Formation of new ice along the Greenland Coast in October
 This
ERS-1 SAR image has been acquired on 3-10-1993 at the Tromsø Satellite
Station when the first new ice has formed in the fjords of the lower left part
of the image (grey signature). The fjords further north are almost ice free (dark
signature except for some scattered bands of ice in the Egede and Rothes Fjord).
The image covers a part of the Greenland Ice Cap, some fjords, and the open ocean
at about 66ºN (see map
)
A simplified interpretation of the image is shown in this figure
.
The difference in open water backscatter (between the area near land and further
east) is caused by small changes in wind speed. The ice cap has varying signature
reflecting different wetness, snow structure and roughness of the surface. In
the summer wet snow tends to give low backscatter from glaciers, while in the
winter the backscatter is high.
Atmospheric gravity waves are sometimes observed in SAR images due to oscillations
of the surface wind speed.
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,
atmospheric chemistry
|
EO Data Access
This
ERS-1 SAR image has been acquired on 3-10-1993 at the Tromsø Satellite
Station when the first new ice has formed in the fjords of the lower left part
of the image (grey signature). The fjords further north are almost ice free (dark
signature except for some scattered bands of ice in the Egede and Rothes Fjord).
The image covers a part of the Greenland Ice Cap, some fjords, and the open ocean
at about 66ºN (see map
)
