Weather Glossary - X
The portion of the electromagnetic spectrum that has a very short wave length. It has a wavelength longer than gamma rays, yet shorter than visible light. X-rays can penetrate various thicknesses of all solids, and when absorbed by a gas, can result in ionization.
An inert gas that occurs at extremely low concentration in the atmosphere.
Night-time temperatures will drop well below average in the Capital from Wednesday.
Warmer-than-normal oceans have contributed to a late end to a big wet season across the southern hemisphere.
Marine scientists have upped the ante in their fight to save the Great Barrier Reef from the devastating effects of coral bleaching.