Photo credit: https://polarpedia.eu/en/gulf-stream/

Simply put, there are large ice fields at the two poles, which normally calve icebergs from the glaciers at a slow pace.

As well, the very cold water in the poles causes sea ice to form.

These icebergs are important for temperature/climate stabilization around the globe.

How?

Let’s look at the North Atlantic Current offshore of the Eastern United States:

This travels from the equator and brings warmer water to the northern hemisphere. It is part of the Global Conveyor Belt that moves all the way around the globe and moderates temperatures and climate.