Fronts

A front in a meteorological sense is the zone of contact between air masses with different density, temperature and humidity. The frontal band is the area in which two air masses come into direct contact, the area in which energy exchanges take place and where the more intense atmospheric phenomena are produced. Generally, a front appears as a more or less regular surface, with a low angle , slightly inclined, and it generally forms a curved line on the horizontal plane. Meteorologists identify three types of fronts: cold, hot and occluded.
When hot or cold fronts form, the condensation processes free thermal energy and this contributes to creating areas at different temperatures, triggering off local circulation and mixing and contributing to a further increase in the instability of the air masses.
The front of a perturbation, in the initial phases of its formation, is generally related to the so-called wind front, that is associated to the progress of cold masses of air that descend from the perturbation. At times the wind front is made visible by dust clouds that rise from the ground (as in dust storms) or by the condensation front that gives rise to the formation of spectacular arc-shaped clouds on the same level of the perturbation front.
The presence of mountains along the course of the front can bring about variations and deformations of various kinds that can make the perturbation evolve in an unpredictable way.

Special reports

  • 29 April 2020

    Lightning

    Man has always been afraid of lightning, in fact in the past lightning was considered a sign of the anger…

    23 October 2017

    Carbon Footprint

    A very special footprint...

    10 February 2020

    Coral turns pale!

    The coral reef is one of the ecosystems with the richest biodiversity...

  • 15 November 2021

    How did Cop26 end?

    On Saturday afternoon in Glasgow, representatives of more than 200 countries attending the COP26 United Nations climate change conference reached…

    5 November 2021

    Cop26, the calendar for the climate conference

    1 November was the first day of the summit, the opening ceremony of which began with a speech by British…

    25 August 2021

    Geo-engineering: a contribution to mitigate climate change?

    Geo-engineering, the science to moderate global warming...

  • 29 April 2020

    Lightning

    Man has always been afraid of lightning, in fact in the past lightning was considered a sign of the anger…

    5 August 2019

    Summer wind

    A sixteen-year-old Swedish girl is braving the wind, cold and rain to take her protest against the changing climate onto…

    17 July 2018

    Tornadoes and waterspouts: phenomena that (also) occur in Italy

    When we talk about tornadoes, our thoughts immediately go to the immense American plains and the area known as “tornado…

  • 29 April 2020

    Lightning

    Man has always been afraid of lightning, in fact in the past lightning was considered a sign of the anger…

  • 23 October 2017

    Carbon Footprint

    A very special footprint...

  • 10 February 2020

    Coral turns pale!

    The coral reef is one of the ecosystems with the richest biodiversity...

From the Multimedia section

Facts