Analysis of nocturnal air temperature in districts using mobile measurements and a cooling indicator

Leconte, François; Bouyer, Julien; Claverie, Rémy; Pétrissans, Mathieu

doi:10.1007/s00704-016-1886-7

Cited by 37 publications

(27 citation statements)

References 25 publications

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“…In Szeged, cooling rates among LCZ classes diverge markedly 1 h prior to sunset, lasting until 3 h after sunset; cooling rates then converge for the remainder of the night. These findings agree with recent results for the LCZ classes of Nancy, France (Leconte et al ., ). Researchers have hypothesized that such divergent cooling rates around sunset are due to site‐specific conditions that drive radiative flux divergence in the canopy layer (e.g.…”

Section: Discussionmentioning

confidence: 97%

Employing an urban meteorological network to monitor air temperature conditions in the ‘local climate zones’ of Szeged, Hungary

Skarbit

Stewart

Unger

et al. 2017

Intl Journal of Climatology

148

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We analyse the average annual and seasonal air temperature conditions in the ‘local climate zones’ (LCZs) of Szeged, Hungary. The basis of our analysis is a 1‐year dataset from 2014 to 2015 for a 20‐station urban meteorological network. The network and its corresponding LCZ classes put temperature studies in Szeged into a new spatial framework to assess local climate and urban heat island (UHI) conditions. The stations were installed at locally representative sites using a Geographic Information System (GIS) method based on the standard surface parameters of the LCZ classification. The network was purposely designed to monitor thermal differences among LCZ classes in Szeged. We provide detailed site metadata for each of the monitoring stations used in the analysis. Our results show that the densely built‐up LCZ classes have higher annual and monthly mean and minimum air temperatures than structurally open and more vegetated classes, with nocturnal differences of >4 °C observed under calm, clear skies. Among select temperature indices measured in the urban LCZ classes, frost days, cooling degree‐days, and tropical nights differ markedly from the background rural LCZ classes. This difference suggests that local climatologies exist within Szeged, and that these have implications for thermal comfort, urban energy use, and urban agriculture. Finally, the evaluation of heating and cooling rates in Szeged shows an important role for LCZs in UHI analysis.

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Section: Discussionmentioning

confidence: 97%

Employing an urban meteorological network to monitor air temperature conditions in the ‘local climate zones’ of Szeged, Hungary

Skarbit

Stewart

Unger

et al. 2017

Intl Journal of Climatology

148

View full text Add to dashboard Cite

show abstract

“…The impact of the structures in these zones on both the ambient as well as the surface temperature has been demonstrated in various studies, e.g., using in situ weather stations for temperature measurements (e.g., [152][153][154][155][156]) or LST as derived from remote sensing (e.g., [157][158][159][160]). Overall, findings are consistent indicating an increase of temperatures inside urban areas.…”

Section: Derivationmentioning

confidence: 99%

Remote Sensing in Environmental Justice Research—A Review

Weigand

Wurm

Dech

et al. 2019

IJGI

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Human health is known to be affected by the physical environment. Various environmental influences have been identified to benefit or challenge people’s physical condition. Their heterogeneous distribution in space results in unequal burdens depending on the place of living. In addition, since societal groups tend to also show patterns of segregation, this leads to unequal exposures depending on social status. In this context, environmental justice research examines how certain social groups are more affected by such exposures. Yet, analyses of this per se spatial phenomenon are oftentimes criticized for using “essentially aspatial” data or methods which neglect local spatial patterns by aggregating environmental conditions over large areas. Recent technological and methodological developments in satellite remote sensing have proven to provide highly detailed information on environmental conditions. This narrative review therefore discusses known influences of the urban environment on human health and presents spatial data and applications for analyzing these influences. Furthermore, it is discussed how geographic data are used in general and in the interdisciplinary research field of environmental justice in particular. These considerations include the modifiable areal unit problem and ecological fallacy. In this review we argue that modern earth observation data can represent an important data source for research on environmental justice and health. Especially due to their high level of spatial detail and the provided large-area coverage, they allow for spatially continuous description of environmental characteristics. As a future perspective, ongoing earth observation missions, as well as processing architectures, ensure data availability and applicability of ’big earth data’ for future environmental justice analyses.

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“…We here attempt to apply two urban typologies to Dijon, France, UCZ and LCZ. Considered as the latest urban typology for climate studies (Leconte et al, 2016), LCZs have generally been used for cities of over one million inhabitants, e.g. Glasgow (Emmanuel and Krüger, 2012), Hong Kong (Lau et al, 2015;Zheng et al, 2018), Madrid (Brousse et al, 2016), and for a comparison of eight cities (Beijing, Chicago, Hong Kong, Khartoum, Lisboa, Madrid, Milano, and Sao Paulo) from five continents (Bechtel et al, 2016).…”

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confidence: 99%

How relevant are local climate zones and urban climate zones for urban climate research? Dijon (France) as a case study

et al. 2018

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Several typologies of urban surface properties have been proposed, in recent years, for urban heat island studies and climate modeling. Some were specifically developed for cities and urban climate issues, like the Urban Climate Zones, and the more recent Local Climate Zones. The initial objective of this paper is to evaluate the capacity of these two typologies to identify thermal environments in and around cities, and to determine which typology best captures the daily spatio-temporal patterns of surface and urban canopy heat islands. To simulate urban climate with a model, LULC data based on a given typology are required. To avoid circularity, we combined the Corine Land Cover database, with data for the whole of Europe, and the BD TOPO database, for France, to form a new tool, CLC_USGS, which we used as input for the WRF limitedarea model, with a 150-m grid resolution. The capacity of each typology to identify coherent thermal zones was estimated for Dijon, a medium-sized French city, during a three-week heat wave, over a 24-hour period, in conditions favorable to urban heat island development. The comparison was based on hourly air temperatures directly output from the WRF model, those obtained from the purpose-built MUSTARDijon 47-sensor meteorological network, and NDVI values and land surface temperatures estimated from Landsat images for 11 July 2015 at 1030 UTC. Typical diurnal variations and spatial contrasts of surface and air temperatures were identified in both simulations and observations. As both typologies show significant capacity for identifying thermally coherent intra-urban areas, this study suggests that they could both be useful for urban climate applications. The typology that is most generally applicable in worldwide contexts is Local Climate Zones. 1. Introduction Urbanization and urban expansion linked to demographic growth produce diverse mosaics of built and non-built surfaces. This diversity results in very different surface energy budgets and Urban Heat Island (UHI) effects, induced by impermeable, heat-storing

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Analysis of nocturnal air temperature in districts using mobile measurements and a cooling indicator

Cited by 37 publications

References 25 publications

Employing an urban meteorological network to monitor air temperature conditions in the ‘local climate zones’ of Szeged, Hungary

Employing an urban meteorological network to monitor air temperature conditions in the ‘local climate zones’ of Szeged, Hungary

Remote Sensing in Environmental Justice Research—A Review

How relevant are local climate zones and urban climate zones for urban climate research? Dijon (France) as a case study

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