Sounds More Like Glacial Geo-Adaptation to Me

March 19, 2018 Off By Brian
 (Source)

Interesting article in Nature speculating that certain possibly feasible, artificial interventions in major ice flows from Antarctica and Greenland could slow the pace of sea level rise. The ideas are artifical barriers that slow the flow of "warm" ocean waters that undercut and speed up ice flows, creating artificial islands that partially pin ice floating sheets in place, allowing them to brake ice flows from land, and pumping out lubricating water flows from underneath ice sheets that speed up their flow.

The authors acknowledge the difficulties and potential environmental damage caused by these interventions and consider them no substitute for reversing GHG emissions. To the extent that the effort is to reduce ice flow velocities to speeds closer to what happened prior to climate change, it sounds to me like it's approximating a more natural system than doing nothing. That's why I'd consider it more of an adaptation approach than a geoengineering approach that is meant to subsitute for actions on GHG emissions.

I'd be interested to know if these adaptations can help stabilize and recover the ice sheets that in the long term seem doomed, even with some level of recovery from climate change.

Definitely seems worth further research.