Research about stratosphere damage helps us understand the ozone layer better, include Antarctic ozone "hole" that is three times larger than the entire land mass of the United States—the largest such area ever observed. (Image courtesy the TOMS science team & and the Scientific Visualization Studio, NASA GSFC via Visible Earth at http://visibleearth.nasa.gov)
Researchers quantify stratosphere damage with an eye toward ozone hole recovery
A new atmospheric model is able to quantify man-made versus naturally occurring damage to the stratosphere with an eye toward repairing the diminishing ozone layer that is located within the stratosphere. That’s the premise of a paper published in this week’s Science titled, “Anthropogenic and Natural Influences in the Evolution of Lower Stratospheric Cooling.”
Researchers used a model to observe the stratosphere, the layer above the troposphere, and better understand what has contributed to its cooling over the past approximately 25 years. The stratosphere contains the ozone layer, which absorbs sunlight and heats the stratosphere. This long-term cooling trend is generally accepted to result from the loss of the ozone layer as a result of man-made influences. However, the cooling trend is not uniform like ozone loss, but rather broken into a series of jumps or discontinuities. These jumps are associated with major volcanic (El Chichon in 1982 and Mt. Pinatubo in 1991) eruptions that inject aerosols into the stratosphere. The aerosols also absorb sunlight and heat the stratosphere, thus temporarily offsetting the cooling trend from ozone loss. The volcanic eruptions are considered to be a "natural" forcing.
Breakthrough with a chain of gold atoms
17.02.2017 | Universität Konstanz
New functional principle to generate the „third harmonic“
16.02.2017 | Laser Zentrum Hannover e.V.
In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport
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The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.
The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...
Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...
Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".
Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...
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17.02.2017 | Medical Engineering
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