Ice pumps and their rates

摘要: An ice pump is a heat engine, driven by the change of freezing point with pressure, which will melt at depth in ocean and deposit it shallower location: self-starting. Calculations maximum magnitude this effect are made show good agreement field data available for sea lake ice. The discussion applied to general case moving pack sheet well-mixed surface layer floating shelves. rate from an 11-m-deep pressure ridge keel due pumping estimated as 26 cm/year, that front Ross Ice Shelf McMurdo Sound, Antarctica 5 m/year level water movement noted authors' observations. Far front, between shelf areas different thickness still occur, tidal motion providing necessary exchange, but its now limited ability remove potentially stable out system. It important realize does not depend on availability sensible column effects additional any melting caused advection warmer ice-water interface.