Validation of the net radiation through sebal algorithm in different classes of land use and occupation in Rio de Janeiro

Henos Carlos Knupler Jordão Lisboa,Rafael Coll Delgado,Paulo Eduardo Teodoro,Givanildo De Gois,Iris Cristiane Magistrali,José Francisco De Oliveira-Junior

doi:10.14393/bj-v32n1a2016-33155

Henos Carlos Knupler Jordão Lisboa, Rafael Coll Delgado + Show 4 more

Open Access

https://doi.org/10.14393/bj-v32n1a2016-33155

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Abstract

The aim of this study was (a) to assess and evaluate the net radiation (R n ) by SEBAL algorithm and (b) to assess the net radiation (R n ) by the landscape’s spatial temporal dynamic using ISODATA algorithm, in entire city of Rio de Janeiro. Has been calculated the R n by using the TM sensor images and orbital platform Landsat 5 and by Penman-Monteith method (FAO 56) with the conventional meteorological station data (EMC). The R n values obtained with the SEBAL algorithm to the EMC cut area were slightly smaller than those obtained by the Penman-Monteith method (FAO 56), with VM = -36 (Wm -2 ) and EPE = 84.44 Wm -2 . The R n obtained by SEBAL has a high correlation with the values obtained in the surface. The R n values obtained with the algorithm for the land use and occupation classes in the city of Rio de Janeiro were similar to those reported by other authors for the same classes.

Highlights

Net radiation (Rn) is the main source of energy response for the heating of the soil and air and the evaporation process (SILVA et al, 2005)
Its knowledge is important to for characterizing and monitoring the climate and weather forecast, identifying interactions of radiative fluxes descending and ascending of short and long wave that interact between environmental variables and the surface, in addition to being relevant for formulating public policies (DI PACE et al, 2008; BIUDES et al, 2009; ANDRADE, 2009, SILVA et al, 2011)
Among the most commonly used algorithms in heat flux on the surface studies, it stands out SEBAL (Surface Energy Balance Algorithm for Land) proposed by Bastiaanssen et al (1998a). This algorithm has been used in numerous studies (MORAN, 1994; BASTIAANSSEN et al.,1998a; BASTIAANSSEN, 2000; GRANGER, 2000; SILVA et al, 2011 and 2014; ANDRADE et al, 2014)

Summary

Introduction

Net radiation (Rn) is the main source of energy response for the heating of the soil and air and the evaporation process (SILVA et al, 2005). There are several conventional devices, such as balance-radiometers, which measure the net radiation in situ (GOIS et al, 2016a) These devices only present good precision under similar conditions and in small areas (DI PACE et al, 2008). Among the most commonly used algorithms in heat flux on the surface studies, it stands out SEBAL (Surface Energy Balance Algorithm for Land) proposed by Bastiaanssen et al (1998a) This algorithm has been used in numerous studies (MORAN, 1994; BASTIAANSSEN et al.,1998a; BASTIAANSSEN, 2000; GRANGER, 2000; SILVA et al, 2011 and 2014; ANDRADE et al, 2014). It can be applied in digital images from any orbital sensor that perform radiance measurements in the visible channels, near and thermal infrared, such as: TM (Thematic Mapper) - Landsat 5 (BEZERRA et al, 2008; MENEZES et al, 2011), NOAA-AVHRR (TIMMERMANS; MEIJERINK, 1999; BASTIAANSSEN; ALI, 2003), MODIS/TERRA/AQUA (DI LONG et al, 2010; SANTOS, 2011; OLIVEIRA, 2012) and ASTER/TERRA (WANG et al, 2005)

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