Sinking Carbon: A Proposal to Store Boreal Wood in the Arctic Seafloor
Researchers propose harvesting boreal forest timber and sinking it in the oxygen-poor Arctic Ocean — a carbon removal method that sidesteps infrastructure costs but raises questions about who governs such planetary-scale interventions.
Cambridge and Czech Academy researchers have proposed what might be called ecological burial at scale: harvest timber from boreal forests, float it down river systems, and sink it in the deep Arctic Ocean, where cold temperatures and near-zero oxygen could lock carbon away for millennia. The approach builds on wood vaulting — storing biomass in purpose-built anaerobic or frozen facilities — but substitutes the Arctic seafloor for thousands of engineered vaults.
The logic is straightforward. Boreal forests stretching from Alaska to Siberia store roughly a trillion tons of carbon in trees, deadwood, and peat. Much of this already becomes driftwood, floating into the Arctic and eventually settling on the seafloor. Studies of Alpine wood preserved over 8,000 years show negligible cellulose degradation in cold, low-oxygen conditions. The researchers argue that deliberately scaling this process could sequester meaningful carbon — estimates suggest we need to remove over 10 billion tons of CO₂ annually this century — from forests with “low economic importance” and proximity to major river systems.
What’s unstated is the governance architecture such a scheme would require. Who decides which boreal forests to harvest, at what scale, and under whose authority? The Arctic Ocean spans multiple national jurisdictions and Indigenous territories. The proposal positions biodiversity-poor Arctic waters as a carbon sink for fire-prone Siberian and northern North American forests — framing one ecosystem’s vulnerability as justification for another’s industrial use. It’s a reminder that carbon removal proposals, however elegant on paper, demand not just technical validation but participatory governance design — systems that can negotiate tradeoffs between carbon storage, forest ecology, marine ecosystems, and the communities whose lands and waters would be transformed into planetary infrastructure.