Urban Green Infrastructure as a tool for urban heat mitigation: Survey of research methodologies and findings across different climatic regions

Saaroni, Hadas; Amorim, Jorge Humberto; Hiemstra, J.A.; Pearlmutter, David

doi:10.1016/j.uclim.2018.02.001

Cited by 194 publications

(97 citation statements)

References 89 publications

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“…The main reason for these circumstances is related to the differences in the SVF from the monitoring sites, as the rural areas considered (RCD) in the vicinity of the city of Bragança are mostly formed by low-rise vegetation, with high SVF, easing the cooling of surfaces, in contrast with the lower SVF found in LCZ GAB. These results are consistent with studies that demonstrate the cooling potential of green spaces [33,[60][61][62][63]. The relatively high UCI registered in the LCZs 2 and 8 are associated with the urban configuration, including shadow cast by buildings and reduced ventilation inside the urban structure.…”

Section: Discussionsupporting

confidence: 91%

Urban Cold and Heat Island in the City of Bragança (Portugal)

Gonçalves

Ornellas

Ribeiro

et al. 2018

Climate

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The thermal environment is an important aspect of the urban environment because it affects the quality of life of urban residents and the energy use in buildings. Urban Heat Island (UHI) and Urban Cold Island (UCI) are complementary effects that are the consequence of cities’ structures interference with the local climate. This article presents results from five years of urban climate monitoring (2012–2016) in a small Portuguese city (Bragança) using a dense meteorological network of 23 locations covering a wide array of Local Climate Zones (LCZ), from urban areas to nearby rural areas. Results show the presence of both the UHI effect, from mid-afternoon until sunrise, and the UCI after sunrise, both being more intense under the dense midrise urban context and during the summer. Urban Green Spaces had an impact on both UHI and UCI, with an important role in cooling areas of the city during daytime in the summer. Other LCZs had less impact on local thermal conditions. Despite the small size of this city, both effects (UHI and UCI) had a relevant intensity with an impact on local climate conditions. Both effects tend to decrease in intensity with increasing wind speed and precipitation.

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Section: Discussionsupporting

confidence: 91%

Urban Cold and Heat Island in the City of Bragança (Portugal)

Gonçalves

Ornellas

Ribeiro

et al. 2018

Climate

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“…In temperate climates this risk is highest during the night time, and mainly indoors (Buchin et al 2016). Among UHI countermeasures, urban green space is considered among the most effective for reducing air temperatures outdoors, but for addressing the indoor hazard it is most effective to apply measures at the building levelhighlighting the fact that NBS must be implemented at a range of scales in order to deliver the optimum benefit (Saaroni et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Enhancing the circular economy with nature-based solutions in the built urban environment: green building materials, systems and sites

Pearlmutter

Theochari

Nehls³

et al. 2019

Blue-Green Systems

108

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The objective of this review paper is to survey the state of the art on nature-based solutions (NBS) in the built environment, which can contribute to a circular economy (CE) and counter the negative impacts of urbanization through the provision of ecosystem services. NBS are discussed here at three different levels: (i) green building materials, including biocomposites with plant-based aggregates; (ii) green building systems, employed for the greening of buildings by incorporating vegetation in their envelope; and (iii) green building sites, emphasizing the value of vegetated open spaces and water-sensitive urban design. After introducing the central concepts of NBS and CE as they are manifested in the built environment, we examine the impacts of urban development and the historical use of materials, systems and sites which can offer solutions to these problems. In the central section of the paper we present a series of case studies illustrating the development and implementation of such solutions in recent years. Finally, in a brief critical analysis we look at the ecosystem services and disservices provided by NBS in the built environment, and examine the policy instruments which can be leveraged to promote them in the most effective manner – facilitating the future transition to fully circular cities.

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“…Besides differences in species composition, trees' physiological status differs in urban compared to rural conditions because of changes in environmental conditions. Most prominently, urban centers are characterized by higher air temperatures as compared to suburbs which is the so called urban heat island (UHI) effect (Ajaaj et al, 2018;Saaroni et al, 2018). Higher temperatures in urban centers trigger higher BVOC emissions leading to higher ozone concentrations, an effect that is expected to increase with global warming (IPCC, 2014;Li et al, 2015).…”

Section: The Rural-urban Gradient In Context Of Tree-ozone Interactionsmentioning

confidence: 99%

The Interplay Between Ozone and Urban Vegetation—BVOC Emissions, Ozone Deposition, and Tree Ecophysiology

Fitzky¹,

Sandén²,

Karl³

et al. 2019

Front. For. Glob. Change

102

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Urban Green Infrastructure as a tool for urban heat mitigation: Survey of research methodologies and findings across different climatic regions

Cited by 194 publications

References 89 publications

Urban Cold and Heat Island in the City of Bragança (Portugal)

Urban Cold and Heat Island in the City of Bragança (Portugal)

Enhancing the circular economy with nature-based solutions in the built urban environment: green building materials, systems and sites

The Interplay Between Ozone and Urban Vegetation—BVOC Emissions, Ozone Deposition, and Tree Ecophysiology

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