Professor Salter proposed his ideas at a meeting of the Arctic Methane Emergency Group to which MPs were invited. As the organisation title (and website) suggests, the group take a rather catastrophic view of the future and it seems the proposal doesn't go down well in some quarters. The ScienceNordic website, for example, suggests it is a 'wild' idea:
"The melting of the Arctic ice doesn’t only result in our Earth getting warmer and warmer. Another consequence is that climate researchers and engineers are coming up with increasingly far-fetched suggestions on how to combat global warming. The latest wild suggestion comes from Professor Stephen Salter of Edinburgh University, Scotland. At a recent meeting with British MPs, Salter suggested that politicians could stop the melting of the Arctic ice by building giant towers that throw seawater up into the atmosphere."