Quaternary

Activities at Scott base: Amundsen-Scott, South Pole, U. The true South Pole: More info about the Amundsen-Scott station and the south pole on Dana’s website. In it had a small team of US scientists drilling ice in summer but usually it is empty and only used as a refueling stop by airplanes on their way between Terra Nova and Dome C. On the picture you can see two large fuel bags and a few tents. This station is located on the high Antarctic plateau, but right where the catabatic winds begin to gather some speed while still remaining as cold as at the domes Currently there’s not much there: Nobody stays there for longer than it takes to refuel the Twin-Otter.

How are ice cores dated?

Posted on December 12, by Euan Mearns In their seminal paper on the Vostok Ice Core, Petit et al [1] note that CO2 lags temperature during the onset of glaciations by several thousand years but offer no explanation. They also observe that CH4 and CO2 are not perfectly aligned with each other but offer no explanation. The significance of these observations are therefore ignored.

It currently receives 2. There is a history of drilling various ice cores at Vostok. The main ice core, the subject of this post, was drilled in

Researchers announced that an ice core drilled in Antarctica is million-years-old, making it million years older than the former record holding core. so dating the ice by counting the.

And the increase is most marked in recent decades, up through the year Antarctica contains about feet of potential sea level rise. But at the same time, Medley explained, that snowfall is usually balanced by the loss of ice around the periphery of the ice sheet, where it melts in contact with ocean waters or slides out into sea and eventually floats away in large chunks. We already know Antarctic ice loss has been increasing, particularly in the vulnerable West Antarctic region, which has drawn massive media attention as several large glaciers have markedly retreated.

Meanwhile, this has happened even as temperatures have risen by a sharp 1 degree Celsius 1. The researchers surmised that overall, this trend of growing precipitation that they documented is probably occurring over a vast area of Antarctica — about 7 to 10 percent of the ice sheet. Indeed, the study notes that models predict an increase in snowfall accumulation atop Antarctica by the end of the century that is equivalent to 1.

Such a large amount, if not offset by increased ice losses at the periphery of Antarctica, would counter about half of current sea level rise. However, while snowfall increases across Antarctica are expected, the current research only addresses the western part of Queen Maud Land. Further research would have to show whether anything like this amount of change is happening elsewhere — and to what extent it may be offsetting ice loss from West Antarctica and other places.

Antarctica

The proposed drilling site is near the Trans-Antarctic Mountains in eastern Antarctica. NOAA Imagine an unbroken chronological record, dating back a million years, of temperature and atmospheric conditions on Earth. Such a thing could indeed exist in the form of an ancient and undisturbed Antarctic ice core, according to a recent survey. Ice cores are like a window to the past, allowing scientists to observe and document climatic and environmental changes over long time scales.

By analyzing ice cores, scientists can determine what temperatures and atmospheric conditions were like in the past, among other environmental measures. The current record for a continuous ice core is , years, which was found by drilling a core into 10, feet 3, meters of ice at a site called Dome C in East Antarctica.

Chappellaz J, Brook E, Blunier T, and Malaizé B () CH4 and δ18O of O2 records from Antarctic and Greenland ice: A clue for stratigraphic disturbance in the bottom part of the Greenland Ice Core Project and the Greenland Ice Sheet Project 2 ice cores, J. Geophys. Res., (C12), –, doi/97JC

I have reproduced the article here so that I can respond to it in context. First of all, thank you for the link to it. Before I begin, I want to mention that the dating and the article are done with the presupposition of both long ages and not only uniformitarianism but gradualism. Understanding that I do not accept these presuppositions and will be looking at the evidence presented from the standpoint of recent creation and catastrophic interruptions in history, I will approach the article from a “devil’s advocate” point of view as far as evolutionists are concerned.

The quoted article is in italics. Antarctica is the coldest, windiest, highest and driest continent on Earth. That’s right – the driest! Antarctica is a desert. The annual precipitation of snow, averaged across the continent, is about 30 centimetres, which is equivalent to about 10 centimetres of water. In some locations as little as 2 centimetres water equivalent is recorded. For those confused by metrics, 10cm is a little less than 4 inches.

