Meteorology
Air temperature and humidity
By Redazione Published: 14/06/2012
Air temperatureUnder conditions of thermodynamic equilibrium, in stable weather, air temperature drops by about 0.6°C every 100 m of gain in altitude. However, from a purely theoretical point of view this calculation is of little…
Lightning
By Redazione Published: 13/06/2012
Lightning is a phenomenon that occurs between the clouds (negatively charged) and the Earth (positively charged).When the difference in electrical potential is so high that it breaks through the insulator (the air) lying between the…
Clouds
By Redazione Published: 13/06/2012
Layering by altitude…Clouds: a mass of moist air that rises, progressively drops in temperature and therefore in its capacity to hold water vapour, until it reaches saturation point.Once that limit is reached, the excess water…
How winds form
By Redazione Published: 12/06/2012
The atmosphere is a gaseous body in which, besides the gas molecules, there are suspendedmolecules of water in the form of vapour. The atmosphere is subject to solar radiation which, over the course of the…
Watching the sky to try to forecast the weather...
By Redazione Published: 12/06/2012
During the approach to the mountain, as dawn is breaking, watching the sky on the eve of an important ascent — or of a less demanding hike — is surely the gesture that every mountaineer…
Atmospheric pressure
By Redazione Published: 12/06/2012
Air has its own weight, and so you can measure the pressure it exerts on the earth's surface.Since the weight of air increases with its density and decreases with temperature, it follows that high pressure…