Expert Film: Climatologist Heather Bingham talks about mesospheric, or noctilucent, clouds.

This lesson explores the temperature variations across the layers of the Earth's atmosphere, highlighting how temperatures drop dramatically from the surface to the mesosphere before rising again in the thermosphere. It also introduces the unique phenomenon of noctilucent clouds, which form at the coldest point of the mesosphere during summer months, offering fascinating insights into atmospheric science.