Evaporative Convection in Glorious Time-Lapse

Description

This movie shows a ~3cm deep, 1m diameter layer of water seeded with reflective flakes. The water evaporates into the room, driving slow convective motions (cool water sinking, forming dark lanes; warm water rising, forming brighter regions). The time lapse takes place over ~2 hours; no motions were visible to the human eye. But visually rather striking though when sped up just a bit...