Page 1 of 3 123 LastLast
Results 1 to 10 of 22
  1. #1 Rare Drop in Sunspot Activity Could Cause Little Ice Age 
    LTC Member Odysseus's Avatar
    Join Date
    May 2008
    Location
    FT Belvoir, VA
    Posts
    15,638
    Wednesday, June 15, 2011 9:22 AM EDT
    http://www.ibtimes.com/articles/1634...le-ice-age.htm

    By IB Times Staff Reporter

    The sun is most likely going into hibernation as the latest unusual solar readings, including fading sunspots and weakening magnetic activity near the poles suggest that we are headed towards a solar event that hasn't happened in hundreds of years, according to new data released Tuesday at the annual meeting of the solar physics division of the American Astronomical Society in Las Cruces, New Mexico.

    Even though the Sun has been active recently as it heads towards solar maximum in 2013, there are three lines of evidence including a missing jet stream in the solar interior, fading sunspots on the sun's visible surface, and changes in the corona and near the poles suggest that the next 11-year-long solar cycle will be far quieter than the current one or it may not even happen.

    There are some scientists at the conference who said the current findings from the studies mean that we are at the beginning of a Maunder Minimum, a 70-year period that began around 1645 when hardly any sunspots were observed.

    This decline in sunspots coincided with below-normal temperatures, in a climate period known as the Little Ice Age that struck Europe and North America, where temperatures dropped by 1.8 to 2.7 degrees Fahrenheit (1-1.5 degrees Celsius). But scientists warn that the temperature change due to a decline in sunspot activity would likely be minimal and not enough to compensate for global warming.

    Sunspots were first observed by Chinese astronomers in 800 B.C., systematic observations of sunspots through the telescope started around 1600. In 1843, a German astronomer Samuel Schawbe first discovered that the number of sunspots wax and wane in a cyclic fashion with an 11-year periodicity. This is called the sunspot cycle or the solar cycle.

    We're now in Solar Cycle 24, heading for a maximum in the sun's activity sometime in 2013. The new studies noticed a long-term trend of sunspot weakening, and if the trend continues, the sun's magnetic field won't be strong enough to produce sunspots during Solar Cycle 25.

    “The flow for Cycle 25 should have appeared in 2008 or 2009 but it has not and we see no sign of it. This indicates that the start of Cycle 25 may be delayed to 2021 or 2022, with a minimum great that what we just experienced, or may not happen at all,” said Frank Hill, the associate director of the National Solar Observatory's Solar Synoptic Network.

    The 2008 and 2009 period was unusual in that all of the sunspots disappeared, a situation that had not occurred for nearly a century.

    The Maunder Minimum, a 70-year period with virtually no sunspots, coincided with the Little Ice Age, a period of unusual cold. But it has not been proven whether there is a causal connection between low sunspot activity and cold winters as that period also coincided with an upswing in volcanic emissions, which are known more definitely to contribute to global cooling.

    So astronomers will be watching the sun carefully over the next couple of years to find out if the activity on the Sun contributes to climate change on Earth.
    ++++++++++++++++++++++++++++++++++++

    I think that we can stop worrying about CO2 and greenhouse gasses now.
    --Odysseus
    Sic Hacer Pace, Para Bellum.

    Before you can do things for people, you must be the kind of man who can get things done. But to get things done, you must love the doing, not the people!
    Reply With Quote  
     

  2. #2  
    Zoomie djones520's Avatar
    Join Date
    Jun 2008
    Location
    St. Louis
    Posts
    10,073
    Hmmm... we've been having a lot of major eruptions lately as well. I wonder if the sun quieting down has anything to do with volcanic eruptions, leading to global cooling?
    In most sports, cold-cocking an opposing player repeatedly in the face with a series of gigantic Slovakian uppercuts would get you a multi-game suspension without pay.

