Physics
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3209606d&link_type=abstract
Geophysical Research Letters, Volume 32, Issue 9, CiteID L09606
Physics
23
Global Change: Climate Dynamics (0429, 3309), Oceanography: General: Numerical Modeling (0545, 0560), Oceanography: Physical: General Circulation (1218, 1222)
Scientific paper
Which physical processes effectively determine the stability regime of the Atlantic meridional overturning circulation (MOC) is not yet fully understood. We investigate the role of the oceanic freshwater transport into the basin, employing a coupled model of intermediate complexity. By modifying the longitudinal variation of surface salinities near the southern border at 33°S, the amount of salt flowing out of the Atlantic via the Brazil Current can be regulated. In turn, this will influence whether the MOC exports or imports salt water. The latter is associated with a basin-scale salinity-overturning feedback, which can be either positive or negative. Pulse experiments strongly suggest that its sign determines the existence of a monostable or bistable regime in our model.
de Vries Pedro
Weber Susanne L.
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