Skip to comments.1.5 Million Years of Climate History Revealed After Scientists Solve Mystery of the Deep
Posted on 08/09/2012 11:10:33 PM PDT by neverdem
A new study has successfully reconstructed temperature from the deep sea to reveal how global ice volume has varied over the glacial-interglacial cycles of the past 1.5 million years.
Scientists have announced a major breakthrough in understanding Earth's climate machine by reconstructing highly accurate records of changes in ice volume and deep-ocean temperatures over the last 1.5 million years.
The study, which is reported in the journal Science, offers new insights into a decades-long debate about how the shifts in Earth's orbit relative to the sun have taken Earth into and out of an ice-age climate.
Being able to reconstruct ancient climate change is a critical part of understanding why the climate behaves the way it does. It also helps us to predict how the planet might respond to human-made changes, such as the injection of large quantities of carbon dioxide into the atmosphere, in the future.
Unfortunately, scientists trying to construct an accurate picture of how such changes caused past climatic shifts have been thwarted by the fact that the most readily available marine geological record of ice-ages -- changes in the ratio of oxygen isotopes (Oxygen 18 to Oxygen 16) preserved in tiny calcareous deep sea fossils called foraminifera -- is compromised.
This is because the isotope record shows the combined effects of both deep sea temperature changes, and changes in the amount of ice volume. Separating these has in the past...
"Any uncertainty about Earth's climate system fuels the sense that we don't really know how the climate is behaving, either in response to natural effects or those which are man-made," Professor Elderfield added. "If we can understand how earlier changes were initiated and what the impacts were, we stand a much better chance of being able to predict and prepare for changes in the future."
(Excerpt) Read more at sciencedaily.com ...
A sensible finding.
The Industrial Revolution is merely a barely-remembered memory of an instant in time in the total life of this planet.
There is nothing we can do, short of nuclear winter, deliberately causing volcanoes around the world to erupt, or deliberately drilling holes into the crust and dropping atomic weapons down and detonating them, that will cause this planet to become unstable for us. We could continue to eject spent fossil fuels into the atmosphere for thousands of years at an ever-increasing rate, and the change will be minimal.
Besides, we can’t stop natural disasters anyway, so if the worlds wants to reclaim land, we can’t do anything about it.
My view is similar to yours. I don’t think we could do any lasting harm to the planet if we tried. Further, whenever I see ‘scientists’ in the lead of a story I tend to wonder who got the grant for the research and what were the motives.
Amazing the agitprop promoting the fraudulent cause of “climate change”. Cunning, deceitful scumbags.
I think some of this was explored in Henrik Svensmark's book, "The Chilling Stars: A Cosmic View of Climate Change".
Today it's been pushed down further into the upper mantle ~ which raises a question about where the mantle material went. I expect an article on that in the next few years ~ maybe the West Antarctic rise or something ~
Florida is explained the same way. Ice piles up on North America and the landmass sinks pushing material in the upper mantle South into the area under Florida. That raises the sea floor upward creating Florida!
Distressing news though ~ whether you have the 100,000 year cycle that started 900,000 years ago, or the older 41,000 year cycle, we are long overdue for our NEXT glaciation.
The link is not working for me...maybe the page is down?
What you want to do is just pull out the blah blah blah .com part and get to the home page. you can find the article very easy at that point.
You are not the only one for whom the link does not work.
If the records never existed in the first place, how could they reconstruct highly accurate records of changes for the last 1.5 million years? Oh, it's "climate science", never mind...
Seven or eight years ago I would have read this and delved into their techniques. Now I find it a waste of my time because their data is likely skewed by their fund- master, or their preconceived notions. I adored science up until peer- review wasn’t doing it’s job. I would say, climate- gate made me skeptical of anything... or maybe even a non- believer in man’s view of the world. Everyone has an agenda.. from the climate change folks, to the “unnecessary medical testing” crowd.
Professor Elderfield sounds like he’s parodying himself— we’re going to find out how man is changing the climate and how we can prepare for future changes by studying geological changes that took place over millions of years.
Nothing like examining data with an open mind!
It may take some time but I have faith they will be able to manipulate the findings enough to "prove" their preconceived notions of man made climate change are correct.
You forgot to qualify that with a long list of academic pedigrees. Meanwhile, back in the lab, with access to billions of dollars, years of cummulative “education” and remarkable technology they still cannot beat Einstein. To me, it seems if you truly desire to find evidence to support your beliefs, you will. Striving for God- like knowledge has been around since the garden of Eden. We know the source. How’s about we save a few billion dollars and accept life as it is, use our resources wisely, and stop chasing climate fairy tales.
...offers new insights into a decades-long debate about how the shifts in Earth's orbit relative to the sun have taken Earth into and out of an ice-age climate.The reason for the decades-long debate is, there's no uniformitarian model which can produce miles of ice in temperate climes. This is just more global warming crap, watch for it.
“My view is similar to yours. I dont think we could do any lasting harm to the planet if we tried. Further, whenever I see scientists in the lead of a story I tend to wonder who got the grant for the research and what were the motives.”
I agree with both of you, It’s all about money. One eye is always kept focused on the bank account.
Looks like some good science getting mugged in the alley of Climate Change.
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