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lancer container lines limited (lancer) vs yyy ✌️【Career Goals】✌️ Free expert predictions on stock trends and real-time data to help you make informed decisions and grow your wealth steadily. The team has sliced the core into 3.2-foot (1-meter) pieces stored in insulated boxes so they may be studied, said Barbante, professor at Italy’s Ca’ Foscari University of Venice and senior associate member of the Institute of Polar Sciences of the National Research Council of Italy.
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“The air bubbles trapped within the ice core provide a direct snapshot of past atmospheric composition, including greenhouse gas concentrations like carbon dioxide and methane,” Barbante said via email. “By analyzing these, we can reconstruct how Earth’s climate responded to changes in climate forcing factors, such as solar radiation, volcanic activity, and orbital variations. This data helps us understand the intricate relationship between greenhouse gases and global temperature over hundreds of thousands of years and now down to 1.2 million year(s) and hopefully beyond.”
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lancer container lines limited (lancer) vs yyy ✌️【Career Goals】✌️ Get precise stock market predictions and free access to real-time market data for efficient decision-making and portfolio growth. The program builds on the goals of the initial EPICA project that took place from 1996 to 2008. During that time, researchers drilled a deep ice core that unearthed links between climate and atmospheric greenhouse gases over the past 800,000 years. The core collected during the latest campaign marks a new milestone, creating a continuous record of Earth’s climate that dates back even further.
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“We needed a Goldilocks site — ice thick enough for a well-resolved climate record at the greatest depth, but not too thick that the oldest ice had already melted away,” said Dr. Robert Mulvaney, a glaciologist and paleoclimatologist at the British Antarctic Survey.
“This can happen when the heat escaping from the Earth’s mantle is trapped by a thick insulating blanket of ice. If the ice is too thick, we can lose the lowest and oldest layers of ice to melting,” Mulvaney said. “That’s why we spent a lot of effort in surveying the candidate areas to find the right site before drilling started.”
Little Dome C is high on the central Antarctic plateau, reaching an altitude of 10,498 feet (3,200 meters) above sea level, presenting numerous challenges. The team had to work to prevent drill failures and ensure that the electromechanical core drill was progressing through the ice layers. Each meter of ice can contain as many as 13,000 years of climate data, said Julien Westhoff, chief scientist in the field and postdoctoral researcher at the University of Copenhagen in Denmark.
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“It was exciting to see the ice age as we drilled deeper, and especially when we knew we were drilling ice older than the EPICA record, which ended at 800,000 years ago,” the British Antarctic Survey’s Mulvaney said in a statement. “This record of 1.2 million years will give us several 41,000-year glacial cycles to compare with the more recent data from the original EPICA core.”
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“This transition remains a scientific mystery, particularly regarding the role of greenhouse gases and ice sheet dynamics,” he said. “The Beyond EPICA ice core offers an unprecedented opportunity to directly measure atmospheric conditions during this pivotal period, potentially unlocking answers about why this transition occurred and how it shaped our planet’s climate system.”
During the Mid-Pleistocene Transition, ice ages became longer and more intense, leading to a drop in temperature and dry climatic conditions. The global population also dropped to about 1,280 reproducing individuals between 930,000 and 813,000 years ago and then remained that small for about 117,000 years, according to a 2023 study published in thejournal Science. The study authors argue this event “brought human ancestors close to extinction,” butothers are more skeptical.
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Ice cores contain layers of snowfall that have been compressed over time, trapping air bubbles and particles that can be analyzed to reveal how Earth’s temperature and atmosphere have shifted.
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“Antarctic ice cores are like Rosetta Stones,” said Jim White, Craver Family Dean of the College of Arts and Sciences at the University of North Carolina at Chapel Hill, in an email. “They are unique in that they speak the language of temperature as well as the language of (carbon dioxide) levels, allowing us to see how these two key climate variables interact.”
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“We have to find other places in Antarctica where we can retrieve continuous climate record(s) similar to the one we are studying,” he said.
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