Authors
Thomas Hilker, Lênio Soares Galvão, Luiz EOC Aragão, Yhasmin M de Moura, Cibele H do Amaral, Alexei I Lyapustin, Jin Wu, Loren P Albert, Marciel José Ferreira, Liana O Anderson, Victor AHF dos Santos, Neill Prohaska, Edgard Tribuzy, João Vitor Barbosa Ceron, Scott R Saleska, Yujie Wang, José Francisco de Carvalho Gonçalves, Raimundo Cosme de Oliveira Junior, João Victor Figueiredo Cardoso Rodrigues, Maquelle Neves Garcia
Publication date
2017/6/1
Journal
International journal of applied earth observation and geoinformation
Volume
58
Pages
278-287
Publisher
Elsevier
Description
As a preparatory study for future hyperspectral missions that can measure canopy chemistry, we introduce a novel approach to investigate whether multi-angle Moderate Resolution Imaging Spectroradiometer (MODIS) data can be used to generate a preliminary database with long-term estimates of chlorophyll. MODIS monthly chlorophyll estimates between 2000 and 2015, derived from a fully coupled canopy reflectance model (ProSAIL), were inspected for consistency with eddy covariance fluxes, tower-based hyperspectral images and chlorophyll measurements. MODIS chlorophyll estimates from the inverse model showed strong seasonal variations across two flux-tower sites in central and eastern Amazon. Marked increases in chlorophyll concentrations were observed during the early dry season. Remotely sensed chlorophyll concentrations were correlated to field measurements (r2 = 0.73 and r2 = 0.98) but …
Scholar articles
T Hilker, LS Galvão, LEOC Aragão, YM de Moura… - International journal of applied earth observation and …, 2017