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What can cosmic dust tell us about the changing Arctic?
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In 2025, the Arctic sea failed to recover as much ice as usual from melting ice, and a record-low maximum was recorded in March.
PHOTO: REUTERS
Sachi Kitajima Mulkey
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Scientists have reconstructed 30,000 years of changes to sea ice in several locations across the Arctic Ocean by looking for traces of cosmic dust embedded in the seafloor, according to a study published on Nov 6.
Scientists analysed sediment samples from the Arctic Ocean by looking for traces of space particles, which fall through the atmosphere at a constant rate and blanket exposed surfaces. If those particles reached the ocean floor, it is an indication that there was no sea ice blocking their path during the years that a particular sediment layer formed.
