Surrounded by winter snow and ice, melting seems like a good thing, but, on a global scale, the melting of ice sheets and glaciers is a sign of global warming, according to a Penn State glaciologist.
"The really big picture shows change in the ice and those changes look like what we get is a world that is a little warmer," says Dr. Richard B. Alley, the Evan Pugh Professor of Geosciences. "We currently do not include all these processes in the models that predict the global future."
Summarizing published literature, Alley notes that spring snows in the Arctic have decreased without a decrease in overall precipitation. A shift in the snowy season is an indication of warming. As seen by satellites, Arctic sea ice is smaller and sea ice thickness measured by submarines is thinner.
A’ndrea Elyse Messer | EurekAlert!
Volcanoes and glaciers combine as powerful methane producers
20.11.2018 | Lancaster University
Massive impact crater from a kilometer-wide iron meteorite discovered in Greenland
15.11.2018 | Faculty of Science - University of Copenhagen
Innsbruck quantum physicists have constructed a diode for magnetic fields and then tested it in the laboratory. The device, developed by the research groups led by the theorist Oriol Romero-Isart and the experimental physicist Gerhard Kirchmair, could open up a number of new applications.
Electric diodes are essential electronic components that conduct electricity in one direction but prevent conduction in the opposite one. They are found at the...
Max Planck researchers revel the nano-structure of molecular trains and the reason for smooth transport in cellular antennas.
Moving around, sensing the extracellular environment, and signaling to other cells are important for a cell to function properly. Responsible for those tasks...
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...
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21.11.2018 | Power and Electrical Engineering
21.11.2018 | Life Sciences