Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Extremely Cold Winters and Global Warming

  1. Jan 14, 2007 #1
    Currently where I live, we are experiencing very cold winters (average temperature during the day is about 35 degrees Fahrenheit). Last summer was also a surprise where the average temperature was about 105 degrees Fahrenheit.

    I know that the latter event might be a cause of Global warming, but can the former event possible be a cause of Global warming? I.e. can global warming even cause the temperatures to go extremely down in some regions? If so, how?
  2. jcsd
  3. Jan 14, 2007 #2
    if it's warmer than normal or colder than normal, it's caused by a complex of factors, usually indicated as "weather".

    Weather is about upper air jet streams, air masses of different properties interacting, causing frontal systems and changes in pressure all in a big-merry-go around. Oh yes, and the sun is the star player, always in the limelight, ultimately directing that merry-go-around together with gravity, centrifugal and coriolis forces, water cycles and, and...

    Usually, there are seasonal patterns, also directed by the star. However, sometime they get disturbed. A big spoil sport, for instance, are abnormal warm or cold equatorial oceanic surface currents, known as the El Nino (warm) and La Nina (cold) twin. Currently we have a moderately strong El Nino going which causes the 2007 predictions to be the warmest year in history.

    Also, currently a big and very loyal player is missing, which is highly unusual, The Central Siberia high pressure area. Because of this the generally SW Atlantic flow is exectionally strong causing an abnormal but not unique warm winter in Europe. But as this flow turns southwards again it also causes an extreme cold period in the East. There is a severe shortage of heaters in Qatar. Apparantly the impact of the missing Siberian static high area in combination with El Nino has clear global implications.

    The current El Nino is predicted by Theodore Landscheidt in 2003. He also predicted other El Nino's fairly correctly. Elements in his hypothesis are gravitation interaction of the planets to the sun causing variation in sunspot cycles causing variations in solar particle streams, causing changes in cloudiness causing changes in sunlight reaching the ocean, causing ocean warming changes causing El Nino's.

    And then there is global warming erm..yes!! No? But how about yesteryear when the weather was at the other extreme in many places?
    Last edited: Jan 14, 2007
  4. Jan 14, 2007 #3


    User Avatar
    Science Advisor

    Unfortunately, both high and low temperatures are taken as proof and disproof of Global Warming. Both sides are making predictions of all possibl future weather conditions, so no matter what the weather does, both claim that it proveas their point.
  5. Jan 14, 2007 #4
    Putting more energy into the atmosphere initially causes more contrasting and ordered weather patterns (such as the activity in jet streams) but over time, with increasing entropy, "global warming" manifests mostly as the increase of global temperature.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook