SIMULATIONS OF 2 LAST GLACIAL MAXIMUM OCEAN STATES

Two stable thermohaline circulation states were produced in simulation s of the last glacial maximum (LGM) ocean, both forced by the same pre scribed atmosphere. Direct application of this atmosphere led to an eq uilibrium stale with strong North Atlantic Deep Water formation (north ern sinking state (NSS)). Upon applying a weak freshwater flux anomaly to the Worth Atlantic for a short time a state was entered with littl e North Atlantic, but significant Southern Ocean, Deep Water formation (southern sinking state (SSS)). A fully dynamic and thermodynamic ice berg trajectory model was developed, and icebergs were seeded into bot h states. Distinctly different pathways were found, particularly in th e eastern Atlantic where the SSS icebergs tend to move south along the European coast while they move north in the NSS. While neither ocean state is claimed to be a definitive model for the LGM ocean, paleoclim ate data are more consistent with the characteristics of the NSS.