Tipping Point: Greenland ice melting four times faster than in 2003

Greenland is melting faster than scientists previously thought — and will likely lead to faster sea level rise — thanks to the continued, accelerating warming of the Earth’s atmosphere, a new study has found.

Read ScienceDaily summary here

Michael Bevis el al., “Accelerating changes in ice mass within Greenland, and the ice sheet’s sensitivity to atmospheric forcing,”  PNAS (2019).  www.pnas.org/cgi/doi/10.1073/pnas.1806562116

…The key finding from their study: Southwest Greenland, which previously had not been considered a serious threat, will likely become a major future contributor to sea level rise.

“We knew we had one big problem with increasing rates of ice discharge by some large outlet glaciers,” he said. “But now we recognize a second serious problem: Increasingly, large amounts of ice mass are going to leave as meltwater, as rivers that flow into the sea.”

The findings could have serious implications for coastal U.S. cities, including New York and Miami, as well as island nations that are particularly vulnerable to rising sea levels.

….”The only thing we can do is adapt and mitigate further global warming — it’s too late for there to be no effect,” he said. “This is going to cause additional sea level rise. We are watching the ice sheet hit a tipping point.”