They have been considered merely a myth until recently, when new studies using technological developments like buoys, radars and satellites have scientifically proven the existence of rouge waves, and that they exist in much higher numbers than it was ever expected.
These rogue waves could be the cause of tragic accidents at sea, not only because of their immense power and heights that reach over 30 meters, but it is their unpredictable nature that poses a bigger threat; they emerge as unexpected mighty walls of water towering from calm seas.
This is why Jose Carlos Nieto, a researcher from the Universidad de Alcalá, Madrid in collaboration with the German research centre GKSS have developed a software tool that can detect these waves and monitor their evolution in time and space. There are currently other methods of detection, like wave rider buoys to measure the height of waves at sea, but the information they provide is not as complete since buoys only measure the waves at a single point at sea, thus lacking the spatial dimension. This software detects the wave front from a radar image and is now being commercialised by a spin-off company of the GKSS.
The image of the sea that forms on a radar screen is the result of different mechanisms of interaction between the electromagnetic energy emitted by the radar and the sea surface. The detection of the reflected energy from the wave by the system does not depend so much on the wave’s height, but on other factors such as the wind and wave inclination. The tool developed by Professor Nieto from the signal theory department of the Universidad de Alcalá translates the radar image into a measurement of the elevation of the waves. The software uses a mathematical model to evaluate and process by different mechanisms the radar image that is generated and another model to determine the spatial and temporal dimensions of the waves.
The image on the left corresponds to the raw radar image, while the one on the right is the image once processed by the software. Thanks to the colour code it can be appreciated that higher waves propagate as a group. This effect is called wave grouping and has a great relevance for the safety of marine structures such as ships, dikes, platforms. The software can be used to provide warning of an approaching extreme wave, giving time to prepare and minimise its effects. The accurate wave dynamics that the software provides could also be used to predict the precise trajectory of oil spills and other contaminants that float on the sea, and it is on this application that most of the current investigation is being carried out at the Universidad de Alcalá by Professor Nieto, member of the High frequency technology group, among other specialists like physicists and telecommunications engineers from the signal theory department of the UAH.
Oficina de Información Científic | alfa
Rare Earth Elements in Norwegian Fjords?
06.08.2020 | Jacobs University Bremen gGmbH
Rock debris protects glaciers from climate change more than previously known
05.08.2020 | Northumbria University
Scientists at the Fraunhofer Institute for Laser Technology ILT have come up with a striking new addition to contact stamping technologies in the ERDF research project ScanCut. In collaboration with industry partners from North Rhine-Westphalia, the Aachen-based team of researchers developed a hybrid manufacturing process for the laser cutting of thin-walled metal strips. This new process makes it possible to fabricate even the tiniest details of contact parts in an eco-friendly, high-precision and efficient manner.
Plug connectors are tiny and, at first glance, unremarkable – yet modern vehicles would be unable to function without them. Several thousand plug connectors...
An international research team has found a new approach that may be able to reduce bone loss in osteoporosis and maintain bone health.
Osteoporosis is the most common age-related bone disease which affects hundreds of millions of individuals worldwide. It is estimated that one in three women...
Traditional single-cell sequencing methods help to reveal insights about cellular differences and functions - but they do this with static snapshots only...
“Core-shell” clusters pave the way for new efficient nanomaterials that make catalysts, magnetic and laser sensors or measuring devices for detecting electromagnetic radiation more efficient.
Whether in innovative high-tech materials, more powerful computer chips, pharmaceuticals or in the field of renewable energies, nanoparticles – smallest...
An international research team with Prof. Cornelia Denz from the Institute of Applied Physics at the University of Münster develop for the first time light fields using caustics that do not change during propagation. With the new method, the physicists cleverly exploit light structures that can be seen in rainbows or when light is transmitted through drinking glasses.
Modern applications as high resolution microsopy or micro- or nanoscale material processing require customized laser beams that do not change during...
23.07.2020 | Event News
21.07.2020 | Event News
07.07.2020 | Event News
06.08.2020 | Earth Sciences
06.08.2020 | Power and Electrical Engineering
06.08.2020 | Life Sciences