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  • Atmospheric CO2 Level Tops 400 ppm
    During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm rep...Read more

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    Atmospheric CO2 Level Tops 400 ppm

    During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm repeatedly. Daily levels of CO2 can vary due to weather, and there are seasonal trends as well. The level of atmospheric greenhouse gases continues to increase, now over 120 ppm since the Industrial Revolution began. For more on the Keeling Curve, see http://keelingcurve.ucsd.edu/. Find out more about greenhouse gases and warming.
  • Massive Tornado Outbreak on Tornado Alley
    The week of May 19 brings dozens of tornadoes to Tornado Alley in the states of Oklahoma, Kansas, Io...Read more

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    Massive Tornado Outbreak on Tornado Alley

    The week of May 19 brings dozens of tornadoes to Tornado Alley in the states of Oklahoma, Kansas, Iowa, Illinois and Missouri. On May 20th, a massive tornado struck Moore, Oklahoma, devastating communities - destroying over 100 homes and hitting two elementary schools and a hospital - with many casualties and deaths. Our thoughts are with our friends and colleagues suffering from these storms. For more on the May 20th storms, see the NOAA Storm Prediction Center Storm Report.
  • Kansas Legislator Proposes Bill to Outlaw Sustainability Education
    A bill has been introduced in the Kansas legislature this week that would prohibit the promotion of ...Read more

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    Kansas Legislator Proposes Bill to Outlaw Sustainability Education

    A bill has been introduced in the Kansas legislature this week that would prohibit the promotion of sustainability. Here is a link to the one-page bill: http://www.kslegislature.org/li/b2013_14/measures/documents/hb2366_00_0000.pdf. See report on Bloomberg News.
Hunters in the Snow by Pieter Breughel. Breughel captured the long winters of the Little Ice Age in this 1565 painting.
Click on image for full size
Caspar Ammann

The Little Ice Age

From about 1250 to 1850 temperatures were a bit colder than usual in most parts of the world. This time is called the Little Ice Age.

During the Little Ice Age, the average temperature of the planet was about a degree Celsius cooler than it is today (that’s 2-3 degrees Fahrenheit). Scientists think that the planet was cooler because there was less solar activity and more erupting volcanoes. The Little Ice Age was not a true ice age because it did not get cold enough for long enough to cause ice sheets to grow larger. The cooling likely affected areas around the world but we have the most records of how it changed daily life from Europe. Listed below were some of the things we know happened during the Little Ice Age.

  • Fur trappers reported that southern Hudson Bay remained frozen for about 3 weeks longer each spring.
  • Fishermen reported large amounts of sea ice floating in the North Atlantic.
  • British people saw Eskimos paddling canoes off the coast of England.
  • Alpine (mountain) glaciers grew larger.
  • Winters were longer and growing seasons shorter according to tree ring data and records of cherry tree flowering.
  • Wet weather caused disease that affected people, animals and crops including the plague. The plague is also called the Black Death. It was a disease that killed more than a third of Europeans.
  • Because farmers couldn’t grow food, people went hungry in areas of northern and Eastern Europe. Unlike today, there was no way to transport food from far away.
Last modified June 20, 2008 by Lisa Gardiner.

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