  The possibility of direct air capture of CO$_2$ in Antarctica is discussed.
Because the concentration of H$_2$O in the atmosphere during the Antarctic
winter is extremely low, an installation for direct air capture could employ a
physisorption-based process, allowing, in principle, a very short
adsorption/desorption cycle time. The lower required binding allows more
options for materials for the sorbent. With a shorter cycle time, more resource
could be spent on structuring the sorbent to improve energy efficiency, for
example by improving its mass efficiency if desorption is driven thermally.

Physics and Society;Atmospheric and Oceanic Physics