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Page 1

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Variations in
Mass Balance:
Advance and
Retreat

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Variations in the mass balance of a glacier can
lead to advance or retreat.

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The front of the Athabasca Glacier, British
Columbia, Canada.

Lateral
moraine




Former
position of Terminal
snout moraine

Page 4

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Page 5

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The Mer de Glace displays evidence
of a negative mass balance.

Page 6

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Examples of the impact of surging glaciers.

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This image shows the termini of the glaciers in the Bhutan-Himalaya. Glacial lakes
have been rapidly forming on the surface of the debris-covered glaciers in this region
during the last few decades.
According to the USGS scientist, glaciers in the Himalaya are wasting at alarming and
accelerating rates, as indicated…

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