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Clearer View of Greenland Ice Melting Potentials

Clearer View of Greenland Ice Melting Potentials


Alex Wierbinski's picture

By Alex Wierbinski - Posted on 19 June 2019

 

OCEANS, ICE, WATER, & FISH

Study Predicts More Long-Term Sea Level Rise from Greenland Ice
Study Predicts More Long-Term Sea Level Rise from Greenland Ice, NASA / Cindy Starr.
"The researchers ran their model 1500 times, testing a variety of land, ice, ocean and atmospheric variables to see how they affected ice melt rate - including three possible future climate scenarios (from left to right: low, medium, and high emissions out to the year 2300). Credits: NASA / Cindy Starr."

 

Clearer View of Greenland Ice Melting Potentials

Study Predicts More Long-Term Sea Level Rise from Greenland Ice,
NASA/Goddard Space Flight Center, June 19, 2019.

MAIN POINTS

Data from Ice Bridge Observations
“NASA’s space and airborne campaigns, like IceBridge, have fundamentally transformed our ability to try and make a model mimic the changes to the ice sheet.”

Fancy New Model
"In the next 200 years, the ice sheet model shows that melting at the present rate could contribute 19 to 63 inches to global sea level rise..."

Uh-Oh
"These numbers are at least 80 percent higher than previous estimates, which forecasted up to 35 inches of sea level rise from Greenland's ice."

Three Scenarios for Greenland Ice
1>"...no reduction of emissions, the study found that the entire Greenland Ice Sheet will likely melt in a millennium, causing 17 to 23 feet of sea level rise."

2>"In the scenario where emissions are stabilized by the end of the century rather than continue to increase, the model shows ice loss falling to 26-57 percent of total mass by 3000."

3>"Drastically limiting emissions so they begin to decline by the end of the century could limit ice loss to 8-25 percent."

Higher Melt Rate Explained
"As ocean waters have warmed over the past 20 years, they have melted the floating ice that shielded the outlet glaciers from their rising temperatures. As a result, the outlet glaciers flow faster, melt and get thinner, with the lowering surface of the ice sheet exposing new ice to warm air and melting as well."

Bottom Line
"If we continue as usual, Greenland will melt."

New Survey & Powerful Supercomputers
"NASA's Operation IceBridge is the world's largest airborne survey of polar land and sea ice."

"...model runs were performed on high-performance supercomputers atNASA’s Ames Research Centerand the University of Alaska Fairbanks..."

 

VIDEO
Modeling the Future of the Greenland Ice Sheet,
Goddard Media Studios.

 

 

Operation IceBridge

 

Recent Greenland Ice Research

Feb 2019
Remote Petermann Glacier Uncorking Greenland Ice Once Thought Stable

Jan 2019
2019 Greenland Melting Expanding & Accelerating Rapidly

Dec 2018
Greenland Ice Sheet Melt 'Off the Charts' Compared with past Four Centuries

March 2018

West Greenland Melting: Fastest Seen in Modern Historical Record

 

 

 

News of Oceans, Ice, Water, & Fish

June 2019 Nature News

 

 

 

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Greenland, ice, melt, supercomputer, models, predict, 80%, more, melt, sea level rise

 

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