Sentences with phrase «glacier runoff declines»
There is a threshold of glacier extent reduction dependent on the magnitude of ablation rate increase, where glacier runoff declines, the few examples suggest this is in the 10 - 20 % areal extent loss.
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Even worse, loss of summer glacier runoff will mean a collapse of rice and wheat agriculture in the northwest of the country as Himalayan glaciers continue to melt (current estimates are as high as 80 % loss within 30 years, and runoff is already in decline).
As glacier area is lost there will be a long term decline in glacier runoff and alpine streamflow during the melt season.
The Canon del Plata hydropower project would experience a decrease from 1540 gigawatt - hours to 1250 gigawatt - hours for a 50 % glacier runoff reduction and decline to 970 gigawatt - hours for a 100 % glacier loss (Vergara et.
Thus, glacier retreat leads to an increase in spring runoff and a decline in summer runoff.
Eventually the resulting decline in glacier extent reduces the area available for melting causing a decrease in glacier runoff.
As a glacier retreats its area available for melting declines and so does glacier runoff in the summer.
To notice something is going on with the world's ice sheets, you could measure melting water runoff, glacier retreat or use satellites and GPS to measure ice volume decline.