Research press release


Nature Geoscience

Canada’s disappearing glaciers



Garry Clarkeたちは、カナダ西部に対して、氷の流れの物理的性質を明示的にシミュレーションする高分解能地域的氷河モデルを開発した。彼らは全球気候モデルの集合から得られた気候変動シナリオを用い、海岸の氷河は氷の体積が大きく減少してもおそらく残ることができるが、内陸の氷河は完全に消失する可能性が高いことを見つけた。

関連するNews & ViewsでAndreas Vieliは、「この急速な氷河後退速度は、地域的な水文学的性質、水資源、および将来の地形と密接に関連する」と記している。

Glaciers in western Canada are projected to lose 70% of their ice volume by 2100, relative to 2005, reports a study published online in Nature Geoscience. According to the simulations, the peak in meltwater contribution to rivers and streams from glacier wastage will occur between 2020 and 2040, followed by decades of declining flow.

Mountain glaciers around the world are melting as a result of climate warming. These glaciers store substantial amounts of water, and their loss could therefore affect water availability.

Garry Clarke and colleagues developed a high-resolution regional glaciation model for western Canada that explicitly simulates the physics of ice flow. Using climate change scenarios from an ensemble of global climate models, they found that glaciers on the coast will probably survive with significantly reduced ice volume, while inland glaciers are likely to vanish entirely.

In an accompanying News & Views, Andreas Vieli writes, “This rapid rate of glacier recession has implications for regional hydrology, water resources and the future landscape.”

doi: 10.1038/ngeo2407


メールマガジンリストの「Nature 関連誌今週のハイライト」にチェックをいれていただきますと、毎週各ジャーナルからの最新の「注目のハイライト」をまとめて皆様にお届けいたします。