Image courtesy of lasp.colorado.edu
Earth's Magnetic Field
Our planet Earth is one the most active planets in the solar system. The Earth inter alia possesses a Magnetic Field which has probably permitted evolution of life on Earth. Indeed it protects us from dangerous solar particles and hence is fundamental for the development of life on Earth.
The mechanism of the magnetic field is still not entirely understood but severals hypothesis had been stated.
Numerous studies also showed that reversals of magnetic polarity have occurred throughout Earth's History. The apparent weakening of the magnetic field will be problematic for all those features that rely immensely on it. Satellites may be more exposed to the solar winds, which in turn would affect GPS devices, radio communications, etc.; furthermore, the oil industry would suffer, as it utilises readings obtained by analysing the field to guide drills. As the majority of animals (e.g. whales and turtles) use the magnetic field for navigation purposes, their migratory patterns may be terribly affected - issues relating to breeding, competition for resources, climate, etc. may arise (as not adapted to these changes in their environment). Studying the reversals is therefore fundamental.
A basic description of Earth's magnetic field is given as well as its importance, origin and evolution.
The mechanism of the magnetic field is still not entirely understood but severals hypothesis had been stated.
Numerous studies also showed that reversals of magnetic polarity have occurred throughout Earth's History. The apparent weakening of the magnetic field will be problematic for all those features that rely immensely on it. Satellites may be more exposed to the solar winds, which in turn would affect GPS devices, radio communications, etc.; furthermore, the oil industry would suffer, as it utilises readings obtained by analysing the field to guide drills. As the majority of animals (e.g. whales and turtles) use the magnetic field for navigation purposes, their migratory patterns may be terribly affected - issues relating to breeding, competition for resources, climate, etc. may arise (as not adapted to these changes in their environment). Studying the reversals is therefore fundamental.
A basic description of Earth's magnetic field is given as well as its importance, origin and evolution.