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NASA
...Without a substantial magnetosphere to protect it, much of Mars's atmosphere is exposed directly to fast-moving particles from the Sun.
...Lacking a planet-wide magnetic field, most of the Red Planet is exposed to the full force of the incoming solar wind. "The Martian atmosphere extends hundreds of kilometers above the surface where it's ionized by solar ultraviolet radiation," says Dave Mitchell, a space scientist at the University of California at Berkeley. "The magnetized solar wind simply picks up these ions and sweeps them away."
"In 1989 the Soviet Phobos probe made direct measurements of the atmospheric erosion," he continued. When the spacecraft passed through the solar wind wake behind Mars, onboard instruments detected ions that had been stripped from Mars's atmosphere and were flowing downstream with the solar wind. "If we extrapolate those Phobos measurements 4 billion years backwards in time, solar wind erosion can account for most of the planet's lost atmosphere."
Originally posted by christina-66
reply to post by burntheships
Ask a Physicist
Same link posted again. (Hope it works this time - although it worked okay from where I was sitting). Now...as for me being rude....that was not my intention. Nor is it now.
The op asked if a magnetic pole shift could be behind mass extinctions....but....at the end of the op's own video the 'experts' state quite clearly that the end of the human race or any other mass extinction will not occur because the Earth loses it's magnetic shield. (Just like at the end of the link to the vid I have posted. As Phage has already stated in this thread - it its our atmosphere that shields us. Three rights must make a right.
I'm tired of psychological terrorism on issues so vast they can but add to my ever growing inferiority complex.
Had this story appeared in the newspapers it would have been described as a non-story. Yes the poles will shift....no they don't know when. The answer to the 'so what question' is being sought here......but there is no 'so what'...no dire consequences....no potential doom.....no mass extinctions. The worst that will happen is that our compasses will no longer work.edit on 23-3-2012 by christina-66 because: (no reason given)edit on 23-3-2012 by christina-66 because: (no reason given)
The NOAA National Geophysical Data Center has updated (revised – massaged) their magnetic north pole-shift positional data and has projected the location of the pole through 2015. The pole shift, if you will, continues to race along in the same direction since it dramatically accelerated back in the mid 1990′s. But…
NOAA made some significant and apparently linear changes to the pole location data going back to the years 2001 through 2010. The most noticeable result of the changes that they made was an overall linear slow down of the shift during the past decade, although still currently high at 30 miles per year. They have projected positional data through 2015 and have slowed the pace of movement each subsequent year from 30 miles (2012) to 24 miles (2015).
No apparent reason for the change was listed. A 10 year change nonetheless! Given the fact that they suddenly changed their previously posted data of the previous decade to indicate a slower pole-shift progression, they are now able to project a slowing trend through 2015. If it were not for changing their own data, they would not have been able to project this trend through 2015. It is beginning to look like the USGS, who when they change their earthquake magnitude numbers, they always (95% of the time) revise them downward. The revisions made are always in a ‘less alarming’ direction.
The following map shows the position of the magnetic north pole, and its shift since 1977. Read here for the past 400 years of magnetic north pole shift. Clearly it can be seen where the annual pole location begins to spread during the mid 1990′s when the acceleration rapidly increased.
Originally posted by ajay59
And notice the addy (.gov)
The earth’s magnetic field helps protect living things from harmful radiation.
Originally posted by maestromason
reply to post by ajay59
Apparently you have taken what I've said and misconstrued it. I never did put science "on its ear"...how can you say that when I just told you that I am a WELL-GROUNDED SCIENTIST?
You must be young and very immature thus lite on wits.
200 years of observation does not account for the creation of all in existence.
Even with all of the high-tech scientific instrumentation that is available to the most vigilant of the scientific community comes limitations.
Any true scientist knows this. I visit and chat with my NASA Glenn colleagues periodically and they will tell you the same thing.
Trained minds are limited in abilities as well.
Originally posted by ajay59
Originally posted by maestromason
reply to post by ajay59
Apparently you have taken what I've said and misconstrued it. I never did put science "on its ear"...how can you say that when I just told you that I am a WELL-GROUNDED SCIENTIST?
You must be young and very immature thus lite on wits.
200 years of observation does not account for the creation of all in existence.
Even with all of the high-tech scientific instrumentation that is available to the most vigilant of the scientific community comes limitations.
Any true scientist knows this. I visit and chat with my NASA Glenn colleagues periodically and they will tell you the same thing.
Trained minds are limited in abilities as well.
edit on 23-3-2012 by ajay59 because: (no reason given)
previous NOAA data revised NOAA data
Latitude Longitude year Latitude Longitude
80.815 -109.568 2001 80.772 -109.478
81.268 -110.89 2002 81.225 -110.807
81.714 -112.344 2003 81.67 -112.268
82.193 -114.095 2004 82.149 -114.026
82.623 -115.892 2005 82.578 -115.83
83.127 -118.178 2006 82.996 -117.828
83.579 -120.578 2007 83.443 -120.273
83.981 -123.067 2008 83.838 -122.814
84.37 -125.881 2009 84.218 -125.681
84.742 -129.077 2010 84.548 -128.62
2011 84.86 -131.91
2012 85.154 -135.594
2013 85.396 -139.28
2014 85.618 -143.339
2015 85.791 -147.26
Originally posted by christina-66
reply to post by ajay59
May I humbly enquire as to how the '.govt' link you posted has any bearing on magnetic pole shifts?
While the magnetosphere does divert charged particles toward the magnetic poles it doesn't really do much to protect us from solar or cosmic radiation. Electromagnetic radiation and neutral particles are unaffected by the Earth's magnetic field. It is our atmosphere which mainly protects us, even at the poles.
Originally posted by Phage
reply to post by ajay59
You mean me? I did not say the magnetosphere does not protect us from radiation. I said it does not protect us much.
While the magnetosphere does divert charged particles toward the magnetic poles it doesn't really do much to protect us from solar or cosmic radiation. Electromagnetic radiation and neutral particles are unaffected by the Earth's magnetic field. It is our atmosphere which mainly protects us, even at the poles.