreational values by residents. We utilized GIS-analysis and survey data for this investigation. The results revealed significant variations in urban greenery and recreational values between typologies, with modern dense residential areas being much less green and assessed to provide the least recreational values. Furthermore, the results suggest that trees and lawns play crucial roles in shaping residential areas that are pleasant to live in. These findings offer insights into the characteristics and challenges associated with the amount of greenery in various typologies, as well as preferences towards different types of greenery important for creating enjoyable outdoor residential environments. Finally, the results emphasize the importance of fine-scale investigation of greenery in residential areas.
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- Konarska, Janina, 1986, et al.
(författare)
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Surface paving more important than species in determining the physiology, growth and cooling effects of urban trees
- 2023
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Ingår i: Landscape and Urban Planning. - 0169-2046. ; 240
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Tidskriftsartikel (refereegranskat)abstract
- Urban trees provide numerous ecosystem services including the mitigation of urban heat. However, this cooling effect is often restricted due to poor tree growth and health caused by harsh growing conditions. The aim of this study is to analyse the influence of surface paving on the physiology, growth and cooling benefits of street trees of three common species with contrasting drought tolerance (Aesculus hippocastanum, Tilia × europaea and Quercus palustris) in Gothenburg, Sweden. Tree structural parameters, leaf water potentials, gas exchange, leaf area density and chlorophyll content were measured in three summertime periods in 2017 and 2018. Moreover, based on the measured data, the cooling effects of studied trees due to shading and transpiration were modelled. For all species, trees at highly paved sites were found to have significantly reduced growth, physiological performance and cooling effects compared to sites with a higher degree of permeable surfaces. This negative effect of surface paving was stronger than the effect of species, despite differences in drought tolerance and water use strategy between studied species. Based on the sensitivity of species to surface paving, we recommend Q. palustris and T. europaea for sites with good growing conditions due to their potential to maintain high water use and growth rates, and A. hippocastanum for highly paved sites where shading is not the primary ecosystem service sought. Our findings emphasise the importance of tree planting design in supporting urban tree growth and the continuous provision of ecosystem services, particularly in the context of the changing climate.
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