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Dating ice cores

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Ice core , long cylinder of glacial ice recovered by drilling through glaciers in Greenland, Antarctica , and high mountains around the world. Scientists retrieve these cores to look for records of climate change over the last , years or more. Ice cores were begun in the s to complement other climatological studies based on deep-sea cores, lake sediments, and tree-ring studies dendrochronology. Since then, they have revealed previously unknown details of atmospheric composition , temperature, and abrupt changes in climate. Abrupt changes are of great concern for those who model future changes in climate and their potential impacts on society. Ice cores record millennia of ancient snowfalls, which gradually turned to crystalline glacier ice.
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Ice core | geology | Britannica

An influential current system in the Atlantic Ocean, which plays a vital role in redistributing heat throughout our planet's climate system, is now moving more slowly than it has in at least 1, years. Scientists believe that part of this slowing is directly related to our warming climate , as melting ice alters the balance in northern waters. Its impact may be seen in storms, heat waves and sea-level rise. And it bolsters concerns that if humans are not able to limit warming, the system could eventually reach a tipping point, throwing global climate patterns into disarray. The Gulf Stream along the U. It was made famous in the film " The Day After Tomorrow ," in which the ocean current abruptly stops, causing immense killer storms to spin up around the globe, like a super-charged tornado in Los Angeles and a wall of water smashing into New York City. As is the case with many sci-fi movies, the plot is based on a real concept but the impacts are taken to a dramatic extreme.
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Record-shattering 2.7-million-year-old ice core reveals start of the ice ages

Why are soda and ice cream each linked to violence? This article delivers the final word on what people mean by "correlation does not imply causation. Soda and ice cream are linked to violence.
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Ice cores are cylinders of ice drilled out of an ice sheet or glacier. Most ice core records come from Antarctica and Greenland, and the longest ice cores extend to 3km in depth. The oldest continuous ice core records to date extend , years in Greenland and , years in Antarctica.
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