Pictures of Antarctic bases

Donau There are four named major glaciations in North America. The earliest, the Nebraskan , is found on the plains of the central United States. The Kansan overlies it and extends slightly farther southwest into Kansas. The Illinoian , as the name implies, terminates primarily in Illinois.

From the author of Frozen in Time comes a technical monograph on ice core dating dealing with the origin and development of the Greenland and Antarctic ice sheets and the differences between the creation-flood and evolutionary-uniformitarian models for s: 2.

During the last ice age, tens of thousands of years ago, Greenland repeatedly warmed by about 10 degrees Celsius over just a few decades and then gradually cooled. Meanwhile the Southern Hemisphere climate stayed fairly stable, with only weak and long-delayed echoes of the temperature chaos up north. But new research shows the fierce winds circling Antarctica—an important lever on the global climate—shifted quickly in response to the Northern Hemisphere temperature spikes.

Researchers used evidence from a two-mile-long West Antarctic ice core. They have been reproduced in the most sophisticated climate models covering the ice age period. These same models also show a shift in Southern Hemisphere winds. The new study is the observational support for such a shift in winds. The Antarctic ice core shows that Southern Ocean winds shifted at the same time, or at most within a few decades, of each rapid Greenland warming event.

Antarctic air temperatures, on the other hand, are connected through the slower-moving oceans and took about two centuries to respond.

Ice core basics

National Ice Core Laboratory NICL — is a facility for storing, curating, and studying meteoric ice cores recovered from the glaciated regions of the world. It provides scientists with the capability to conduct examinations and measurements on ice cores, and it preserves the integrity of these ice cores in a long-term repository for current and future investigations. The ice cores are recovered and studied for a variety of scientific investigations, most of which focus on the reconstruction of past climate states of the Earth.

By investigating past climate fluctuations, scientists hope to be able to understand the mechanisms by which climate change is accomplished, and in so doing, they hope to develop predictive capabilities for future climate change.

A biography of the Australian continent.. Toba Eruption 74 ka BP – Direct Linking between Ice Cores from Greenland and Antarctica. About 74 ka Mt Toba in Sumatra, Indonesia erupted in one of the largest volcanic events on Earth for the last 2 million years.

Ice cores store atmospheric bubbles from a million years ago May 12, Phys. Scientists successfully complete Antarctic drilling project February 21, A new ice core successfully drilled from the Antarctica Peninsula last month January may shed new light on how the vulnerable West Antarctic Ice Sheet WAIS has responded to climate change in the past. Ice core analyses indicates atmospheric oxygen levels have fallen 0.

Krypton used to accurately date ancient Antarctic ice April 21, A team of scientists has successfully identified the age of , year-old Antarctic ice using radiometric krypton dating — a new technique that may allow them to locate and date ice that is more than a million years Core sample taken from Lake Malawi reveals 1. Ice cores yield rich history of climate change February 2, On Friday, Jan. Recommended for you Can removing carbon from the atmosphere save us from climate catastrophe?

In its recent report, it laid out four means of achieving this Oxygen could have been available to life as early as 3. Researchers create first model of how plastic waste moves in the environment November 27, A Washington State University researcher for the first time has modeled how microplastic fibers move through the environment. Wildfires bring climate’s dark forces to the stratosphere November 27, Large amounts of black carbon particles from wildfires reach the stratosphere where they can induce strong local heating and thus influence regional climate.

That West Antarctic melting couldn’t be caused by volcanoes could it?

Share 37 shares They set up a remote camp 6, feet above sea level and used snow machines with ice-penetrating radar to map the layers of ice below. The computer model of glacier flow with the data suggests that million-year-old ice is about feet above the bedrock. Researchers announced that an ice core drilled in Antarctica is 2.

This is supported by the dating of a prominent volcanic signal in other Antarctic ice cores, such as the European Project for Ice Coring in Antarctica Dome C cores .

How do ice cores work? Current period is at right. From bottom to top: Milankovitch cycles connected to 18O. From top to bottom: Ice sheets have one particularly special property. They allow us to go back in time and to sample accumulation, air temperature and air chemistry from another time[1]. Ice core records allow us to generate continuous reconstructions of past climate, going back at least , years[2].

Antarctic Ice Core Drilling