Basically displaces heat and would warm the earth as much as it cools the ocean

It would make the Large Hadron Collider a Tinker-Toy

And even assuming it was possible with any technology, the fact is that cooling creates more heat. Stand on the other side of your air conditioner - you'll feel that it's blowing hot air. Heat doesn't go away, it's just moved. Google the refrigeration cycle.

Since refrigeration isn't perfect (actually far from it), inefficiencies result in more heat coming out of the cooling device into the air or wherever it would go, than the water would be cooled ... and, of course, it would require huge amounts of energy to operate, significantly more than double what we use now. I've no doubt you know this, just wanted to make this part of the answer.

Pump cold INTO it!

Boom.

See how they like it for a change.

What if the worlds resources were put into desalinating the Mediterranean Sea and irrigating the Sahara desert? Especially if some aspects of the project could run off solar power? Please feel free to rip holes in my idea; it’s something I’ve been wondering about...

You can Google it.

which will generate heat and add to the carbon emissions.

Even if we were to use solar, wouldn't we rather use that energy on land to reduce carbon emissions?

utterly impractical. The heat capacity of the oceans is immense as would be the energy required to power the refrigeration needed to cool it.

As well, that would not solve the absorbed CO2 problem which is about as big a problem as the increasing temperatures.

Deep ocean water has a very uniform temperature, around 0-3 °C, while the temperature near the surface (where the vast majority of sea life exists) averages about 17°C

90 % of the total volume of the ocean is really, really cold

and started laughing when I saw cans, and cans of potted meat. I swear to God, I'd never, ever, seen a can of potted meat; I just assumed it was just something Billy Bob Thornton made up for the movie for the long joke.

I suspect your having a bit of fun with us.

Well played.

Oh, wait..