![]() The Earth’s uneven, ellipsoid shape and gravitational force affect the ocean’s height differences. Ocean currents tilt the sea because of moving water and undersea mountains displace water by pushing it up. Several factors contribute to the variations in the sea level height. The height differences aren’t plainly perceptible to the human eye as they happen across many miles of oceans, according to NASA. By measuring the time it takes for the radar wave to return, scientists can calculate variations in sea level height. Scientists can measure uneven sea levels by using a satellite to bounce radar waves off the water’s surface. ![]() None of the post’s claims are based in reality.Īccording to NASA, the ocean does have topographical features - water at sea level is not perfectly uniform across the Earth. (Read more about our partnership with Meta, which owns Facebook.) The post was flagged as part of Facebook’s efforts to combat false news and misinformation on its News Feed. The caption adds that the container for the world’s ocean is Antarctica, which "wraps 360° around the Earth" and keeps the water from escaping. "The continents are large islands that are popping above the ocean level therefore, they are ‘dry land,’ inside contained, flat water with elevation features." "The ocean has no elevation features to its surface hence why we have SEA-LEVEL," the post’s caption said. Text superimposed over the image claims "the ocean isn’t spherical." ![]() The post features a photo of a small string of islands in the middle of the ocean alongside a topographic diagram of the ocean floor. The Earth is not flat, but that hasn’t stopped conspiracy theories that argue otherwise.Īn April 20 Facebook post from an account promoting flat Earth theories adds to the pile, claiming the ocean is held within a bowl-like container.
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