Air quality influenced by urban heat island coupled with synoptic weather patterns

Lai, Li-Wei; Cheng, Wan-Li

doi:10.1016/j.scitotenv.2008.12.002

Cited by 142 publications

(65 citation statements)

References 19 publications

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“…Several studies have investigated the relation of urban warming with the tropospheric ozone concentration [17,64,65]. As reported in [17], It was calculated that for a temperature increase of 1 F, (0.55 K), the number of days where the ozone threshold is exceeded, may increase by 10%.…”

Section: Environmental Impact Of Urban Warmingmentioning

confidence: 99%

Regulating the damaged thermostat of the cities—Status, impacts and mitigation challenges

Santamouris

2015

Energy and Buildings

200

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Section: Environmental Impact Of Urban Warmingmentioning

confidence: 99%

Regulating the damaged thermostat of the cities—Status, impacts and mitigation challenges

Santamouris

2015

Energy and Buildings

200

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“…Among other results, studies presented carbon dioxide variability at different scales and showed the influence of synoptic weather patterns as well as implications of boundary layer structure García et al 2010;Pérez et al 2009a, b). Moreover, CO 2 variations in urban areas have also been widely studied (Idso et al 2001;Grimmond et al 2002;Nasrallah et al 2003;Gratani and Varone 2005;Lai and Cheng 2009;Rice and Bostrom 2011). Atmospheric conditions and measurement procedures vary from one site to another and affect CO 2 concentrations.…”

Section: Introductionmentioning

confidence: 97%

Differences between carbon dioxide levels over suburban and rural sites in Northern Spain

García

Sánchez

Pérez

2011

Environ Sci Pollut Res

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Mean suburban CO(2) concentrations are 4.5 ppm higher than rural levels. Frequencies of suburban concentrations from 400 to 450 ppm were around twice the rural frequencies. The suburban daily evolution presented two maxima in the predawn hours and at 1900-2000 GMT, mainly associated to anthropogenic emissions which also affected maximum concentrations recorded in autumn-winter and minimum levels in summer. The rural variation with minimum values during the day and high levels at night is mainly related to vegetation activity which also impacts the highest CO(2) concentrations obtained in spring, coinciding with maximum vegetation growth. Boundary layer processes also affected variability of concentrations recorded at both sites. Air quality at the rural site was also influenced by air mass transport from the urban plume (S, SSE, and ESE), which had a mean CO(2) value of 402 ppm. By contrast, concentrations were low when SW-W and NW winds prevailed and brought cleaner air. The relationship between rural CO(2) concentrations and wind speed using a mathematical fit provides a valuable estimation of the background level at the site, 384.8 ppm.

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“…These decrease wind speeds and increase reflective surfaces that trap heat. Anthropogenic factors such as waste heat from vehicles and buildings; altered land surface cover so porous vegetation is replaced with non-porous materials thus restricting evaporative cooling [3] [4].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Urban Heat Island Using Remotely Sensed Imagery over Greater Cairo, Egypt

Abutaleb¹,

Ngie²,

Darwish³

et al. 2015

ARS

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The Urban Heat Island (UHI) results in significant and sometimes dramatic increases in air temperature differences between the urban environment and its surrounding areas. The heat island structure may extend from the ground to the top of roofs and canopy levels above ground. The Urban Heat Island effect is a leading factor in a long list of human health problems which are expected to increase with the rapid growth of urban populations and projected future climate change. Urban heat island studies can be conducted through either direct measurements of air temperature using automobile transects and weather station networks or through measuring surface temperature using airborne or satellite remote sensing. In this study, UHI was investigated over the Greater Cairo during both summer and winter seasons over two different dates. Landsat 7 ETM + data were used and the mono-window algorithm was applied in the study. Results emphasis that both types of heat islands exist in the study area i.e. the surface and the atmospheric heat islands. Temperature differences ranged between 0.5˚C to 3.5˚C and these are much related to the existing land use/covers. It could be concluded that expansion of urban areas in Greater Cairo has led to increased thermal radiation of land surface on the highly populated areas.

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Air quality influenced by urban heat island coupled with synoptic weather patterns

Cited by 142 publications

References 19 publications

Regulating the damaged thermostat of the cities—Status, impacts and mitigation challenges

Regulating the damaged thermostat of the cities—Status, impacts and mitigation challenges

Differences between carbon dioxide levels over suburban and rural sites in Northern Spain

Assessment of Urban Heat Island Using Remotely Sensed Imagery over Greater Cairo, Egypt

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