Model simulations indicate that 21st century greenhouse warming may lead to greater numbers of very intense Atlantic hurricanes and higher hurricane rainfall rates, but fewer hurricanes overall.
Century-long basin-wide observed records of very intense Atlantic hurricanes are considered unreliable, but tropical storm and hurricane counts have been used as long-term climate indicators. Unadjusted counts of tropical storms show a significant rise from the mid to late 1800s to present, while unadjusted hurricane counts do not, due to the large number of reported hurricanes in the late 1800s.
Analysis of historical ship track records suggests that reporting coverage was likely too sparse to detect all tropical storms, and after adjusting for this bias, tropical storm counts have no significant trend over 1878-2006.
A regional downscaling atmospheric model reproduces the observed rise and year-to-year variability in hurricane counts (1980-2006) remarkably well when forced with observed sea surface temperatures and large-scale atmospheric conditions. According to this model, the ensemble late 21st century climate change projected by current Intergovernmental Panel on Climate Change global models implies reduced numbers of Atlantic hurricanes and tropical storms, due mainly to increased vertical wind shear.
Downscaling experiments with several high resolution models indicate that despite a projected reduction in overall hurricane numbers, the number and intensity of the strongest hurricanes may increase.
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...
09.11.2018 | Event News
06.11.2018 | Event News
23.10.2018 | Event News
16.11.2018 | Health and Medicine
16.11.2018 | Life Sciences
16.11.2018 | Life Sciences