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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 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 image shows the location of the country of Mexico and its capital, Mexico City. Mexico City is where the MILAGRO campaign took place.
Click on image for full size

Introduction to Milagro

Did you know that air pollution can hurt people, animals, buildings and even plants!? Air pollution makes it hard to see and hard to breathe. It can also affect our weather and climate.

We need to study air pollution so we can better understand how to stop its negative effects. Scientists are doing this in a project called MILAGRO. MILAGRO stands for Megacity Initiative: Local and Global Research Observations. Those big words really mean that a team of scientists from around the world are in Mexico City to study the atmosphere there. The project started in March 2006.

During MILAGRO, the scientists are using airplanes, radars, weather balloons, computers, and other instruments to study the atmosphere in and around Mexico City. The purpose is to learn more about the chemistry of air pollution given off by very large cities called megacities.

Hopefully, what is learned during MILAGRO can be applied to other megacities around the world. This will help our Earth be a better place to live!

Last modified March 15, 2006 by Randy Russell.

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