Earth’s Mantle Affects Sea Level Rise Estimates
2013 05 17

By Becky Oskin | OurAmazingPlanet



A prehistoric shoreline runs along the eastern edge of North America; scientists have pointed to it as evidence that much of Antarctica melted 3 million years ago. But new research suggests this shoreline is actually about 30 feet (10 meters) lower than previously thought, meaning less ice melted than suspected.

The shoreline, which should be flat, also swoops up and down the East Coast like a set of wave crests, reflecting tugging and pushing by Earth’s mantle, the layer of viscous rock leisurely oozing underneath the crust, according to the study, published today (May 16) in the journal Science Express.

The finding shows that scientists have to be careful when looking at Earth for evidence of past sea level changes from the planet’s cycles of glacial advance and retreat.

"You simply can’t go somewhere and look at the height of the shoreline and infer anything about the amount of water in the oceans or the height of sea level without already knowing an awful lot about what the mantle is doing," said David Rowley, lead study author and a geologist at the University of Chicago.


The East Coast shoreline as it appeared 3 million years ago. The shoreline has been adjusted 82 feet (25 meters) relative to today.

This interplay between the surface elevation of the Earth and the mantle is called dynamic topography. The cliffs of the Great Australian Bight and the tall height of the African continent are also attributed to the mantle’s effects on topography. Even the Appalachian Mountains may owe their enduring height to the mantle.

[...]

Read the full article at: news.yahoo.com




Related Articles
Sea levels "will continue rising regardless of greenhouse gas treaties", warn scientists
Sea Level Research (2010)
Rise of sea levels is "the greatest lie ever told"
New sat data shows Himalayan glaciers hardly melting at all
World misled over Himalayan glacier meltdown
Climate Paradox: Longer Antarctic Melt Season May Mean Less Global Warming?
Antarctica warmth ’unusual, but not unique’
Amount of ice in Bering Sea reaches all-time record
Arctic freshening not due to ice melt after all, says NASA


Latest News from our Front Page

Harvard Professor Noel Ignatiev talks about how to end the White race
2014 09 02
There was some doubt earlier this week as to the validity of the claim in Kevin MacDonald’s article The War Against Whites. We’ll we found something for your guys: Source: youtube.com Not that this is the only one, far from it, this is just a small sample of the barrage of conferences and a well educated cultural marxists that have set their goals ...
Secret underground tunnels of ancient Mesopotamian cult revealed under Ani ruins
2014 09 01
For the first time in history, the academic world is paying attention to the spectacular underground world of Ani, a 5,000-year-old Armenian city located on the Turkish-Armenian border. Hurriyet Daily News reports that scientists, academics, and researchers have just met at a symposium in Kars titled ‘Underground Secrets of Ani’ to discuss the city’s underground world mentioned in ancient ...
A Government Vision Of The Future That Isn’t That Great
2014 09 01
Here’s a report by the UK Ministry of Defense, a document that they’re not hiding - it’s not classified. In fact, they WANT you to read it: the Global Strategic Trends 2045. For your convenience, they’ve even produced a handy video about their dire predictions: They present a warning call for how things are going to be bad in the future. ...
Bad Memories Turned to Happy Ones in Mice Brains
2014 09 01
Memories are often associated with emotions, and these feelings can change through new experiences and over time. Now, using light, scientists have been able to manipulate mice brain cells and turn the animals’ fearful memories into happy ones, according to a new study. Memories are encoded in groups of neurons that are activated together or in specific patterns, but it is ...
CIA MKULTRA: they intended to use drugs for “everything”
2014 09 01
Drugs to transform individuals…and even, by implication, society. Drug research going far beyond the usual brief descriptions of MKULTRA. The intention is there, in the record. A CIA document was included in the transcript of the 1977 US Senate Hearings on MKULTRA, the CIA’s mind-control program. The document is found in Appendix C, starting on page 166. It’s simply labeled “Draft,” dated 5 May ...
More News »