Atmospheric radiation

Atmospheric radiation is a substance on SR388 found in Metroid II: Return of Samus on the surface. If Samus jumps too high, space jump, or spider ball she will come to the edge of the 'atmosphere' and the zone will damage her space suit taking away energy at a fast rate. Towards the end of the game on the return, the atmosphere appears much higher than it did initally allowing Samus to clim bover a cliff and reach her ship for the ending.