Urban albedo derived from direct measurements and landsat 4 TM satellite data

Soler, M. R.; Ruiz, C.

doi:10.1002/joc.3370140808

Cited by 6 publications

(3 citation statements)

References 9 publications

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“…Urban albedo measurements from satellite platforms are presented by Brest (1987), Kidder and Wu (1987), Soler and Ruiz (1994) and Vukovich (1983). The large spatial variability in albedo found by Kidder and Wu (1987) for urban-rural areas with a snowcover is consistent with the simulation results of Arnfield (1982b).…”

Section: Urban Radiation Balancesupporting

confidence: 75%

Two decades of urban climate research: a review of turbulence, exchanges of energy and water, and the urban heat island

Arnfield

2003

Intl Journal of Climatology

2,834

1,518

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Progress in urban climatology over the two decades since the first publication of the International Journal of Climatology is reviewed. It is emphasized that urban climatology during this period has benefited from conceptual advances made in microclimatology and boundary-layer climatology in general. The role of scale, heterogeneity, dynamic source areas for turbulent fluxes and the complexity introduced by the roughness sublayer over the tall, rigid roughness elements of cities is described. The diversity of urban heat islands, depending on the medium sensed and the sensing technique, is explained. The review focuses on two areas within urban climatology. First, it assesses advances in the study of selected urban climatic processes relating to urban atmospheric turbulence (including surface roughness) and exchange processes for energy and water, at scales of consideration ranging from individual facets of the urban environment, through streets and city blocks to neighbourhoods. Second, it explores the literature on the urban temperature field. The state of knowledge about urban heat islands around 1980 is described and work since then is assessed in terms of similarities to and contrasts with that situation. Finally, the main advances are summarized and recommendations for urban climate work in the future are made.

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Section: Urban Radiation Balancesupporting

confidence: 75%

Two decades of urban climate research: a review of turbulence, exchanges of energy and water, and the urban heat island

Arnfield

2003

Intl Journal of Climatology

2,834

1,518

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“…Arnfield (1982) reported a range in albedo from 0.08 to 0.20 over cities that include residential, commercial, and industrial areas. Urban albedo measurements derived from satellite or airborne measurements are presented in Vukovich (1983), Brest (1987), Kidder and Wu (1987), Takamura (1992), Soler and Ruiz (1994), Nakagawa and Nakayama (1995), and Sugawara (2001). Urban albedo values obtained from tower measurements are in Offerle et al (2003), Christen and Vogt (2004), and Moriwaki and Kanda (2004).…”

Section: Urban Surfaces As the Bottommentioning

confidence: 99%

Progress in Urban Meteorology :A Review

Kanda

2007

Journal of the Meteorological Society of Japan

101

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This paper reviews the progress made in urban meteorology over the past few decades. The focus is on the impact of urban surfaces on the overlying atmosphere along the conventional meteorological frameworks. Section 1 details the difficulties in generalizing urban surfaces in a meteorological sense because of surface diversity, and considers whether conventional similarity law is applicable. Section 2 describes the characteristics of urban surfaces as the bottom boundary of the atmosphere and includes a discussion of land surface parameters and the resultant surface energy partitioning. Section 3 explains characteristics of the urban atmosphere, including temperature fields, local circulations and rainfall. Section 4 describes recent progress in numerical modeling and promising new technologies, thus revealing a possible future direction for urban meteorological studies.

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“…It is often assessed using remote-sensing methods (Brest 1987;Sailor 1995;Taha 1997). In this context, among the most commonly used satellites are the ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer), the LANDSAT TM and ETM+ and also the SPOT sensor (Satellite Pour l'Observation de la Terre) (Chrysoulakis 2003;Frey et al 2007;Hafner and Kidder 1999;Small 2005;Soler and Ruiz 1994). Singleband albedos are often directly derived from top of the atmosphere radiances using look up tables (LUTs) containing information about the composition of the atmosphere, which is done, for example, for the ASTER surfacereflectance product (NASA 2007a).…”

Section: Introductionmentioning

confidence: 99%

Geometry effect on the estimation of band reflectance in an urban area

Frey

Parlow

2008

Theor Appl Climatol

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Reflectance of the urban surface is an important factor for urban climate studies and can be assessed using standard remote sensing applications. However, no application considers the three-dimensional structure of the city surface and its resulting shading patterns or the inclined roof surfaces. To determine the effect of these factors on the estimation of urban surface reflectance, a high-resolution raster-based city-surface model was used to estimate the spatial solar irradiance in an example city, namely Basel in Switzerland. Eight times daily for 1 year, the solar irradiance was calculated using MODTRAN and the illumination geometry of the city. Subsequently, the spatial distribution of the solar irradiance, as well as the error in assumed reflectance values were analysed. The error in estimation of reflectance increased with lower solarelevation angle, so its maxima were found in winter. Higher visibility of the assumed atmosphere also increased the estimated error due to the lower proportion of diffuse irradiance. The error decreased with coarser spatial resolution of the pixel.

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Urban albedo derived from direct measurements and landsat 4 TM satellite data

Cited by 6 publications

References 9 publications

Two decades of urban climate research: a review of turbulence, exchanges of energy and water, and the urban heat island

Two decades of urban climate research: a review of turbulence, exchanges of energy and water, and the urban heat island

Progress in Urban Meteorology :A Review

Geometry effect on the estimation of band reflectance in an urban area

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