Net radiation estimation under pasture and forest in Rondônia, Brazil, with TM Landsat 5 images
The main objective of this study is to obtain the spatial distribution of net radiation (R N) in two contrasting vegetation covers (forest and pasture) through the SEBAL algorithm, and to analyze its performance when applied to tropical humid atmospheric conditions. This study was conducted in the state of Rondônia in northwestern Brazil, using four Landsat TM images, as well as, digital elevation model data. The correlation coefficients between estimated (SEBAL) and measured values of R N, and surface albedo are of 0.97 and 0.88, respectively. These results present SEBAL as an important tool to be used in hydrological and environmental studies, and to obtain coherent temporal and spatial variations of surface characteristics, helping in the improvement and validation of model parameterizations. However, the applications of remote sensing techniques in tropical humid climates are difficult, because of the existence of a constant presence of convective clouds.
Main Authors: | SANTOS,C.A. COSTA DOS, NASCIMENTO,R.L. DO, RAO,T.V.R., MANZI,A.O. |
---|---|
Format: | Digital revista |
Language: | English |
Published: |
Universidad Nacional Autónoma de México, Centro de Ciencias de la Atmósfera
2011
|
Online Access: | http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0187-62362011000400006 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Mapping of Fractional Forest Cover in Rondonia, Brazil with a Combination of Terra MODIS and Landsat TM Images.
by: LU, D., et al.
Published: (2008-03-17) -
Oil palm phenological monitoring using landsat TM image.
by: International Palm Oil Congress, PIPOC 2003. Palm Oil: the Power-house for the Global Oils Fats Economy 24-28 August : Putrajaya, Malasia. Agriculture Conference : 49487., et al.
Published: (2003) -
Oil palm phenological monitoring using landsat TM image.
by: International Palm Oil Congress, PIPOC 2003. Palm Oil: the Power-house for the Global Oils Fats Economy 24-28 August : Putrajaya, Malasia. Agriculture Conference : 49487., et al. -
Exploring TM image texture and its relationships with biomass estimation in Rondônia, Brazilian Amazon.
by: LU, D., et al.
Published: (2006-05-12) -
Exploring TM image texture and its relationships with biomass estimation in Rondônia, Brazilian Amazon
by: Lu,Dengsheng, et al.
Published: (2005)