Icebergs off the East Greenland Coast
ERS-1 SAR image covers about 20x40 km of a fjord at 63º40' N (see map
) where several icebergs were observed off the coast on 3 October 1993. The image
shows waves propagating towards the coast. They are about 300 m long and are attenuated
as they enter shallow water. The fjord is covered with new ice and at the mouth
of the fjord a cluster of icebergs can be observed.
One of the icebergs in the upper right corner was also observed from a ship in
The iceberg is about 500 m long and 50 - 100 m wide, and is characterized by very
bright signature. The iceberg is surrounded by open water, and the dark area to
the west of the iceberg is assumed to be an area of fresh water release by the
iceberg. Smaller icebergs, with horizontal extent of less than 200 m are often
difficult to identify in ERS SAR images.
The icebergs are difficult to detect even after noise filtering of the full-resolution
image because iceberg signals can be similar to speckle noise.
NERSC, Bergen, Norway
Keywords: ESA European
Space Agency - Agence spatiale europeenne,
observation de la terre, earth observation,
satellite remote sensing,
teledetection, geophysique, altimetrie, radar,
chimique atmospherique, geophysics, altimetry, radar,