Posted on 06/11/2018 4:13:13 PM PDT by SunkenCiv
Although researchers have long known that the last two interglacial periods experienced warming in the Arctic... Just beyond the northwest edge of the vast Greenland Ice Sheet, Northwestern University researchers have discovered lake mud that beat tough odds by surviving the last ice age. The mud, and remains of common flies nestled within it, record two interglacial periods in northwest Greenland. Although researchers have long known these two periods -- the early Holocene and Last Interglacial -- experienced warming in the Arctic due to changes in Earth's orbit, the mix of fly species preserved from these times shows that Greenland was even warmer than previously thought... Greenland's ice sheet, which covers 80 percent of the Arctic country and holds enough ice to equal 20 feet of global sea level... hovers in the 30s and low 40s Fahrenheit and weathers snowstorms in summer. But average summer temperatures in the early Holocene (8,000 to 11,000 years ago) and Last Interglacial (116,000 to 130,000 years ago) climbed well into the 50s. During the Last Interglacial, global sea levels increased by 15 to 30 feet, largely due to thinning of Greenland and Antarctica's ice sheets. But now Northwestern's team believes northern Greenland's ice sheet experienced stronger warming than previously thought, which could mean that Greenland is more responsible for that sea-level rise... Discovering this mix of insects means northwest Greenland's average July during the last two interglacial periods most likely climbed above 50 degrees and possibly into the high 50s during the Last Interglacial. This confirms controversial geological records constructed from ice cores taken nearby, which also indicated significant warming during these time periods.
(Excerpt) Read more at sciencedaily.com ...
Settled science. snort.
At last I know...and to think of all the hours I’ve sat around pondering, wondering, what ancient Greenland’s climate was...it’s worried me in to gray hair.
Now, I can rest easy. whew!
/s
How thick would the Greenland ice cap have to be to melt and raise sea levels 30 feet? (the average thickness is 6,600–9,800 ft)
It doesn’t add up.
Actually, it does. Using your numbers, the sea level rise would be about 38 feet (assuming an average 8,000 foot thickness for the Greenland ice cap.
Eemian is one of the many terms to describe the previous interglacial.
https://en.wikipedia.org/wiki/Eemian
“experienced warming in the Arctic due to changes in Earth’s orbit...Try fixing that!”
What, are you denying anthropogenic orbit change? It’s settled science!
My pleasure!
Thanks for posting, and be sure to check out the links in post #15.
Either term can be used.
It's like saying Obama, or the president before Trump.
~~~shudder~~~
"Northwest Greenland might feel really remote, but what happens to that ice sheet is going to matter to everyone in New York City, Miami and every coastal city around the world," said Yarrow Axford,
Mr.Axford is touched this ocean rise only exist where parameters remain static.
I like to point out that the last refuge for dinosaurs in the world was Alaska. Their age lasted from 252 million to just a mere 66 million years ago.
But this suggests that other Arctic locations might have also been warm enough to support such reptiles.
Actually, more than 400 years.
What causes the Earth's orbit to change? (And then change back?) Not thinking so.
I don't buy the idea in the first place, and yes, I'm aware that the idea is popular. One reason for the popularity is to show how slight and gradual natural changes can be easily outdone by careless selfish humans using too much Aquanet.
[singing] Eemian, I gotta straighten my face, This mellow thighed chick just put my spine out of place
http://www.freerepublic.com/tag/chandlerwobble/index?tab=articles
There were also dinos in the Antarctic, and the climate there was temperate no longer ago than three million years.
But if it is warmer, then more water would be in the atmosphere. Thus sucking up much of the change.
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