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Consistent dating for antarctic and greenland ice cores

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In , inside a covert U. Piece by piece, they extracted an ice core 4 inches across and nearly a mile long. At the very end, they pulled up something else — 12 feet of frozen soil. The frozen soil was examined, set aside and then forgotten. Half a century later, scientists rediscovered that soil in a Danish freezer.
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Skeptics put the freeze on NASA 'hot air' about Greenland ice

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(PDF) Methods for Dating Ice Cores | Melanie Goral -

An ice core is a core sample that is typically removed from an ice sheet or a high mountain glacier. Since the ice forms from the incremental buildup of annual layers of snow, lower layers are older than upper, and an ice core contains ice formed over a range of years. Cores are drilled with hand augers for shallow holes or powered drills; they can reach depths of over two miles 3. The physical properties of the ice and of material trapped in it can be used to reconstruct the climate over the age range of the core. The proportions of different oxygen and hydrogen isotopes provide information about ancient temperatures , and the air trapped in tiny bubbles can be analysed to determine the level of atmospheric gases such as carbon dioxide.
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Surprising pulses of ancient warming found in Antarctic ice samples

Figure 1 Scientists measure ice cores from deep drilling sites on the ice sheet near Casey station Photo by M. Antarctica is the coldest, windiest, highest and driest continent on Earth. That's right - the driest! Antarctica is a desert.
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Catherine Ritz is a French Antarctic researcher, best known for her work on ice sheets and their impact on sea level rise. Ritz is a climatologist and geographer [1] known especially for her contributions to climate change research. Among Ritz's more high-profile contributions is an article published in the journal Nature in December The article, based on research led by Ritz and Tamsin Edwards from The Open University , created models based on satellite data to examine the potential impact of Antarctic sea ice collapse on global sea levels. Using more comprehensive methods than those used in previous studies, [7] the team found that the collapse of Antarctic ice sheets would have serious consequences for sea level rise up to a half-meter by in a high-emissions scenario , [8] but that the effects likely would not be as dramatic as other high-profile studies had predicted.
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