Weakening magnetic field and ozone layer

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Discussion Overview

The discussion revolves around the potential relationship between the weakening magnetic field of Earth and the thickness of the ozone layer. Participants explore various aspects of this topic, including theoretical connections, historical context, and the effects of solar activity.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants note that while the magnetic field is weakening and the ozone layer is thinning, the relationship between the two remains unclear.
  • One participant suggests that the weakening magnetic field could allow more cosmic particles to enter the atmosphere, potentially reacting with ozone or affecting nitrogen molecules, but the quantitative effects of this process are uncertain.
  • Another participant mentions that direct solar activity might have a more significant impact on the ozone layer than the magnetic field.
  • Historical evidence is cited regarding past collapses of the Earth's magnetic field, with no associated biological upheaval noted, suggesting that a future collapse may not have severe consequences.
  • Questions are raised about the potential effects of a coronal mass ejection (CME) on the Earth's magnetic field, with some arguing that the magnetic field protects against CMEs rather than being harmed by them.
  • One participant expresses curiosity about possible interactions between the magnetic field and external forces, likening it to the behavior of magnets, but remains uncertain about the implications of such interactions.

Areas of Agreement / Disagreement

Participants generally agree that the weakening magnetic field and thinning ozone layer are occurring, but they do not reach a consensus on the relationship between the two or the effects of external solar phenomena.

Contextual Notes

There are limitations in the discussion regarding the assumptions made about the interactions between cosmic particles and ozone, as well as the historical context of magnetic field collapses and their biological impacts.

d3stor
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Are there any evidence / researches about the relation of weakening magnetic field of Earth and thickness of ozone layer?
 
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Excellent question.

Yes, the magnetic field is weakening slightly and the ozone layer is getting thinner but a relationship between the two is unclear.

Of course ozone is http://www.al.noaa.gov/WWWHD/Pubdocs/Assessment02/Q&As2.pdf due to ultraviolet light and destroyed again by chemical active particles. There is a balance between the two. Weakening magnetic field would allow more cosmic particles to enter the atmosphere, mayby reacting directly with ozone or via breaking up nitrogen molecules (N2) that recombine with ozone to form nitric oxide but the quantitative magnitude if this process is unclear. Direct solar activity may have much more effect on the ozone layer.

As for the experience of Earth in the past. The last million years have shown a dozen or so collapses of the Earth magnetic field and one flip of the magnetic poles 780,000 years ago. None of these events have been associated with any biologic upheavel (extinctions) and the only massive extinction (the mammoths an so on) is not associated with a collapse of the magnetic field. So chances are fair that not to much will happen in case of a magnetic field collapse.
 
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Andre said:
Yes, the magnetic field is weakening slightly and the ozone layer is getting thinner but a relationship between the two is unclear.
Actually, I heard (maybe I'll look for it...) that the hole is now closing due to the elimination of CFC's.
 
Would it be possible for the magenetic shockwave from a very, large coronal mass ejection, aimed directly at Earth, to have any negative impact on the Earths magnetic field? Or, possibly, indirectly causing a pole shift?
 
B. Elliott said:
Would it be possible for the magenetic shockwave from a very, large coronal mass ejection, aimed directly at Earth, to have any negative impact on the Earths magnetic field? Or, possibly, indirectly causing a pole shift?
No, the magnetic field comes from inside, not outside the earth. Its a result of the spinning of the core.

A CME or flare doesn't harm our magnetic field - its our magnetic field that protects us from the effects of a CME. So a really big one can overwealm our magnetic field and damage electronics in satellites and disrupt communications. But the magnetic field itself remains intact.
 
thankyou for the reply.

I understand the source of the field completely. I was just wondering if there were any attracting/opposing effects going on between the two. The Earths field (core)trying to maintain, for lack of better words.

i'm thinking along the lines of moving a magnet closer to another magnet. one magnet will attempt to move (core) if the others inward path is held. Or did i just answer my own question? :P
 

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