A multi-scale approach to urban thermal analysis

Gluch, Renee; Quattrochi, Dale A.; Luvall, Jeffrey C.

doi:10.1016/j.rse.2006.01.025

Cited by 116 publications

(62 citation statements)

References 20 publications

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“…Landsat data show relatively high temperatures, which were more reliable relative to the actual measured data. ATLAS data (10 m resolution) or TABI (2 m resolution) performed well in community level studies in terms of thermal exchange [33,34], while ASTER and Landsat data were more appropriate for large area thermal studies. In this study, UHI calculated from the Landsat sensor was more consistent with ground truthed temperatures.…”

Section: Resultsmentioning

confidence: 99%

Optimal Satellite Sensor Selection Utilized to Monitor the Impact of Urban Sprawl on the Thermal Environment in Doha City, Qatar

NY¹,

Ahmed²

2015

J Earth Sci Clim Change

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In the present study, the most appropriate Landsat and ASTER Image spatial and spectral resolutions were selected to extract thermal infrared data in Doha City, Qatar from 1990-2015. Results indicated Urban Heat Island (UHI) calculated from Landsat sensor data was more consistent with ground truthed temperatures. Landsat TM thermal infrared data with low spatial resolution (60-120 m) was more appropriate for large-scale thermal studies, but was not suitable to assess complex urban thermal environments and establish Land Surface Temperatures (LSTs) for individual buildings. However, ASTER sensor, with a Thermal Infrared (TIR) subsystem of 90 m spatial resolution, showed more accurate determination of thermal patterns and LSTs. Landsat data revealed relatively high temperatures, which exhibited increased congruence with ground truthed measures. In Doha City, LST showed an increased trend from 1990 to 2015; low in 1990, moderate in 2000, to very high in 2015. Furthermore, our results confirmed accelerated urban sprawl during 1990-2015. The evaluated areas increased from 80 km 2 in 1990 to 179 km 2 in 2015. A strong positive relationship was observed between UHI and urban area intensity. Urban planning absence significantly affected the rural environment. Urbanized areas exhibited high thermal conductivity and radiation heat budgets, characterized by increased atmospheric and surface temperatures compared to surrounding rural areas. Therefore, rapid urbanization rates must undergo proper planning and management regimes to insure positive impacts on the local climate and environment.

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Section: Resultsmentioning

confidence: 99%

Optimal Satellite Sensor Selection Utilized to Monitor the Impact of Urban Sprawl on the Thermal Environment in Doha City, Qatar

NY¹,

Ahmed²

2015

J Earth Sci Clim Change

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“…Pixel-based approaches are most common. Traditional parametric classifiers, such as maximum-likelihood are regularly applied for urban land cover classifications (e.g., [50,103]). Sub-pixel mapping in the form of linear spectral unmixing is widely used as urban objects are relatively small [104].…”

Section: Multispectral Approachesmentioning

confidence: 99%

Can the Future EnMAP Mission Contribute to Urban Applications? A Literature Survey

et al. 2011

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With urban populations and their footprints growing globally, the need to assess the dynamics of the urban environment increases. Remote sensing is one approach that can analyze these developments quantitatively with respect to spatially and temporally large scale changes. With the 2015 launch of the spaceborne EnMAP mission, a new hyperspectral sensor with high signal-to-noise ratio at medium spatial resolution, and a 21 day global revisit capability will become available. This paper presents the results of a literature survey on existing applications and image analysis techniques in the context of urban remote sensing in order to identify and outline potential contributions of the future EnMAP mission. Regarding urban applications, four frequently addressed topics have been identified: urban development and planning, urban growth assessment, risk and vulnerability assessment and urban climate. The requirements of four application fields and associated image processing techniques used to retrieve desired parameters and create geo-information products have been reviewed. As a result, we identified promising research directions enabling the use of EnMAP for urban studies. First and foremost, research is required to analyze the spectral information content of an EnMAP pixel used to support material-based land cover mapping approaches. This information can subsequently be used to improve urban indicators, such as imperviousness. Second, we identified the global monitoring of urban areas as a promising field of investigation taking advantage of EnMAP's spatial coverage and revisit capability.Remote Sens. 2011, 3 1818However, owing to the limitations of EnMAPs spatial resolution for urban applications, research should also focus on hyperspectral resolution enhancement to enable retrieving material information on sub-pixel level.

