One of the first global-scale simulations of dust and climate from preindustrial times to the year 2100 projects a worldwide decrease in airborne dust of 20–63% by the end of this century. The computer model studies show less wind, more moisture, and enhanced vegetation in desert areas as carbon dioxide increases over the next century, keeping more of the worlds dust on the ground. Coauthor Natalie Mahowald of the National Center for Atmospheric Research presented the results this week at the American Geophysical Unions annual meeting in San Francisco.
"Reductions in global dust levels could have a profound impact on future climate predictions," says Mahowald. Dust helps to lower global temperature by reflecting sunlight, as well as by depositing iron in the ocean and thus fertilizing marine organisms that remove carbon dioxide from the atmosphere.
Mahowald and Chao Luo (University of California, Santa Barbara) combined NCARs global Climate System Model with other software specifically tailored to simulate dust under a variety of climate regimes. The climate changes are driven primarily by an increase in atmospheric carbon dioxide from 280 parts per million in 1890 (preindustrial) to 500 ppm by 2090--a scenario considered reasonable by the Intergovernmental Panel on Climate Change.
Anatta | EurekAlert!
Massive impact crater from a kilometer-wide iron meteorite discovered in Greenland
15.11.2018 | Faculty of Science - University of Copenhagen
The unintended consequences of dams and reservoirs
14.11.2018 | Uppsala University
Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"--the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion--in the Earth's magnetotail, the magnetic environment that trails behind the planet.
Magnetic reconnection has remained a bit of a mystery to scientists. They know it exists and have documented the effects that the energy explosions can...
Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.
Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...
Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.
In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...
On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.
When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure
Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...
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06.11.2018 | Event News
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16.11.2018 | Health and Medicine
16.11.2018 | Life Sciences
16.11.2018 | Life Sciences