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 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.
What’s the weather like? Ask a poet! Poetry about weather and other aspects of Earth can be very descriptive. Giving a sense of the environment through their words, poets describe the planet in interesting...more
Landscape painters have been representing clouds in their art for centuries. Different artists with different styles have painted clouds differently. What's more, there are many different types of clouds...more
The Sky Is Low, The Clouds Are Mean The sky is low, the clouds are mean, A travelling flake of snow Across a barn or through a rut Debates if it will go. A narrow wind complains all day How some one treated...more
Water Everything on the earth bristled, the bramble pricked and the green thread nibbled away, the petal fell, falling until the only flower was the falling itself. Water is another matter, has no direction...more
When The Sun Come After Rain When the sun comes after rain And the bird is in the blue, The girls go down the lane Two by two. When the sun comes after shadow And the singing of the showers, The girls...more
The night is darkening round me, The wild winds coldly blow; But a tyrant spell has bound me And I cannot, cannot go. The giant trees are bending Their bare boughs weighed with snow. And the storm is fast...more
I bring fresh showers for the thirsting flowers, From the seas and the streams; I bear light shade for the leaves when laid In their noonday dreams. From my wings are shaken the dews that waken The sweet...more