Great Barrier Reef from Envisat
|Weekly image: Week 50, 2006
Great Barrier Reef seen from Envisat.
The satellite image shows approximate 150 km of the Great
Barrier Reef. This coral reef is the largest in the world and it
stretches in total 2.300 km along the east coast of Australia.
The image shows a small part of the reef near Cape York
Peninsula in northern Australia. The imaged area is located 15º
degrees south of the Equator (north of the town Cooktown). The
ocean is tropical with a unique marine life along the reef. The
reef itself is constructed of limestone from millions of dead
animals and plants that once grew. Today a broad range of
animals and plants are living on top of the dead material. The
turquoises color in the image reveals the structure and geometry
of the coral reef. The limestone is white and it reflects a
large amount of sunlight. In contrast, the open sea does not
reflect much light and therefore the ocean is dark blue. The
Great Barrier Reef is a marine protected area. White clouds are
mainly located over land in this image.
MERIS Full resolution image is from Envisat and the date of
acquisition is 4 December 2006 at time 00.01 UTC. The pixel size
is 300m x 300m. The image is shown as a true-color image meaning
that the colors red, green and blue observed from the bands at
MERIS are combined in the red, green and blue channels for