16 - 冰川融化

冰川融化 16
第三副 www.climatefresk.org 16 几乎所有的冰川都已经遭受了不同程度消融 其中有几百座已经完全消失 冰川对淡水 供应有重要的调节作用

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Cause

能量預算

能量預算


2
Consequences

海平面上升

冰川融化

A melting of 100 gigatons of ice per year is equivalent to about 0.28 mm per year of mean sea level rise. Thus, 15 to 35% of sea level rise is linked to the melting of glaciers, according the IPCC scenarios. 30% to 35% is linked to the expansion of water. The remainder is linked to the melting of the ice caps.
淡水資源

冰川融化

Melting glaciers threaten water supplies. Indeed, the relative importance of glacier melt water in summer can be considerable, contributing for example to 25% of August flows in the basins draining the European Alps, with an area of about 105 km2 and only 1% glacial cover. Their disappearance could be catastrophic for cities located in valleys watered by rivers flowing down from the surrounding mountains and for freshwater fauna. Glacier meltwater also increases in importance during droughts and heat waves.

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Other possible consequence

洪水

冰川融化

It is possible, in certain circumstances of high heat, that very fast rapid melting of glaciers may cause flooding. But the real concern about these glaciers is that they are gradually disappearing, depriving downstream irrigation of a top-up in summer.
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