A group of researchers from the UK, Switzerland, and the Czech Republic have proposed a unique method to store carbon dioxide for an extended period. They suggest sinking mature trees from the boreal forest into the deep Arctic Ocean to trap the carbon for centuries. This approach aims to offset the release of carbon when trees decompose or burn in wildfires.
In a recent study published in the online journal npj Climate Action, the scientists utilized computer simulations to evaluate the impact of removing specific stands of old trees in Canada, Alaska, and Russia. They suggested floating these trees down six Arctic rivers, such as the Yukon and Mackenzie, and submerging them in the Arctic Ocean. Concurrently, new fast-growing trees would be planted to enhance carbon absorption from the atmosphere.
The researchers discovered well-preserved 8,000-year-old trees in low-oxygen Alpine lakes, indicating that the cold, low-oxygen environment in the Arctic might effectively preserve carbon for millennia. The study projected that by implementing this strategy yearly in selected regions covering 10,000 square kilometers each, approximately one gigaton of carbon dioxide could be sequestered annually.
Despite the potential benefits of carbon storage, the substantial undertaking would involve significant energy consumption and associated carbon emissions. The logistics of cutting down trees, transporting them to rivers, and sinking them in the Arctic Ocean present practical challenges. Moreover, the ecological impact on ocean floor organisms and disruption to forest ecosystems, including Indigenous communities reliant on the forest, must be considered.
This initiative is part of broader geoengineering concepts aimed at mitigating escalating carbon emissions. While innovative solutions like injecting sulphur particles into the upper atmosphere or deploying large-scale sunshades in space are being explored, addressing the root cause of emissions by transitioning to sustainable energy sources remains paramount. Embracing clean technologies, such as solar, wind, nuclear, and fusion power, offers a promising pathway to combat climate change effectively.