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).
...
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 ...
When did science become “correlation implies causation?”
Sigh.
Yeah, they must have missed my 1976 paper on the subject which I co-authored with Captain Obvious and N. O. Kidding of the Norwegian Ice Institute.
Adopt Agenda 21...or else....
Not about sea ice per se, but about climate change and sea levels.
Google great barrier reef and you will get nothing but panic. The reef is dying. Chlorine and acid are destroying our reef. What can be done???? CATASTROPHE!
Except, it has happened before. The reef was high and dry and dead (supposedly) thousands of years ago. How can that be? The reef we are so worried about was dead before. How is it that it exists today? HMMMMMMMM?
Excerpt from an article.
“Professor Webb said rising sea levels inundated the current continental shelf of Queensland after the end of the last great Ice Age (around 18,000 years ago).
“Before that, what is now the Great Barrier Reef was high and dry and consisted of a series of limestone tablelands complete with trees, grasses and soils,” he said.
“Our new samples allow us to see what coral communities first colonised those tablelands as they were inundated by the sea around 9,000 years ago.”
Read more at: http://phys.org/news/2015-10-future-great-barrier-reef.html#jCp
There is nothing new under the sun
Ice responds to changes in temperature.
Who knew ???
And confiscating your guns.
Cause or effect? Leading, coincident, or lagging indicator?
If those “scientists” can’t document through personal on-site observation and scientific measurement of the sea ice 90,000 years ago, we’ll just have to assume that the data was just SWAG and not scientific at all.
Didn’t he provide a welcome relief from Houston’s summer heat?
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