The proposal for saving Antarctic ice in the submitted article may be just too big for humans to do. Sulfur dioxide injection, however, is dirt cheap, and we could definitely do that. I'm not saying it's a good idea, but we can do it.
We need short-term remediation, starting immediately. This is the only cost-effective method.
From the "Conclusions" section:
> Analysis of our results and comparison to the results of Kuylenstierna et al.[2001] and Skeffington[2006] lead to the conclusion that the additional sulfate deposition that would result from geoengineering will not be sufficient to negatively impact most ecosystems, even under the assumption that all deposited sulfate will be in the form of sulfuric acid. However, although these model results are feasible, should geoengineering with sulfate aerosols actually be conducted, local results due to weather variability may differ from the results presented here. With the exception of terrestrial waterways, every region has a critical loading value a full order of magnitude above the largest potential total amount of acid deposition that would occur under the geoengineering scenarios presented in this paper. Furthermore, our results show that additional sulfate deposition tends to preferentially occur over oceans, meaning the chance of such a sensitive ecosystem receiving enough additional sulfate deposition to suffer negative consequences is very small.
Also note that I did not say that sulfur dioxide injection was a good idea, only that we could afford to do it.