Is Lake Michigan big enough to be a sea?

Scientists might not classify the big lakes as seas, but they often study them as if they were. “The modelers here who work on things like currents and waves and ice use ocean models,” says Lauren Fry, a principal investigator at NOAA's Great Lakes Environmental Research Laboratory (GLERL) in Ann Arbor, Michigan.



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Because of their sea-like characteristics, such as rolling waves, sustained winds, strong currents, great depths, and distant horizons, the five Great Lakes have long been called inland seas.

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The greatest differences between a sea and a lake are their formation, boundaries, and size. Seas are vast naturally occurring bodies of saltwater that are partially enclosed by landmasses that are anywhere from 100,000 square feet and larger.

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Scientists might not classify the big lakes as seas, but they often study them as if they were. “The modelers here who work on things like currents and waves and ice use ocean models,” says Lauren Fry, a principal investigator at NOAA's Great Lakes Environmental Research Laboratory (GLERL) in Ann Arbor, Michigan.

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The lakes have more coastline than the East and West coasts combined! While ocean waves are created by distant storm systems, waves on the Great Lakes are formed by localized winds.

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“The waves hit you every three to five seconds in the Great Lakes, where in the ocean it might be 10 to 12 seconds between waves,” said Guy Meadows, a Michigan senior research scientist.

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Together with the Saint Lawrence Seaway, the Waterway allows both ocean-going vessels and the ore, grain and coal-bearing lake freighters to travel from the system's saltwater outlet to its far interior.

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The primary reason for shipwrecks on the Great Lakes is stormy weather, specifically in the upper portions of Lake Michigan, Lake Huron and Lake Superior. In the late fall and early winter, weather can be particularly treacherous. Most Great Lakes shipwrecks occurred in the late fall.

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Such small lakes are often referred to as ponds. Other lakes are so big that they are called seas. The Caspian Sea, in Europe and Asia, is the world's largest lake, with an area of more than 370,000 square kilometers (143,000 square miles).

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A sea is generally defined as a large body of salt water that is partly or fully enclosed by land but also has an outlet to the ocean. A lake, on the other hand, is a body of freshwater that is completely surrounded by land, with no direct access to the ocean.

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Lake Superior is the Cleanest and Clearest Great Lake Because of its somewhat isolated location and long cold winters, not much farming is done along Superior's shores. This means lower amounts of nutrients, sediments, and organic material are floating around the lake.

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There is an abundance of life and different creatures you might find in Lake Michigan. Whales just aren't one of them. See all of the animals you can find in the lake here.

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Lake Michigan The Great Lakes are all water bodies that swimmers should think twice about entering. Lake Michigan in particular is the roughest of the Great Lakes, and poses a major risk to those thinking of taking a dip. This body of water is often named the most dangerous lake in the United States.

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Threats to the Great Lakes' ecosystems, include invasive species, climate change, pollution, and habitat destruction. Climate change affects water temperatures, weather patterns, and lake levels.

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Of all of the Great Lakes, Lake Erie had become predominantly polluted by the 1960s, largely due to the heavy industrial presence along its shores. With 11.6 million people living in its basin, and with big cities and sprawling farmland dominating its watershed, Lake Erie is severely impacted by human activities.

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