Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XXXIX-B8, 381-386, 2012
http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XXXIX-B8/381/2012/
doi:10.5194/isprsarchives-XXXIX-B8-381-2012
© Author(s) 2012. This work is distributed
under the Creative Commons Attribution 3.0 License.
 
30 Jul 2012
CHANGE ANALYSIS OF THE SPECTRAL CHARACTERISTICS OF RUBBER TREES AT CANOPY AND LEAF SCALES DURING THE BRAZILIAN AUTUMN
C. H. Amaral1, T. I. R. Almeida1, G. C. M. Quitério2, M. N. Alves3, and C. R. Souza Filho2 1Institute of Geosciences, University of São Paulo, Rua do Lago 562, 05508-080, São Paulo, SP, Brazil
2Institute of Geosciences, University of Campinas, Rua João Pandiá Calógeras 51, 13083-870, Campinas, SP, Brazil
3Multidisciplinary Center of Chemical, Biological and Agricultural Research, University of Campinas, P.O. BOX 6171, 13081-970, Campinas, SP, Brazil
Keywords: Forestry, spectral, weather, comparison, hyperspectral, high resolution Abstract. The objective of this work is to investigate the hyperspectral remote sensing potential to detect spectral changes undergone by clones of two rubber trees within Brazilian Autumn, with decrease of rain, temperature and photoperiod between May and June. Indirectly, we also analyze the ability of the data to help discriminating the clones at two dates in autumn. The average canopy spectra of the stands were obtained with two overpasses of the ProSpecTIR-VS airborne hyperspectral sensor (357 bands between 400–2,500 nm; spatial resolution of 1m) by 14th May and 17th June, in 2010 year. Additionally measurements of leaf spectra were taken in the same dates, but in the 2011 year. Considering the analysis of the spectra measured from the three stands, this indicates that spectral differences in the VIS (400–700 nm) region are of genetic origin and occur regardless of environmental conditions and period of data collection. In the NIR (700–1,300 nm) range, the environmental factors predominate in the two periods of data collection. The SWIR (1,300–2,500 nm) displayed the largest differences between the months of data collection. In May, the relationship between stands indicated the prevalence of environmental aspects. However, in June, the stands and clones spectral behaviour indicates that as the temperature, the rainfall and the photoperiod are lower closer to winter, the SWIR can be effectively used to discriminate and map these clones separately.
Conference paper (PDF, 2374 KB)


Citation: Amaral, C. H., Almeida, T. I. R., Quitério, G. C. M., Alves, M. N., and Souza Filho, C. R.: CHANGE ANALYSIS OF THE SPECTRAL CHARACTERISTICS OF RUBBER TREES AT CANOPY AND LEAF SCALES DURING THE BRAZILIAN AUTUMN, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XXXIX-B8, 381-386, doi:10.5194/isprsarchives-XXXIX-B8-381-2012, 2012.

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