The ozone layer is a protective layer of gas in the stratosphere between 15 and 35km that absorbs most harmful solar UV radiation before it reaches the Earth’s surface. In the 1970s, it was discovered that reactive inorganic chlorine gases in the stratosphere catalyze ozone depletion in the springtime. In response, the use of industrial chlorine sources has been phased out by the 1987 Montreal...
In numerical weather prediction and climate models a particular challenge is represented by the simulation of mixed-phase clouds. These clouds occur in a temperature range between 0°C and -38°C, their hydrometeors can either consist of supercooled water or of ice, and the coexistence of both is very likely. The partitioning into liquid and ice in this regime depends on many factors (e.g. cloud...
Previous studies have obtained contradicting results on the impact of Cloud condensation nuclei (CCN) concentration on microphysical processes within thunderstorms and the resulting surface precipitation. In this work, an analysis of the ``microphysical pathways'' occurring in these clouds, with a particular emphasis on the formation of large hail and heavy precipitation, is proposed to...
The loads affecting an operating wind turbine are estimated using numerical simulations that aim to reproduce the real interactions between the turbine and the incoming wind. Then, accurate descriptions of both, the physical turbine and the atmospheric wind, to be included in the numerical estimations are essential in the design, manufacturing and operation processes of a wind turbine....
The alpha-decay chain of Rn-222 results to the highest dose contribution from natural radiation and by this exposure to the highest natural risk for developing lung cancer. Therefore, precise and quality assured measurements of radon are of great importance and EU member states are required to implement radon mitigation measures according to the European Council Directive 2013/59/EURATOM.
The...
