The thermohaline circulation is likely to slow down with global warming. how might a slower thermohaline circulation affect earths climate?

Slower thermohaline circulation will have global impact on the climate. It will become slower as a consequence of the melting of the polar ice sheets, thus cooling off the water in the oceans. Once this happens and the thermohaline circulation becomes slower, the Earth will start entering a new ice age because of the smaller amount of warm water and air distributed through out the globe. That will cause significant drop of the temperatures on a global scale.