Retreat Of Upsala Glacier
This photograph by an astronaut on the International Space Station highlights the snout of the Upsala Glacier (å¡S, å¡W) on the Argentine side of the North Patagonian Icefield. Ice flow in this glacier comes from the north (right in this rotated image). Dark lines of rocky debris (moraine) within the ice give a sense of the slow ice flow from right to left. A smaller, side glacier joins Upsala at the present-day ice front, the wall from which masses of ice periodically collapse into Lago (Lake) Argentino. The surface of Lago Argentino is whitened by a mass of debris from a recent collapse of the ice wall. Remotely sensed data, including astronaut images, have recorded the position of the ice front over the years. A comparison of this image with older data indicates that the ice front has moved backwards - upstream - about 3 kilometers (2 miles). This retreat is believed by scientists to indicate climate warming in this part of South America. The image was taken by the Expedition 37 crew.
Size: 3600px × 2401px
Photo credit: © Photo Researchers / Alamy / Afripics
License: Licensed
Model Released: No
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