    In hockey, it means you have to sit in the penalty box for five minutes.
    Reply With Quote  
     

  3. #3  
    Senior Member Bailey's Avatar
    Join Date
    Aug 2010
    Posts
    6,147
    Quote Originally Posted by djones520 View Post
    Hmmm... we've been having a lot of major eruptions lately as well. I wonder if the sun quieting down has anything to do with volcanic eruptions, leading to global cooling?
    well its been freaking hot where i live so no global cooling as of yet :(
    Reply With Quote  
     

  4. #4  
    Best Bounty Hunter in the Forums fettpett's Avatar
    Join Date
    Oct 2009
    Location
    Southwest Michigan (in Exile)
    Posts
    8,757
    we've had a really cool spring/summer so far, only a few days over 70, let alone above 80.


    wonder if we'll get another Mary Shelly out of it :D
    Reply With Quote  
     

  5. #5  
    LTC Member Odysseus's Avatar
    Join Date
    May 2008
    Location
    FT Belvoir, VA
    Posts
    15,638
    Quote Originally Posted by djones520 View Post
    Hmmm... we've been having a lot of major eruptions lately as well. I wonder if the sun quieting down has anything to do with volcanic eruptions, leading to global cooling?
    Possibly. As the Earth's crust cools, it contracts, causing tectonic shifts. The ocean floor would lose heat faster than the surface landmass, so the contractions might be felt more in coastal areas, hence the tsunami in Japan.

    Of course, I'm not the climate expert that Wilbur is... :D
    --Odysseus
    Sic Hacer Pace, Para Bellum.

    Before you can do things for people, you must be the kind of man who can get things done. But to get things done, you must love the doing, not the people!
    Reply With Quote  
     

  6. #6  
    Senior Member Bailey's Avatar
    Join Date
    Aug 2010
    Posts
    6,147
    Quote Originally Posted by fettpett View Post
    we've had a really cool spring/summer so far, only a few days over 70, let alone above 80.


    wonder if we'll get another Mary Shelly out of it :D
    Ya but dont you guys have only one or two months of decent weather then its back to snowstorms? :D:p
    Reply With Quote  
     

  7. #7  
    Zoomie djones520's Avatar
    Join Date
    Jun 2008
    Location
    St. Louis
    Posts
    10,073
    Quote Originally Posted by Odysseus View Post
    Possibly. As the Earth's crust cools, it contracts, causing tectonic shifts. The ocean floor would lose heat faster than the surface landmass, so the contractions might be felt more in coastal areas, hence the tsunami in Japan.

    Of course, I'm not the climate expert that Wilbur is... :D
    The only problem with that, is your backwards. The surface landmasses lose heat 5 times faster then the ocean floors would.
    In most sports, cold-cocking an opposing player repeatedly in the face with a series of gigantic Slovakian uppercuts would get you a multi-game suspension without pay.

    In hockey, it means you have to sit in the penalty box for five minutes.
    Reply With Quote  
     

  8. #8  
    Senior Member
    Join Date
    Jun 2005
    Location
    Woodland Park, Colorado, United States
    Posts
    8,563
    If we only had a few thousand more of those ugly Prius' we could stop this global cooling-warming-lukewarming or whatever cycle we are on this week.

    Toyota, please save the planet!
    Education without values, as useful as it is, seems rather to make man a more clever devil.
    C. S. Lewis
    Do not ever say that the desire to "do good" by force is a good motive. Neither power-lust nor stupidity are good motives. (Are you listening Barry)?:mad:
    Ayn Rand
    Reply With Quote  
     

  9. #9  
    LTC Member Odysseus's Avatar
    Join Date
    May 2008
    Location
    FT Belvoir, VA
    Posts
    15,638
    Quote Originally Posted by djones520 View Post
    The only problem with that, is your backwards. The surface landmasses lose heat 5 times faster then the ocean floors would.
    Like I said, I'm not the climate expert that Wilbur is. :D

    I assumed that underwater masses would lose heat faster because I lose heat faster in water than air. :D
    --Odysseus
    Sic Hacer Pace, Para Bellum.

    Before you can do things for people, you must be the kind of man who can get things done. But to get things done, you must love the doing, not the people!
    Reply With Quote  
     

  10. #10  
    Senior Member Bailey's Avatar
    Join Date
    Aug 2010
    Posts
    6,147
    Quote Originally Posted by Odysseus View Post
    Like I said, I'm not the climate expert that Wilbur is. :D

    I assumed that underwater masses would lose heat faster because I lose heat faster in water than air. :D
    Just stick with what you know Colonel, Power point :D
    Reply With Quote  
     

Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •