Can an ice age exist at one point on the earth at the same time as other parts of the earth become hotter?

Question

When warm water currents travels up to the North pole along the coast of Labrador where it dumps its warmth. It then travels back towards the equator. If the water going up to the pole is too warm, it can cause a warming trend at the poles and the glaciers to melt quickly. This would dump a lot of fresh water into the oceans. The fresh water acts like a dam and would then prevent the cold water current from being able to reach the depths of the ocean since fresh water is lighter then salt water. This would prevent the exchange of heat for cold at the poles. If I undrstand this right then anything above the fresh water dam would become colder and anything below the fresh water dam would become hotter. In other words, there would be an ice age at the poles downwards and at the equator would be desert like conditions upwards towards the edge of the dam. This would continnue until the excess fresh water can combine enough with the salt water enough to allow the exchange of currents again.

Answer 1

Maybe you should become a climatologist and offer your theories to the scientific community for review. Hypotheses such as this one are currently being first tested through computer simulation, and if shown feasible, field studies would be necessary to bolster your theory. Because it'll be almost impossible for you alone to do all of that, what you'll have to do is to gain a number of adherents to your theory. For example, the neutrino oscillation theory was first proposed decades ago to account for anomalous solar neutrino readings, but only after thousands of people got involved and hundreds of millions of dollars was spent was the hypothesis demonstrated.

My objection to your hypothesis is that the cold Atlantic thermohaline (North Atlantic Deep Water) flowing south runs along the ocean floor, and so it seems to me that if fresh water is lighter than salt water, it won't block this current. And so where does that put your hypothesis?

I agree with you, however, that in periods of mild ice ages, worldwide temperatures do not necessarily all drop, because it does depend on thermohalines in the oceans. Some parts could get colder, while other parts would be unaffected.