An Ice Core on Müller Ice Cap Adapted from Information by the University of Manitoba The Arctic Ocean is experiencing significant transformations as its sea ice continues to thin and shift northward throughout the year. This retreat of sea ice is influencing the climate of the land bordering the Arctic Ocean, resulting in the melting of ice caps on surrounding islands due to increasingly warm temperatures. By examining ice core samples from these caps, researchers can uncover historical proxy records of sea ice and climatic conditions in the Arctic. The Müller Ice Project, spearheaded by the University of Manitoba (UM), is a collaborative Canadian research initiative with scientists from Canada, Denmark, and Australia. Their mission is to extract an ice core that holds a climate and sea ice record spanning from 4000 to 20,000 years in northern Canada. They achieved a significant milestone by successfully drilling and retrieving an ice core around 2000 feet deep at Axel Heiberg Island in Nunavut, Canada. This ice core is the deepest ever extracted, containing invaluable data waiting to be analyzed. Over several weeks, the drilling team worked under harsh conditions, extracting the core in segments of 6 to 10 feet. Their efforts culminated when they began to recover sand and pebbles within the ice core sections, indicating they had reached the bedrock. “It has logistically been a challenging project, so I am so excited to successfully retrieve the ice core from Müller,” said Dorthe Dahl-Jensen, Principal Investigator of the project, and Canada Excellence Research Chair in Arctic Ice, Freshwater Marine Coupling, and Climate Change. The Müller ice core will offer insights into the past 10,000 years of climate and sea ice conditions from the Arctic Ocean. Additionally, researchers aim to determine whether the ice cap includes remnants from the extensive ice sheet that covered North America during the last ice age, as well as to conduct analyses for mercury. The project uses novel methods to measure the ice and will educate a new generation of climate researchers bringing new drilling technology to Canada. The ice cores will be stored in the Canadian Ice Core Laboratory (CICL) at the University of Alberta. Meanwhile, researchers from the University of Alberta will explore three 230-foot ice cores containing 200 years of climatic data. “Such a remote site, at the edge of the Arctic Ocean, will offer unprecedented insight into the long-range atmospheric transport of environmental contaminants to the far North - reconstructions of great importance both to science and to local communities,” said Alison Criscitiello, Director of CICL, and the University of Alberta. At the University of British Columbia, scientists will investigate greenhouse gases and mercury by extracting air from the snow to depth of about 200 feet. “This is the first time such measurements have been done on the Canadian ice caps and the results are looking very exciting,” said University of British Columbia Polar Climate Scientist, Anais Orsi. The findings from this project are expected to have significant implications for Inuit communities in Nunavut and northern Canada, as they will provide more accurate forecasts regarding climate change impacts in those regions. Basal ice core with sand and pebbles. Dorthe studying a brown layer in the ice core. ENV 25 OCTOBER 2025 WorldWide Drilling Resource®
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