Glacier Geoengineering May Have Unintended Consequences for Marine Ecosystems and Fisheries

A proposed geoengineering solution to mitigate sea level rise by installing underwater barriers to block warm ocean currents around Greenland's Sermeq Kujalleq glacier in Ilulissat Icefjord may have unintended negative consequences for marine ecosystems and fisheries. While the concept aims to reduce ice melt and destabilization of tidewater glaciers, field observations and fjord-scale models suggest that such barriers could disrupt marine productivity, with potential social and economic impacts on Greenland's fisheries. The study highlights the need for parallel consideration of technical feasibility and socio-economic viability in geoengineering interventions to ensure beneficial outcomes amid climate change challenges.

Hopwood, M. J., Schiøtt, S., & Oliver, H. (2025). Glacier Geoengineering May Have Unintended Consequences for Marine Ecosystems and Fisheries. AGU Advances, 6(4). Portico. https://doi.org/10.1029/2025av001732