How fast is the Arctic ice retreating? Just listen to it melt. | Bulletin of the Atomic Scientists
for a melting glacier, you just hear a constant cacophony of sound. There are so many bubbles released to the water at the same time that you cannot just distinguish between individual pulsations.
But when there is an iceberg, you can actually hear the individual popping sound, of individual bubbles being released into the water. For example, listen to this iceberg recording.