Professional Paper 1386–A
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Figure 21. Landsat-7 ETM+ (bands 3, 4, 5) images show break-up on Great Slave Lake (lat 61.46°N., long 114.60°W.), Northwest Territories, Canada, in spring 2000: A, 4 May, B, 20 May, C, 5 June, and D, 21 June. The fracturing, weakening, and shrinkage of the ice are evident, as is the complete disappearance of ice from numerous smaller lakes long before Great Slave Lake was completely ice free. Each image covers an area of 185 km by 185 km on the ground.