Remote Petermann Glacier Uncorking Greenland Ice Once Thought Stable


Alex Wierbinski's picture

By Alex Wierbinski - Posted on 08 February 2019

OCEANS, ICE, WATER, & LOTS OF CHANGE

Petermann Glacier's Broken Tongue
ASTER satellite scene acquired shortly after the 2012 calving event on 2012/07/21. Right: Sentinel-2 acquisition on 2018/07/31 indicating newly developing fractures in the terminus region. (Photo Credit to NASA & EU: ASTER; Sentinel-2)
Left: ASTER satellite scene acquired shortly after the 2012 calving event on 2012/07/21. Right: Sentinel-2 acquisition on 2018/07/31 indicating newly developing fractures in the terminus region. (Photo Credit to NASA & EU: ASTER & Sentinel-2)

  

Cracks herald the calving of a large iceberg from Petermann Glacier,
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, February 6, 2019.

MAIN POINTS

Petermann Cracked
“Cracks in the floating ice tongue of Petermann Glacier in the far northwest reaches of Greenland indicate the pending loss of another large iceberg.”

Accelerating Petermann
“...the glacier's flow rate has increased by an average of 10 percent since the calving event in 2012...”

Heralding More Acceleration
“...if these ice masses truly break off, Petermann Glacier's flow rate will likely accelerate further and transport more ice out to sea, with corresponding effects on the global sea level.”

Petermann Glacier in 2003 before Calving and Cracking
Petermann Glacier, Greenland, observed by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite on July 5, 2003, image by Jesse Allen and Robert Simmon.

Petermann Glacier, Greenland, observed by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite on July 5, 2003, image by Jesse Allen and Robert Simmon. Linked to NASA article about Petermann Glacier.

How
“...confirm that the loss of a large iceberg in August 2012 is what triggered the acceleration. "On their way to the sea, the glacier's ice masses rub along the rock walls that enclose the fjord to the left and right. If a major iceberg breaks away from the end of the glacier's tongue, it will reduce the tongue's overall length, and with it, the route along which the ice masses scrape against the stone. This in turn limits the walls' braking effect, so that the glacier begins flowing faster."

Faster and Faster
“...a new calving event would produce a similar acceleration.”

New Age in Northwest Greenland
“...the experts consider the acceleration of Petermann Glacier to be an important signal.”

New Age of Ice Instability
“Unlike the glaciers in southeast and southwest Greenland, those in the island's northern reaches have remained largely stable; now that appears to have changed. ”

Remote Far Northern Location of Petermann Glacier
Greenland Map locating remote, far Northern location of Petermann Glacier, by Uwe Dedering.

Greenland Map by Uwe Dedering, Wiki

Current Gross Effect
“Greenland's glaciers are now losing a forth more ice in the form of calving events than in the comparison period (1960 to 1990).”

 Greenland as Percent of Total Annual Sea level Rise

“The total annual global sea-level rise is ca. 3.3 millimetres, of which the loss of ice on Greenland is currently contributing ca. 0.7 millimetres.”

 

 

The Cutting Edges of Arctic Climate Research:

The Latest
Greenland Ice

Melting Ice, Glaciers, & Ice Caps: Estimating Dates for Reaping the Whirlwind(s)

Greenland Melting Four Times Faster Than 2003

2019 Greenland Melting Expanding & Accelerating Rapidly

West Greenland Melting: Fastest Seen in Modern Historical Record

 

 

2018 Arctic Ice Summer Minimum

ECO-CRASHING NEWS: ARCTIC ICE SUMMER MINIMUM

 

 

Recent Arctic Research

The End of Cold, 2018: Arctic Mountain Glaciers Melting Rapidly

 

Saying Goodbye: Arctic Ice Melting Reinforcement

 

Climate Change News: Arctic Out of Balance, Arctic Ocean Rapidly Changing

 

Arctic Melting Exposing Ancient Terrain Unseen for 40,000 Years


ARCTIC ICE, 2018: Beauford Sea Instability Points to Arctic Ocean Transformation

 

Rapid Arctic Warming, 2019: Unique Arctic Atmosphere & Local Amplification Cited

 

 

Secondary Effects-Related Research

Eco Crash News: Furthest Northern Arctic Permafrost to Melt

 

PERMAFROST DISASTER GROWING ALMOST EVEYWHERE

 

Melting Ice Sheets Release Tons of Methane into the Atmosphere

 

Arctic Plants are Getting Rapidly Taller

 

 

 

Warm Arctic Chills Dixie? Warming Arctic Channels Frigid Air South

 

What Happens when You Grow Too Big for your Britches? The Arctic Vortex Weakens!

 

Climate Change News: Melting Sea Ice brings California Droughts

 

Polar Vortex Splits Under Warming Stratosphere

 

Polar Vortex Sliding off Top of Planet, Arctic Weather Plunges into North America

 

 

Big Picture

Arctic Report Card Documents 'Cascading Effects' Of Warming Ocean Temperatures

 

Ice News: Traditional Arctic Weather Cycle Gone, Life & Weather Consequences just getting started

 

Two New Climate Analysis: Short Term, A New Form of Climate Analysis. Long Term: Crashing Through Tipping Points

 

WATCH THE ARCTIC DISINTEGRATE: Fifteen Year Arctic Video & How to Use MODIS

 

 

Need I say more?

Yes. About Antarctica.

The same, "understanding," we had about the Petermann Glacier and NW Greenland, that they are, "stable," and will not melt under our global warming, are as wrong as our belief that East Antarctica was stable, and would not budge. Until it did...

The Oldest, Coldest Things on this Planet are Moving

Totten and Four East Antarctic Glacial Neighbors are Moving

 

 

Views from Space

ASTER
Advanced Spaceborne Thermal Emission and Reflection Radiometer

 

 

 

News of Oceans, Ice, Water & Fish, Winter & Spring, 2019

 

 

February 2019 News of Man & Nature

 

 

 

 

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Petermann Glacier, Petermann, Greenland, Glaciers, ice tongue, ice, cracking, melting, Aster Satellite

 

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