Fig. 1.
A ∼100-km2 Central Amazon landscape shows a change in surface reflectance from (A) 2004 to (B) 2005, with patches exhibiting high short-wave infrared reflectance (red channel) indicative of disturbance across the entire image (green channel, near infrared) (B). After masking out (black pixels) all land use, rivers, roads, clouds, and areas with a high shade fraction (C), a mortality map (D) was generated based on a relationship between field-measured tree mortality and the ΔNPV remote-sensing metric. Tree mortality in this scene (D) demonstrated a variety of patch sizes ranging from isolated single-pixel disturbances, to large contiguous blowdown patches of ∼30 ha.