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.”