Dr. Jim Hansen
Credit: AP Photo/Dennis Cook

James Hansen and 16 leading climate experts have written a must-read discussion paper on what humanity risks if it can’t keep total global warming below 2°C (3.6°F). The greatest risk they identify is “that multi-meter sea level rise would become practically unavoidable.”

This is warning everyone should heed — not just because Hansen’s co-authors include some of the world’s top sea-level rise experts, such as Eric Rignot and Isabella Velicogna, but also given Hansen’s prescience on climate change dating back more than three decades.

In 1981, Hansen led a team of NASA scientists in a seminal article in Science, “Climate Impact of Increasing Atmospheric Carbon Dioxide.”

They warned: “Potential effects on climate in the 21st century include the creation of drought-prone regions in North America and central Asia as part of a shifting of climatic zones, erosion of the West Antarctic ice sheet with a consequent worldwide rise in sea level, and opening of the fabled Northwest Passage.”

Wow. A 35-year-old peer-reviewed climate warning that […]