Loading ...
Sorry, an error occurred while loading the content.

Volcanoes Caused Little Ice Age, Baffin Island Study Suggests

Expand Messages
  • Julienne
    Volcanoes Caused Little Ice Age, Baffin Island Study Suggests First Posted: 01/31/2012 10:41 am Updated: 01/31/2012 10:41 am When the weather suddenly got
    Message 1 of 1 , Jan 31, 2012
    • 0 Attachment
      Volcanoes Caused Little Ice Age, Baffin Island Study Suggests

      First Posted: 01/31/2012 10:41 am Updated: 01/31/2012 10:41 am

      When the weather suddenly got colder in Northern
      Europe a few centuries ago, some people blamed
      witchcraft. But now an international team of
      scientists has identified a more likely cause of the 'Little Ice Age':

      Volcanoes.

      "The new study suggests that the onset of the
      little Ice Age was caused by an unusual,
      50-year-long episode of four massive tropical
      volcanic eruptions," According to a statement
      from the American Geophysical Union. These
      "erupting volcanoes...cooled the planet by
      ejecting shiny aerosol particles that reflected sunlight back into space."

      Normally, the effects would persist for only a
      few years. But study co-author Bette
      Otto-Bliesner, a scientist with the National
      Center for Atmospheric Research, told the Daily
      Mail that "The eruptions could have triggered a
      chain reaction, affecting sea ice and ocean
      currents in a way that lowered temperatures for centuries."

      The cold period, which was kicked off in the 13th
      century and lasted until the 19th, helped define
      Northern European life from before the
      Renaissance through the Industrial
      Revolution—ever wondered why the Old Masters
      painted so many winter scenes? The research was
      “the first time anyone has clearly identified the
      specific onset of the cold times marking the
      start of the Little Ice Age,” said Professor
      Gifford Miller, the geologist at the University
      of Colorado, Boulder who led the study.

      To get these dates, the team radiocarbon-dated
      dead plants from receding ice caps on Baffin in
      Canada. They found that one group of the plants
      had died from 1275-1300 A.D. and another around 1450 A.D.

      Then the researchers compared the dates to the
      layers of ice in a glacial lake in Iceland. The
      stratified ice shows the passage of time and
      changes in the environment, sort of like the
      rings on a tree trunk—when the scientists saw
      volcanic ash deposits at the late-13th century
      and the 15th century marks, it was clear what had caused the plants to die.

      The scientists published their research in the
      January 31 issue of Geophysical Review Letters.

      http://www.huffingtonpost.com/2012/01/31/volcanoes-little-ice-age_n_1243976.html


      The selection of a Republican candidate for the
      presidency of this globalized and expansive
      empire is - and I say this seriously - the
      greatest competition of idiocy and ignorance that
      has ever been. Fidel Castro. January 2012
    Your message has been successfully submitted and would be delivered to recipients shortly.