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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 ...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.
  • Earth's Center Is 1,000 Degrees Hotter Than Previously Thought, Synchrotron X-Ray Experiment Shows
    Scientists have determined the temperature near the Earth’s center to be 6000 degrees Celsius, 1000 ...Read more

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    Earth's Center Is 1,000 Degrees Hotter Than Previously Thought, Synchrotron X-Ray Experiment Shows

    Scientists have determined the temperature near the Earth’s center to be 6000 degrees Celsius, 1000 degrees hotter than in a previous experiment run 20 years ago. These measurements confirm geophysical models that the temperature difference between the solid core and the mantle above, must be at least 1500 degrees to explain why the Earth has a magnetic field. For more information about this study, see the press release from the European Synchrotron Radiation Facility.
  • Ocean Volcanic Rocks Contain Samples of Recycled Crust
    Scientists have long believed that lava erupted from certain oceanic volcanoes contains materials fr...Read more

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    Ocean Volcanic Rocks Contain Samples of Recycled Crust

    Scientists have long believed that lava erupted from certain oceanic volcanoes contains materials from the early Earth’s crust. But decisive evidence for this phenomenon has proven elusive. New research from a team including Carnegie’s Erik Hauri demonstrates that oceanic volcanic rocks contain samples of recycled crust dating back to the Archean era 2.5 billion years ago. Their work is published in Nature. Oceanic crust sinks into the Earth’s mantle at so-called subduction zones, where two plates come together. Much of what happens to the crust during this journey is unknown. Model-dependent studies for how long subducted material can exist in the mantle are uncertain and evidence of very old crust returning to Earth’s surface via upwellings of magma has not been found until now. For more information about these results, see the press release from the Carnegie Institution.
Chile has some of the world's largest open pit copper mines. This mine, named Chuquicamata, is located near Antofagasta in northern Chile.
Click on image for full size
Image Courtesy of the Wikipedia Commons

Human Impacts in the Southeast Pacific Region

What is the connection between human activity in western Chile and Peru and the Southeast Pacific climate system? Much of this region is very sparsely populated. The lack of rainfall limits where people can live. Most people in this region live in the large coastal or port cities such as Santiago, Valparaiso, Concepcion, Iquique, and Antofagasta in Chile and in Lima and Arequipa in Peru.

Mining is very important in this region. There is a rich variety of minerals, including copper, nitrates, iron, manganese, molybdenum, gold, and silver. This region is one of the world's largest copper-mining centers. The aerosols that are released as part of the copper smelting process will be studied as part of the VOCALS field experiment. This is because aerosols impact the formation of clouds. Learning more about how aerosols impact cloud formation is a key part of VOCALS science.

The nutrient rich coastal waters support a fishing industry that is another important economic activity in this region. Fishing and processing fish are very important especially in larger port cities such as Iquique and Arica. VOCALS scientists are interested in the impact of changing climates on commercial fisheries. If ocean temperatures warm, how will the fish populations be impacted?

Last modified September 19, 2008 by Sandra Henderson.

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