Underground natural refrigerator dug into permafrost at Alert weather station
Stanley Needleman
35mm slide
20th century Canada Image
Live steam is used to melt permafrost for installation of thermocouple in delta
Stanley Needleman
35mm slide
20th century Greenland Image
Digging test pit and installing thermocouple into permafrost below the delta
Stanley Needleman
35mm slide
20th century Greenland Image
Frank Maher installing thermocouple into pit to measure air and ground temp.
Stanley Needleman
35mm slide
20th century Greenland Image
Soil polygons at Centrum Lake on delta, permafrost under soil indicated
Stanley Needleman
35mm slide
20th century Greenland Image
Using live steam to melt permafrost to be able to drill into the frozen zone
Stanley Needleman
35mm slide
20th century Greenland Image
Using heated crowbar chisel to chop frozen soil and extend the drill hole
Stanley Needleman
35mm slide
20th century Greenland Image
Test pit in runway at Centrum Lake. Permafrost 36" deep. Melt water in bottom
Stanley Needleman
35mm slide
20th century Greenland Image
Permafrost raised polygons from the air in Peary Land.
Stanley Needleman
35mm slide
20th century United States image
Soil polygons at Centrum Lake indicating permafrost underlying the surface.
Stanley Needleman
35mm slide
20th century Greenland Image
Ridge between soil polygons reflects stripe pattern ground overlying permafros
Stanley Needleman
35mm slide
20th century Greenland Image
Jeep stuck in thawed permafrost zone near Polaris Bay, Polaris Promontory.
Stanley Needleman
35mm slide
20th century Greenland Image
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