The article indicated that scientis

The article indicated that scientists once thought the melting glaciers would add three feet to sea levels by the end of the century, but that the size of the ice sheets meant it would take centuries for them to melt entirely. Now, Pritchard indicates we have "underestimated" the sensitive ice sheets' response to temperature changes. He points to not only the warm water at the edges of the glaciers, but also the warm ocean currents contributing to the melt. Pritchard calls for greater understanding of the ice loss so researchers can better predict the future rise in sea levels.