Current Events

  • 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.
This map shows the South Pole of Enceladus. Enceladus is a moon of Saturn. Can you see the huge "tiger stripe" cracks in this view? They go from upper left to lower right across the map.
Click on image for full size
Image courtesy of DLR and NASA/JPL/Cassini Imaging Team.

The South Pole of Enceladus

Enceladus is an icy moon of Saturn. The South Pole of Enceladus is one of the strangest places in the Solar System.

There are several huge cracks in the surface of Enceladus near its South Pole. The cracks are more than 100 km (62 miles) long. These giant cracks have been nicknamed "tiger stripes". Strangely, the South Pole of Enceladus is the warmest place on the moon. The areas near the tiger stripes are warmest of all. What is going on there?

Scientists think there might be underground lakes or seas of liquid water. Something is heating the area near the South Pole, keeping the water from freezing. Some of the water makes it to the surface of the moon through cracks. When it does, it erupts from geysers as ice crystals!

The ice from the geysers is thrown hundreds of kilometers above the surface of Enceladus. Some ice crystals leave the moon and go into orbit around Saturn. The ice makes up part of one of Saturn's rings! Some ice falls back onto Enceladus. This makes the moon very bright and shiny, as if it were covered with fresh snow.

Last modified January 20, 2009 by Randy Russell.

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