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Stability of the thermohaline circulation in a simple coupled model

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Citation:
Lohmann, G. , Gerdes, R. and Chen, D. (1996): Stability of the thermohaline circulation in a simple coupled model , TellusA, 48 , pp. 465-477 .
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Abstract:

In an analytical study the stability of the thermohaline circulation with respect to freshwater perturbations in high latitudes is investigated. The study is based on a coupled ocean and atmosphere box model in an idealized North Atlantic geometry. The box model provides a qualitative understanding of how the thermohaline circulation is affected by feedback mechanisms associated with changes in atmospheric transports of heat and moisture. Within a linear analysis we examine the stability of the thermohaline circulation for a range of different atmospheric boundary conditions. The stability of the coupled system depends on the imposed transport parameterizations and the basic state. For the underlying non-linear system we examine the sensitivity with respect to the strength of salinity perturbation.

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