There are three major differences that make Great Lakes Earth’s Arctic considerably cooler from our Arctic. First off, compared to our oceans, the Arctic Ocean of Great Lakes Earth seems to have a little elbow room. The reason is that the Atlantic on Great Lakes Earth is 2177 kilometers wider than ours, pushing Eurasia, Africa and Sahul eastward. This creates a land bridge connecting Asia to North America, as it had been for 45 million uninterrupted years.
Also, the island of Greenland has been moved to the extent that Mont Forel, the island’s highest peak, is located in the North Geographic Pole.
Another major difference is the depth of the Arctic Ocean. Back home, the average depth is only 1205 meters, almost 4,000 feet. By contrast, the Arctic’s average depth on Great Lakes Earth is a staggering 3460 meters. That’s 11,352 feet!
Antarctica is the same as back home. However, the Southern Ocean differs in depth. Back home, the average depth is 4500 meters. On Great Lakes Earth, it is merely 2735 meters.
One other difference between our Antarctica and the one on Great Lakes Earth is the terrain. 65 million years ago, Antarctica was the center of a vast pool of lava, estimated to cover an area of seven million square kilometers and a volume of seven million cubic kilometers.
With all these changes mentioned above, how would climate and landscape be affected? Would their effects reach the entire planet?