Climate

    • Asteroid Skywriters
      Scientists from the Australian Antarctic Division, the University of Western Ontario, the Aerospace Corporation, and Sandia and Los Alamos national laboratories found evidence that dust from an asteroid burning up as it descended through Earth's atmosphere formed a cloud of micron-sized particles.
      more...
    • The Dog Days of the Permian
      Scientists at the National Center for Atmospheric Research (NCAR) have created a computer simulation showing Earth's climate in unprecedented detail at the time of the greatest mass extinction in the planet's history.
      more...
    • New Window Into Ancient Ozone Holes
      British researchers have hit on a clever way to search for ancient ozone holes and their relationship to mass extinctions: measure the remains of ultraviolet-B absorbing pigments ancient plants left in their fossilized spores and pollen.
      more...
    • Volcanoes Ate Oxygen
      A number of hypotheses have been used to explain how free oxygen first accumulated in Earth's atmosphere some 2.4 billion years ago, but a full understanding has proven elusive. Now a new model offers plausible scenarios for how oxygen came to dominate the atmosphere.
      more...
    • Patient Planet: Then and Now
      The dramatic and, in some cases, damaging environmental changes sweeping planet Earth are brought into sharp focus in a new atlas launched to mark World Environment Day (WED).
      more...
    • Organic-Rich Soup-in-the-Ocean
      A new University of Colorado at Boulder study indicates Earth in its infancy probably had substantial quantities of hydrogen in its atmosphere, a surprising finding that may alter the way many scientists think about how life began on the planet.
      more...
    • Snowball Earth Scenario
      Eons ago, giant clouds in space may have led to global extinctions, according to new research that outlines a rare scenario in which Earth iced over during snowball glaciations, after the solar system passed through dense space clouds.
      more...
    • Urban Smog: State of the World
      Based on 18 months of Envisat observations, this high-resolution global atmospheric map of nitrogen dioxide pollution makes clear just how human activities impact air quality.
      more...
    • Breaking the Ice
      When the vast Larsen B ice shelf broke off the Antarctic Peninsula, no one knew what would happen next to the nearby glacier flows. Would they accelerate and would sea level rise from global temperature changes?
      more...
    • Surfing the Wave
      A tsunami, a series of large waves caused by the disruption of seawater, is one of the many hazards of living on Earth. Bill McGuire, Director of the Benfield Hazard Research Centre, says that a mega-tsunami could cause death and destruction to both the eastern
      more...
    • Ozone: State of the World
      The annual opening of an ozone hole over the South Pole is being watched from orbit. The European Envisat mission sees the thinning from September to December typically.
      more...
    • The Good, the Bad, and the Ozone
      This week NASA will add to its tools for tracking changes in the global climate with the launch of the Aura spacecraft. Primarily geared to imaging atmospheric changes, Aura will answer questions about ozone: the good, the bad and what makes Earth unique among
      more...
    • Unfolding Planet Earth, Version Three
      Modelling the earth's climate requires consideration of changes in land, sea and air. A new simulation enhances the ability to mesh the competing influences to show both climate history and our collective future.
      more...
    • Titanic Primordial Pull
      How the Earth's early climate changed has much to do with the fate of its greenhouses gases, carbon dioxide and methane. A conjecture to test revolves around the continents absorbing carbon dioxide. Akin to what happens today on Saturn's moon Titan also is the
      more...
    • Reflecting on Climate Change
      Earthshine, or the terrestrial light reflected back to us off the moon's darkside, gives a unique mirror to what is happening with our own climate.
      more...