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A
time series of 8 ERS-1 SAR images obtained at 3 day interval in February and March
1992 shows how the ice edge changes with varying wind in the Hopen area (see the
location of the SAR image).
The wind data from this area is shown in this figure.
In the period from 21 February to 24 February SE winds prevailed and pushed the ice edge northwards.
From 24 to 27 February the winds were low and no displacement of the main ice edge was observed, however formation of grease ice and pancake ice is clearly seen in the image of 27 February .
In the next 3 days more SE winds pushed the ice edge north of Hopen. From 1 March to 4 March northerly winds displaced the ice edge back to south of Hopen, where it remained for the next 9 days (see 7 March , 10 March , 13 March ). In all images areas of new ice formation can be seen outside the main ice edge, caused by low air temperatures from -10 to -25ºC. Areas of open water around the island also show how the ice has moved in different directions 1 -2 days prior to each image.
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