One of the sections of the media that most interest the public are the weather forecasts.
The interest of the audience lies in the great influence that time has on our daily activities.
Meteorology uses various instruments that measure temperature, humidity and pressure in different places and at different heights. With them the maps of the time are elaborated. The basic elements of these maps are fronts, storms (or depressions) and anticyclones. With them you can explain where the clouds will go, where the conditions are for them to discharge their moisture and which direction the winds will take.
When two large masses of air with different and uniform temperatures meet, there is a shock that generates a sharp variation in humidity and temperature. The line of shock is called "front"
Is called cold front when the cold air moves towards the hot and warm front If the hot air makes its way to the cold. The altered area as a result of the crash is called cyclone, storms or depression. On the contrary, the area where the atmosphere is more stable, with high pressures, is called anticyclone.
Isobars are the lines that connect the points at which the atmospheric pressure at sea level is the same. They are usually expressed in millibars and are very useful for weather forecasting. Sometimes isobars form families of curves enclosed in each other around a region where the pressure is higher or lower than at the points around them. In the first case it constitutes an anticyclone and in the second a cyclone.
Is called front system on a couple of fronts, the first warm and the second cold, which go together with a depression or storm.
Storms and anticyclones
A storm or cyclone is an area of low atmospheric pressure surrounded by a system of winds that in the northern hemisphere move counterclockwise, and counterclockwise in the southern hemisphere.
The term cyclone it has been used with a broader sense by applying it to the storms and disturbances that accompany these low pressure systems, particularly the violent tropical hurricanes and typhoons, centered on areas of extraordinarily low pressure.
An anticyclone is an area where the atmospheric pressure is higher than in the surrounding areas. The isobars are usually very separated, showing that the pressure changes are not abrupt, which favors the presence of gentle winds that disappear in the vicinity of the center.
The air moves by turning clockwise in the northern hemisphere and counterclockwise in the southern hemisphere. The movement of air in anticyclones is characterized by the phenomena of convergence at the upper levels and divergence at the lower levels. The air that goes down is drying and heating, so it brings stability and good weather, with little chance of rain. In winter, however, the air that descends can trap mists and polluting elements under a thermal inversion and form the so-called "smog".
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