Solar wind induced magnetic field around the unmagnetized Earth

  title={Solar wind induced magnetic field around the unmagnetized Earth},
  author={Guido Thorsten Birk and Harald Lesch and C. Konz},
  journal={Astronomy and Astrophysics},
The Earth is a planet with a dipolar magnetic field which is agitated by a magnetized plasma wind streaming from the Sun. The magnetic field shields the Earth's surface from penetrating high energy solar wind particles, as well as interstellar cosmic rays. The magnetic dipole has reversed sign some hundreds of times over the last 400 million years. These polarity reversals correspond to drastic breakdowns of the dynamo action. The question arises what the consequences for the Earth's atmosphere… 

Figures from this paper

Terrestrial Effects of High Energy Cosmic Rays

Abstr act: On geological timescales, the Earth is likely to be exposed to higher than the usual flux of high energy cosmic rays (HECRs) from astrophysical sources such as nearby supernovae, gamma ray

The habitability of Proxima Centauri b. I. Irradiation, rotation and volatile inventory from formation to the present

Proxima b is a planet with a minimum mass of 1.3 MEarth orbiting within the habitable zone (HZ) of Proxima Centauri, a very low-mass, active star and the Sun's closest neighbor. Here we investigate a

Astrophysics in 2004

In this 14th edition of ApXX, we bring you the Sun () and Stars (), the Moon and Planets (), a truly binary pulsar (), a kinematic apology (), the whole universe ( and ), reconsideration of old

Changes in earth’s dipole

The dipole moment is stronger today than its long time average, indicating that polarity reversal is not likely unless the current episode of moment decrease continues for a thousand years or more.

Astrophysical radiation environments of habitable worlds

  • D. Smith
  • Physics, Environmental Science
  • 2006
vi Chapter 1 Transport of Ionizing Radiation in Terrestrial-like Atmospheres 1 1.



Generation of magnetic seed fields in self-gravitating protogalactic clouds

The seed magnetization of protogalaxies can be provided by relative shear flows and collisional friction of the ionized and the neutral fluid components in partially ionized self-gravitating and

Plasma-neutral gas simulations of reconnection events in cometary tails

The formation and dynamical evolution of cometary plasma tails and magnetic boundary layers is studied by the first numerical plasma-neutral gas simulations. It is shown that collisional interaction

Self‐generation of magnetic fields by sheared flows in weakly ionized plasmas

A sheared, relative ion–neutral flow can generate a magnetic field in an unmagnetized, weakly ionized plasma. The field generation term is ∂B/∂t=(mec/e)∇×νen(Vi−Vn) where νen is the electron–neutral

The origin of primeval magnetic fields: Self-consistent simulation of magnetic field generation and amplification

A self-consistent numerical model of self-generation and amplification of magnetic fields in weakly ionized protogalactic matter is presented. This model is based on three-dimensional two-fluid

The intensity of the Earth's magnetic field over the past 160 million years

In contrast to our detailed knowledge of the directional behaviour of the Earth's magnetic field during geological and historical times,, data constraining the past intensity of the field remain

Global changes in intensity of the Earth's magnetic field during the past 800 kyr

Recent advances in palaeomagnetic and dating techniques have led to increasingly precise records of the relative intensity of the Earth's past magnetic field at numerous field sites. The compilation

Venus and Mars: Atmospheres, ionospheres, and solar wind interactions; Proceedings of the Chapman Conference, Balatonfured, Hungary, June 4-8, 1990

The present conference discusses the evolution and chemistry-surface interactions of the Venus and Mars atmospheres, the properties of thermospheric gravity waves on earth, Venus, and Mars, far-UV

A Three-Dimensional Plasma-Neutral Gas-Fluid Code

Macroscopic dynamics of interacting hot plasmas and partially ionized gases can be studied by means of fluid simulations. Important applications are the Earth's magnetosphere?ionosphere?thermosphere

Comparison of cosmogenic radionuclide production and geomagnetic field intensity over the last 200 000 years

  • M. Frank
  • Environmental Science, Geography
    Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences
  • 2000
The production rate of cosmogenic radionuclides such as 10Be or 14C is known to vary as a function of the geomagnetic field intensity. It should, therefore, be possible to extract a record of

Introduction to Space Physics

Textbooks and popular science books that describe the broad field of space plasma physics are increasingly important as the space physics community seeks to broaden its base of support among both