First order approximation of broadband directional Albedo with High Resolution Quickbird Imagery: A case study for arid urban areas

Albedo is a key forcing parameter controlling the planetary radiative energy budget and its partitioning between the surface and the atmosphere. Characterizing and developing high resolution albedo for an urban environment in arid regions is important because of the high urbanization rate in these r...

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Main Authors: KAPLAN, Shai, GALLETTI, Christopher S., CHOW, Winston T. L., MYINT, Soe W.
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Language:English
Published: Institutional Knowledge at Singapore Management University 2016
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Online Access:https://ink.library.smu.edu.sg/soss_research/3149
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spelling sg-smu-ink.soss_research-44062020-02-13T06:30:07Z First order approximation of broadband directional Albedo with High Resolution Quickbird Imagery: A case study for arid urban areas KAPLAN, Shai GALLETTI, Christopher S. CHOW, Winston T. L. MYINT, Soe W. Albedo is a key forcing parameter controlling the planetary radiative energy budget and its partitioning between the surface and the atmosphere. Characterizing and developing high resolution albedo for an urban environment in arid regions is important because of the high urbanization rate in these regions and because of the high land-cover heterogeneity within urban settings. Using a Monte Carlo simulation of a multi-variable regression, we (a) correlate directional solar reflectance (albedo) ground measurements from Phoenix, AZ, with four narrowband reflectance data from QuickBird, and (b) developed a new set of coefficients for converting QuickBird narrowband reflectances to albedo. The albedo models were then applied to a second image over Las Vegas, NV, to assess their feasibility and accuracy. Two wavebands, visible-near infrared (VNIR) and total shortwave albedo, were evaluated for two reflectance models: surface and top-of-atmosphere. Results show that it is possible to accurately estimate directional albedo from high resolution imagery, specifically QuickBird, with the most accurate result from an atmospherically corrected VNIR model. The methodology presented in this paper could thus be applied in other urban areas to obtain a first order estimation of albedo. The new set of coefficients can be applied as first order albedo estimate by researchers, urban planners, developers and city managers interested in the influence of high-resolution albedo on a myriad of urban ecosystem processes. 2016-02-10T08:00:00Z text https://ink.library.smu.edu.sg/soss_research/3149 Research Collection School of Social Sciences eng Institutional Knowledge at Singapore Management University Albedo urban Quickbird modeling arid regions high resolution Urban Studies and Planning
institution Singapore Management University
building SMU Libraries
continent Asia
country Singapore
Singapore
content_provider SMU Libraries
collection InK@SMU
language English
topic Albedo
urban
Quickbird
modeling
arid regions
high resolution
Urban Studies and Planning
spellingShingle Albedo
urban
Quickbird
modeling
arid regions
high resolution
Urban Studies and Planning
KAPLAN, Shai
GALLETTI, Christopher S.
CHOW, Winston T. L.
MYINT, Soe W.
First order approximation of broadband directional Albedo with High Resolution Quickbird Imagery: A case study for arid urban areas
description Albedo is a key forcing parameter controlling the planetary radiative energy budget and its partitioning between the surface and the atmosphere. Characterizing and developing high resolution albedo for an urban environment in arid regions is important because of the high urbanization rate in these regions and because of the high land-cover heterogeneity within urban settings. Using a Monte Carlo simulation of a multi-variable regression, we (a) correlate directional solar reflectance (albedo) ground measurements from Phoenix, AZ, with four narrowband reflectance data from QuickBird, and (b) developed a new set of coefficients for converting QuickBird narrowband reflectances to albedo. The albedo models were then applied to a second image over Las Vegas, NV, to assess their feasibility and accuracy. Two wavebands, visible-near infrared (VNIR) and total shortwave albedo, were evaluated for two reflectance models: surface and top-of-atmosphere. Results show that it is possible to accurately estimate directional albedo from high resolution imagery, specifically QuickBird, with the most accurate result from an atmospherically corrected VNIR model. The methodology presented in this paper could thus be applied in other urban areas to obtain a first order estimation of albedo. The new set of coefficients can be applied as first order albedo estimate by researchers, urban planners, developers and city managers interested in the influence of high-resolution albedo on a myriad of urban ecosystem processes.
format text
author KAPLAN, Shai
GALLETTI, Christopher S.
CHOW, Winston T. L.
MYINT, Soe W.
author_facet KAPLAN, Shai
GALLETTI, Christopher S.
CHOW, Winston T. L.
MYINT, Soe W.
author_sort KAPLAN, Shai
title First order approximation of broadband directional Albedo with High Resolution Quickbird Imagery: A case study for arid urban areas
title_short First order approximation of broadband directional Albedo with High Resolution Quickbird Imagery: A case study for arid urban areas
title_full First order approximation of broadband directional Albedo with High Resolution Quickbird Imagery: A case study for arid urban areas
title_fullStr First order approximation of broadband directional Albedo with High Resolution Quickbird Imagery: A case study for arid urban areas
title_full_unstemmed First order approximation of broadband directional Albedo with High Resolution Quickbird Imagery: A case study for arid urban areas
title_sort first order approximation of broadband directional albedo with high resolution quickbird imagery: a case study for arid urban areas
publisher Institutional Knowledge at Singapore Management University
publishDate 2016
url https://ink.library.smu.edu.sg/soss_research/3149
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