An especially cold winter in Europe, lots of snow in Scandinavia or lots of rain in the Mediterranean are all symptoms of what meteorologists call the North Atlantic Oscillation, but a group of Penn State researchers has gone beyond the symptoms to try to decipher the dynamics of this atmospheric pattern.
"Some scientists argue that the impact of the NAO on global climate is comparable to El Nino," says Dr. Sukyoung Lee, associate professor of meteorology. "However, most of the scientific communitys analyses to date have been of monthly or seasonal averages which fail to reveal the intrinsic nature of the NAO." The fundamental dynamic process of the North Atlantic Oscillation is on a two-week scale, says Dr. Christian Franzke, postdoctoral fellow in meteorology, referencing an earlier work by Dr. Steven Feldstein, senior research associate, Penn States Environmental Institute. Looking at seasonal data does not really say anything about the causes or mechanisms of the phenomenon. Franzke presents this research at the fall meeting of the American Geophysical Union today (Dec. 9).
The NAO is best known as a pressure difference between the air over Iceland and the air over the Azores – located in the middle of the Atlantic on a latitude with Lisbon, Portugal. If pressure is higher than usual over Iceland, it is colder in Europe during the winter and there is more rain in the Mediterranean. If pressure is anomalously low over Iceland, there are more storms and precipitation in Europe, a milder winter and there is less rain in the Mediterranean.
Andrea Elyse Messer | EurekAlert!
Research icebreaker Polarstern begins the Antarctic season
09.11.2018 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung
Far fewer lakes below the East Antarctic Ice Sheet than previously believed
08.11.2018 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung
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...
Physicists at ETH Zurich demonstrate how errors that occur during the manipulation of quantum system can be monitored and corrected on the fly
The field of quantum computation has seen tremendous progress in recent years. Bit by bit, quantum devices start to challenge conventional computers, at least...
09.11.2018 | Event News
06.11.2018 | Event News
23.10.2018 | Event News
13.11.2018 | Life Sciences
13.11.2018 | Life Sciences
13.11.2018 | Awards Funding