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.

Under the Arctic Sea Ice

In 2005, thirty-five scientists spent a month in the Arctic Ocean studying the little-known marine life that exists within and below the sea ice and on the seafloor. During their voyage, scientists found amazing species, some of which had never been described.

As part of their studies, specially trained scuba divers, called ice divers, collected incredible photographs and video that show what it is like to be under the Arctic sea ice. Take a look at some of their photos below!

Ice divers Katrin Iken (left) and Elizabeth Calvert (right) get into the chilly waters of the Arctic Ocean. The icebreaker, a US Coast Guard Cutter, that got them out to this location is in the background. Do you see the ice behind the divers?

This diver is holding an underwater camera. The sea ice is above the divers head. Do you see the bubbles? This is the air that the divers has exhaled.

Sea ice moves on the ocean surface. These pieces of sea ice have pushed together, forming a pressure ridge. Below the pressure ridge, there is a somewhat protected habitat for marine life.
These arctic cod are living under the sea ice. Arctic cod prefer temperatures around freezing or just above freezing. Arctic cod are a very important part of the diet of Arctic marine mammals, birds and other fish.
Here's an amphipod, a small shrimp-like animal that lives on the underside of the sea ice.
Images courtesy of NOAA Hidden Ocean Expedition
Last modified January 8, 2007 by Lisa Gardiner.

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The Spring 2010 issue of The Earth Scientist, focuses on the ocean, including articles on polar research, coral reefs, ocean acidification, and climate. Includes a gorgeous full color poster!

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