Weather

Weather is a term that encompasses phenomena in the atmosphere of a planet.
The term is normally taken to mean the activity of these phenomena over short periods of time, usually no more than a few days.
Average atmospheric conditions over significantly longer periods are known as climate.
Usage of the two terms often overlaps and the physical concepts underlying them are closely related.
On Earth, regularly occurring weather phenomena include such things as wind, cloud, rain, snow, fog and dust storms.
Less common events include natural disasters such as tornadoes, hurricanes and ice storms.
Almost all familiar weather phenomena occur in the troposphere (the lower part of the atmosphere).
Weather does occur in the stratosphere and does affect weather lower down in the troposphere, but the exact mechanisms are poorly understood. The Earth's atmosphere is a chaotic system, so small changes to one part can have large effects elsewhere.
This makes it very difficult to accurately predict weather changes more than a few days in advance, though weather forecasters are continually working to extend this limit through the scientific study of weather, meteorology.
For more information about the topic Weather, read the full article at Wikipedia.org, or see the following related articles:
Eucalyptus and related trees — Eucalypts are tree species belonging to three closely related genera, Angophora, Corymbia and Eucalyptus. Of these, Eucalyptus has the most species,
Probability theory — Probability theory is the mathematical study of phenomena characterized by randomness or uncertainty. More precisely, probability is used
Season — A season is one of the major divisions of the year, generally based on yearly periodic changes in weather. In temperate and polar regions
Crust (geology) — In geology, a crust is the outermost layer of a planet. The crust of the Earth is composed of a great variety of igneous, metamorphic,

Atmospheric chemistry

Atmospheric chemistry is a branch of atmospheric science in which the chemistry of the Earth's atmosphere and that of other planets is studied.
See also:
It is a multidisciplinary field of research and draws on environmental chemistry, physics, meteorology, computer modeling, oceanography, geology and volcanology and other disciplines.
For more information about the topic Atmospheric chemistry, see the following related articles:
Earth science — Many scientists are now starting to use an approach known as Earth system science which treats the entire Earth as a system in its own right,
Geophysics — Geophysics, the study of the earth by quantitative physical methods, especially by seismic reflection and refraction, geodesy, gravity, magnetic,
Planetary boundary layer — The planetary boundary layer (PBL) is also known as the atmospheric boundary layer (ABL). It is the lowest part of the atmosphere and its behavior
Nitrogen oxide — NOx is a generic term for the various nitrogen oxides produced during combustion. They are believed to aggravate asthmatic conditions, react with the