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Filtering by: Creator De Sousa, Celio Helder Resende

Remote Sensing of Photosynthetic Light-use Efficiency of the Amazonian Rainforests

Creator:

De Sousa, Celio Helder Resende

Abstract:

When conditions for photosynthesis are unfavorable, excess solar radiation is dissipated as heat from leaves through a shift in xanthophyll pigments that result in reflecting rather than absorbing light at some wave lengths. The shift in xanthophyll pigments can be quantified as a photochemical reflectance index (PRI) by monitoring specific...

Resource Type:

Dissertation

Full Text:

AN ABSTRACT OF THE DISSERTATION OF Celio Helder Resende de Sousa for
Seasonality and drought effects of Amazonian forests observed from multi-angle satellite data

Creator:

de Moura, Yhasmin Mendes, Hilker, Thomas, Lyapustin, Alexei I., Galvão, Lênio Soares, dos Santos, João Roberto, Anderson, Liana O., Resende de Sousa, Célio Helder, and Arai, Egidio

Abstract:

Seasonality and drought in Amazon rainforests have been controversially discussed in the literature, partially due to a limited ability of current remote sensing techniques to detect its impacts on tropical vegetation. We use a multi-angle remote sensing approach to determine changes in vegetation structure from differences in directional scattering (anisotropy)...

Resource Type:

Article

Full Text:

, Liana O. Anderson d,e, Célio Helder Resende de Sousa b, Egidio Arai a a National Institute for Space