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“…For instance, both Platanus and Robinia are important street species in many Mediterranean and continental European cities, and have emissions comparable to Eucalyptus, suggesting that emissions from these species can play an important role in urban air chemistry. Urban areas are growing worldwide, for instance, Salt Lake City has a spatial annual growth rate of 2.2% (Gluch et al 2006) and Xiamen, China is growing at 4% per annum (Quan et al 2006), and major land-use changes have occurred within surrounding urban and suburban areas (Kong & Nakagoshi 2006;Xiao et al 2006). This suggests that the importance of emissions from ornamental plants is continuously increasing.…”

Section: Implications For Air Chemistry Scenariosmentioning

confidence: 99%

“…In particular, many broadleaf species have been considered in emission inventories as 'nonemitters' , but there is increasing evidence that these broadleaf 'non-emitters' are, in fact, moderate to strong monoterpene emitters (Centritto et al 2005;Dindorf et al 2006). Further, given that urban environments form so-called heat islands, being on average 1-2°C warmer than rural environments (Benjamin et al 1996;Gluch et al 2006;Kong & Nakagoshi 2006), and that emissions of volatiles are highly temperature-dependent, with emission rates increasing three to sixfold for every 10°C elevation in temperature (Schuh et al 1997;Peñuelas & Llusià 2001;Schnitzler et al 2002;Niinemets 2004), even weak to moderate potentials to emit monoterpene compounds (emission potentials) can be significant in urban environments. Beside the influence of temperature on monoterpene emission potentials, recent investigations also show that altered temperatures lead to altered emission patterns due to differences in monoterpene physico-chemical properties (Copolovici & Niinemets 2005;Noe et al 2006), suggesting potentially altered emission composition and temporal dynamics in city atmospheres compared with natural forests.…”

Section: Introductionmentioning

confidence: 99%

Monoterpene emissions from ornamental trees in urban areas: a case study of Barcelona, Spain

2008

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Research on biogenic volatile organic compound (BVOC) emissions has mainly focused on native species in natural ecosystems. However, much of the ozone and aerosol formation occurs in city atmospheres due to BVOC emissions by local urban vegetation. Plant composition of urban habitats is often dominated by non‐native ornamental plant species, for which only limited data on BVOC emissions are available. To gain insight into the influence of ornamental vegetation on the urban atmospheric reactivity in Barcelona, Spain, we studied volatile isoprenoid emissions in 11 widespread ornamental tree species (three conifers and nine angiosperms). We found significant monoterpene emissions in all studied species, with normalized emission potentials (T = 30 °C, photosynthetic photon flux density (PPFD) = 1000 μmol·m−2·s−1) ranging between 0.2 to 110 μg·g−1 (dry weight) h−1. Depending on species, the emissions were dominated by α‐ and β‐pinene, myrcene, α‐ and β‐phellandrene, carene, limonene and eucalyptol. These data demonstrate that ornamental plants may significantly contribute to the BVOC load in urban atmospheres and also underscore the importance of broadleaf angiosperms as significant monoterpene emitters.

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A multi-scale approach to urban thermal analysis

Cited by 116 publications

References 20 publications

Optimal Satellite Sensor Selection Utilized to Monitor the Impact of Urban Sprawl on the Thermal Environment in Doha City, Qatar

Optimal Satellite Sensor Selection Utilized to Monitor the Impact of Urban Sprawl on the Thermal Environment in Doha City, Qatar

Can the Future EnMAP Mission Contribute to Urban Applications? A Literature Survey

Monoterpene emissions from ornamental trees in urban areas: a case study of Barcelona, Spain

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