Current Events

  • Irish Chronicles Document Links Between Volcanoes and Weather
    A study of over 40,000 written entries in Irish Annals and ice core measurements shows a strong corr...Read more

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    Irish Chronicles Document Links Between Volcanoes and Weather

    A study of over 40,000 written entries in Irish Annals and ice core measurements shows a strong correlation between the occurrence of volcanic eruptions and extreme cold weather in Ireland over a 1200 year period. Data analyzed in this study cover the period from 431 to 1649, during which time up to 48 volcanic eruptions are identified in Greenland ice core records through deposition of volcanic sulfate in annual layers of ice. You can find the study (open access), published on 6 June 2013 in IOP Publishing's journal Environmental Research Letters, at http://iopscience.iop.org/1748-9326/8/2/024035/article. Find out more about how volcanoes can influence climate.
  • EF-5 Tornado in El Reno, Oklahoma Widest Ever Recorded in US
    The EF-5 tornado that hit El Reno, Oklahoma on May 31st was the widest ever recorded in the US, acco...Read more

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    EF-5 Tornado in El Reno, Oklahoma Widest Ever Recorded in US

    The EF-5 tornado that hit El Reno, Oklahoma on May 31st was the widest ever recorded in the US, according to the National Weather Service in Norman Oklahoma. The tornado, which remained on the ground for 40 minutes and reached 2.6 miles across (4.2 km), took the lives of 18 people including storm chasers Tim Samaras, Paul Samaras and Carl Young. For more information on the tornado, visit http://ow.ly/i/2hfDG.
  • 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.
This total solar eclipse in 1980 was photographed from Palem, India.
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High Altitude Observatory and Rhodes College

High Altitude Observatory

Scientists at the High Altitude Observatory (HAO) try to understand the changes we see in the Sun over time. They also study how these changes affect the atmosphere of the Earth. There are four main areas of study at HAO.

Some people try to understand the structure of the inside of the Sun, and how it changes over time. They collect detailed facts about the Sun, and try to learn about the basic processes that affect it.

Others focus on the magnetism of the Sun and the events we see near the surface. This connects the study of the conditions on the inside with the activity in the hot gas above the surface.

Another group of scientists build tools to observe the atmosphere of the Sun, and try to understand the changes we see over hours or even years. Radiation and particles move out from the Sun, sometimes in sudden eruptions.

As the light and gas from the Sun reaches the Earth, others study the impact of the Sun's output on the magnetism and atmosphere of our planet. This helps us protect satellites and astronauts, and teaches us how the Sun affects our climate.

Last modified February 9, 2005 by Travis Metcalfe.

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