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Space Weather A Research Perspective (1997) / Chapter Skim
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WHAT THE FUTURE HOLDS
Pages 74-79

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From page 74...
... Yet sunspot numbers themselves have exhibited considerable variation in intensity from one solar cycle to the next, in addition to small changes in the cycle periods, throughout their recorded history. There also appear to have been intervals in the fairly recent past when sunspots disappeared altogether for several cycles.
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From page 75...
... Space-based measurements available during the 1972 storm revealed potentially lethal doses of radiation had astronauts been outside the magnetosphere enroute to the moon. An extraordinarily active cycle when coronal material from numerous CMEs can overtake and reinforce each other's effects in interplanetary space, and flares occur frequently, should maintain a state of increased geomagnetic, atmospheric, and ionospheric disturbance.
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From page 76...
... Convective motions in the molten core that are responsible for the field's existence respond to variations in internal chemical and radioactive heat sources and gravitational "stirring" by solidifying material settling toward Earth's center. Magnetization left in crustal rocks that solidified at different times in the past indicates that these motions have periodically undergone sudden adjustments (sudden on geological time scales of a billion years, at least)
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From page 77...
... While it is difficult to imagine what life on Earth will be like so many generations into the future, humankind present in the year 4000 may have quite different perspectives on their space environment than we have today. The changing location of the north magnetic pole determined by measurements over the last decade and a half (courtesy of Canadian National Geomagnetism Program file:///S|/SSB/1swFuture.htm (4 of 4)
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From page 78...
... file:///S|/SSB/haossn.gif file:///S|/SSB/haossn.gif [6/25/2003 4:39:31 PM]
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From page 79...
... file:///S|/SSB/ssnpred_01.gif file:///S|/SSB/ssnpred_01.gif [6/25/2003 4:39:37 PM]
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Key Terms

  • solar cycle
  • space weather
  • dipole field
  • magnetic poles
  • activity cycle

  • field strength
  • solar wind
  • solar cycles
  • related solar
  • nonuniform solar

  • solar minimum
  • solar proton
  • solar variations
  • reduced solar
  • closely approach

  • ice age
  • radiation environments
  • remain strong
  • poles appeared
  • weather equation

  • north magnetic
  • periodically undergone
  • magnetic pole
  • south magnetic
  • storms occurred

  • sunspots disappeared
  • nearly global
  • rock suggest
  • magnetic storms
  • little ice


    • This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
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