Glacier change in arctic Canada: rates, mechanisms and implications for global sea level

该提案将评估过去10-30年加拿大北极冰川质量的变化及其对全球海平面的影响。海平面上升是一个令人担忧的问题，因为在现今海平面海拔1米以内的土地上，全世界有超过1.5亿人，超过1万亿美元的基础设施，以及超过9440亿美元/年的经济活动。目前的海平面变化率表明，到2100年，海平面至少将进一步上升0.25米，但0.8 - 2米的变化是可以想象的。陆地冰的消耗是目前海平面上升的主要原因。最近格陵兰和南极冰盖质量损失率的急剧增加引起了人们的广泛关注，但较小的冰块提供了由于冰融化而导致的海平面上升总量的50-60%，而且这种贡献似乎正在增长，原因尚不清楚。

This proposal will assess changes in the mass of Canadian Arctic glaciers over the past 10-30 years and their implications for global sea level. Sea level rise is a concern because land within 1m elevation of present day sea level holds >150 million people worldwide, over $1 trillion of infrastructure, and over $944 billion/year of economic activity. Current rates of sea level change suggest a further rise of at least 0.25 m by 2100, but changes on the order of 0.8 - 2 m are conceivable. Land ice wastage accounts for most of the current sea level rise. Recent dramatic increases in the rates of mass loss from the Greenland and Antarctic ice sheets have attracted much attention, but smaller ice masses supply 50-60% of the total sea level rise due to ice melt, and this contribution seems to be growing for reasons that are poorly understood.