Sea level rise accelerating per 25 years of observational satellite dataLeave a Comment
- February 12, 2018 University of Colorado at Boulder read full ScienceDaily article here
Global sea level rise is not cruising along at a steady 3 mm per year, it’s accelerating a little every year, like a driver merging onto a highway, according to a powerful new assessment led by CIRES Fellow Steve Nerem. He and his colleagues harnessed 25 years of satellite data to calculate that the rate is increasing by about 0.08 mm/year every year — which could mean an annual rate of sea level rise of 10 mm/year, or even more, by 2100….
…Congress may be catching on, said Rob Moore, a policy analyst with the Natural Resources Defense Council. Disaster relief provisions in the federal spending bill approved on Friday include significant funding to make communities more resilient to the long-term threat of climate change….
….Some scientists also warn that a rapid disintegration of Antarctica’s ice sheets could push sea level up much faster and higher, by as much as 4 to 10 feet by 2100. “The largest uncertainty is really Antarctica,” said Ingo Sasgen, a climate researcher at the Alfred Wegener Institute in Germany. “The big question for planners is how to deal with the possible extremes.”
The last time Earth was as warm as it is now was about 125,000 years ago, and we know sea level was 6 meters higher than it is today, Nerem said. “The big question is, now long will it take to get there.”
R. S. Nerem, B. D. Beckley, J. T. Fasullo, B. D. Hamlington, D. Masters and G. T. Mitchum. Climate-change–driven accelerated sea-level rise detected in the altimeter era. PNAS, 2018 DOI: 10.1073/pnas.1717312115