Scientists Uncover Secrets of Mega-Tsunamis in Greenland

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Researchers have confirmed the cause of two massive "mega-tsunamis" that rocked East Greenland's Dickson Fjord for nine days in September 2023. According to a study published in Nature Communications, the waves, one measuring 650 feet high, were triggered by landslides resulting from climate change-induced glacier melting.

Initially, the seismic signals generated by the waves were a mystery until satellite imagery pinpointed the landslides as the culprit. Lead author Thomas Monahan, a graduate student at the University of Oxford, stated, "Climate change is giving rise to new, unseen extremes," highlighting the pressing need for enhanced monitoring in remote regions like the Arctic.

The research utilized data from the Surface Water and Ocean Topography (SWOT) satellite, launched in December 2022, which employs advanced radar technology to map water levels with unprecedented accuracy. Co-author Thomas Adcock emphasized that the findings illustrate the potential of next-generation satellite data to resolve geological phenomena previously shrouded in mystery.

These insights may pave the way for improved forecasting of oceanic extremes, including tsunamis and storm surges, according to the researchers.

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