Posted on 08/16/2016 1:44:10 PM PDT by BenLurkin
Expansion and retreat of sea ice varied consistently in pace with rapid climate changes through past 90,000 years, a new study in Nature Communications shows.
"The Arctic sea ice responded very rapidly to past climate changes. During the coldest periods of the past 90,000 years the sea ice edge spread relatively quickly to the Greenland-Scotland Ridge, and probably far into the Atlantic Ocean." says first author Ulrike Hoff, a researcher at Centre for Arctic Gas Hydrate, Environment and Climate (CAGE).
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Hoff and colleagues studied the past distribution of sea ice, in the so far longest existing sea ice record in a marine sediment core. The core was retrieved from 1200m water depth from the ocean floor of the Nordic Seas, just off the Faroe Islands. The core represents 90,000 years of sediment layers, and it is by studying those layers that scientist can reveal the changes in sea ice and past climate.
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Sea ice retreated abruptly during warming events; spread rapidly during cooling phases, and became near perennial and perennial during cold periods and Heinrich events, the study states.
A few specific species of diatoms use sea ice as habitat; they are attached to the ice itself. If you dive under the ice you can see them as a golden brown coating underneath. But being algae, they depend on the suns rays that penetrate through the ice for photosynthesis. If the ice is too thick, the sun does not reach them, and the production falls rapidly as a result.
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Rasmussen points out that the sea ice profoundly influences the behavior of ocean currents, which in turn influence air temperature.
For example permanent sea ice cover is not good for deep-water formation, a process that essentially powers what is colloquially known as The Gulf Stream.
(Excerpt) Read more at phys.org ...
I didn’t know they made SUV’s out of sea ice back then.
What? Climate has changed before? I thought that now was the only time the climate ever changed...I’m such a confused little snowflake.
Why are they burning wood? That’s not sustainable. They should be using solar cells.
Those cavemen probably burned-down their cave.
Is this like the chicken or the egg question??
Sure. Whatever. By definition....
When you're with the Flintstones you'll have a yabba dabba doo time a dabba doo time You'll have a gay old time.
The next Ice Age is overdue. Pay your fines.
Is that Fred and Barney???
Wilma was gay?
Yes
And no
So, sea ice goes south during ice ages and retreats north during the warm cycles? Who knew? Good thing we have experts to find out stuff like this.
But fortunately all of this can be fixed by raising taxes!
So the take away from this study is that ice melts when it’s warm and forms when it’s cold. Got it!
And that it accelerates the cooling and warming events.
Unpossible.
You ever tried to burn a solar cell? Wood is a lot easier to kindle.
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