‘…Scientists from the University of Liverpool in the UK have discovered a strange sound emanating from the Caribbean Sea (part of the Atlantic Ocean). This whistle-like sound is so remarkable that while it’s too low to be heard by human ears, it can be picked up from space! They detected the sound when studying regional sea level and pressure changes, focusing specifically on the Caribbean Sea, because of its key function in forming currents that feed into the Gulf Stream.
While their research investigated climate change, the scientists quickly realized something unusual was going on. They saw pressure oscillations in their model that just didn’t make sense.
By zeroing in on these oscillations, the scientists realized they produced a low noise, described as a “whistle”. The effect of this sound is so powerful that it can be measured in space by looking at the oscillations in the gravity field of Earth. Further detective work by the Liverpool researchers led them to recognize the sound as a Rossby Wave, which travels west on the ocean, right into the Caribbean basin, where it disappears only to reappear 120 days later back in the east. Apparently, this wave is causing the seafloor to whistle.
Source: Big Think