Glacier melt poses multiple threats around the world

Subject

Melting glaciers.

Significance

The International Centre for Integrated Mountain Development, in Nepal, released a report in February highlighting the long-term impact of increasing glacial melt in the Himalayas and the risks that climate change will pose to fragile mountain ecosystems and societies. Similar issues affecting glaciers in the Andes have also raised concerns about water security. Venezuela’s last glacier, Pico Humboldt, is no longer a significant source of water and is expected to disappear completely by 2021. Longer-term warnings have been issued regarding Ecuador’s Carihuairazo glacier.

Impacts

• Impacts of reduced glacial melt will be greatest on areas closest to glaciers, but distant areas downstream will also be affected.
• Effective adaptation responses will rely on increased coordination among governance institutions, including across national boundaries.
• Increased water stress in agricultural areas will risk food insecurity and exacerbate migration pressures internally and internationally.
• Demographic changes and development efforts suggest that water demand will increase, putting further pressure on supplies.