Latest news with #BeyondEPICA
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First Post
6 days ago
- Science
- First Post
Why 1.5-million-yr old ice is set to be melted in the UK
Ice, which is thought to be around 1.5 million years old, was retrieved from deep inside the Antarctic ice sheet. It has been brought to the United Kingdom where researchers hope that the it will shed some light on Earth's previous climate cycles read more The Beyond EPICA cores were collected from Dome C in East Antarctica over several years. Image courtesy: PNRA:IPEV Ice that is 1.5 million years old is set to be melted down in the UK. The ice, which is said to be the planet's oldest, was retrieved from deep inside the Antarctic ice sheet. It has been brought to the United Kingdom for scientists to observe and examine. But what do we know about it? Why it is being melted down in the UK? What we know The ice was retrieved from a depth of 2,800 metres underwater in East Antarctica. The region, known as Little Dome C, is located on the upper reaches of the Antarctic plateau. STORY CONTINUES BELOW THIS AD The mission is part of the Beyond EPICA (European Project for Ice Coring in Antarctica) Oldest Ice project. The team comprises researchers from 10 European nations and a dozen institutions. Those behind the mission, which was launched in 2019 and funded by the European Commission, want to decode Earth's climate history when it comes to ice core records. Thus far, when it comes to examining ice cores, we have records for around 800,000 years. They aim to extend this as far back as 1.5 million years. Millions of dollars were spent on extracting the ice cores from the Antarctic ice sheet. The cores were then divided into 1 metre blocks and shipped to the UK. They were then taken to Cambridge in a cold van. Some of it is currently being stored at the British Antarctic Survey in Cambridge. 'To hold that in my carefully gloved hands and be very careful not to drop the sections - it was an amazing feeling,' engineer James Veale told BBC. Scientists will use an instrument called the inductively coupled plasma mass spectrometer (ICPMS) to examine the ice for nearly two dozen elements and trace metals. STORY CONTINUES BELOW THIS AD Dr Liz Thomas holding the oldest ice core. Image courtesy: Image courtesy: PNRA:IPEV Two institutions in Germany and Switzerland also have received chunks of the ice core. The ice will be melted slowly over the next few weeks and examined in a state-of-the-art lab next door. The ice cores may contain carbon dioxide, methane or dust particles that can be examined as well as rare earth elements, sea salts and marine algae called diatoms. They will also reveal details about wind patterns, temperatures, and sea levels more than a million years ago. Why is it being melted down? Scientists hope the examination of the ice will reveal the secrets of Earth's previous climate cycles. The results may perhaps explain why sea levels rose and the ice sheets shrank between 800,000 and 1.5 million years ago. 'The project is driven by a central scientific question: why did the planet's climate cycle shift roughly one million years ago from a 41,000-year to a 100,000-year phasing of glacial-interglacial cycles?' Dr Liz Thomas, head of the ice cores team at the British Antarctic Survey told Sky News. Essentially, the Earth had been transitioning from warmer eras to cold ages roughly every 41,000 years. STORY CONTINUES BELOW THIS AD However, during the Mid-Pleistocene Transition era, around 800,000 to 1.2 million years ago, this transition suddenly shifted to every 100,000 years. We still don't understand why. 'This is a completely unknown period of our Earth's history', Thomas told BBC. Many researchers consider this to be one of the most puzzling and exciting secrets that science has yet to uncover. They also think examining Earth's past will help give human beings a further understanding of the future potential impact of climate change. 'Our climate system has been through so many different changes that we really need to be able to go back in time to understand these different processes and different tipping points,' Thomas told BBC. 'By extending the ice core record beyond this turning point, researchers hope to improve predictions of how Earth's climate may respond to future greenhouse gas increases', Thomas added. The rise of sea-levels is a major concern around the world in the 21st Century. STORY CONTINUES BELOW THIS AD With inputs from agencies
Sky News
6 days ago
- Science
- Sky News
Antarctica's oldest ice arrives in UK for analysis on climate shifts
Antarctica's oldest ice has arrived in the UK for analysis which scientists hope will reveal more about Earth's climate shifts. The ice was retrieved from depths of up to 2,800 metres at Little Dome C in East Antarctica as part of an international effort to "unlock the deepest secrets of Antarctica's ice". The ice cores - cylindrical tubes of ancient ice - will be analysed at the British Antarctic Survey (BAS) in Cambridge, with the ultimate goal of reconstructing up to 1.5 million years of Earth's climate history, significantly extending the current ice core record of 800,000 years. The research is also expected to offer valuable context for predicting future climate change, Dr Liz Thomas, head of the ice cores team at the British Antarctic Survey, said. Over the next few years, the samples will be analysed by different labs across Europe to gain understanding of Earth's climate evolution and greenhouse gas concentrations. Dr Thomas said: "It's incredibly exciting to be part of this international effort to unlock the deepest secrets of Antarctica's ice. "The project is driven by a central scientific question: why did the planet's climate cycle shift roughly one million years ago from a 41,000-year to a 100,000-year phasing of glacial-interglacial cycles? "By extending the ice core record beyond this turning point, researchers hope to improve predictions of how Earth's climate may respond to future greenhouse gas increases." The ice was extracted as part of the Beyond EPICA - Oldest Ice project, which is funded by the European Commission and brings together researchers from 10 European countries and 12 institutions. "Our data will yield the first continuous reconstructions of key environmental indicators-including atmospheric temperatures, wind patterns, sea ice extent, and marine productivity-spanning the past 1.5 million years," Dr Thomas said. "This unprecedented ice core dataset will provide vital insights into the link between atmospheric CO₂ levels and climate during a previously uncharted period in Earth's history, offering valuable context for predicting future climate change."
