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Cyclones are 10% stronger

12.03.2020

Ultra-precise computer simulations conducted by the NCAR Atmospheric Research Center in Boulder, Colorado, USA, have shown that global warming has significantly increased the destructive power of tropical cyclones and caused them to move deep into the Australian continent, according to a climate scientists report released on Wednesday by the Australian Association of Insurance Companies (IAG ).

According to scientists, in the last 5 years, the intensity and destructive power of tropical cyclones hitting the northern coast of the continent has increased by almost 10%.

This data was confirmed by another group of experts - a team of meteorologists, hydrologists, engineers and mathematicians, assembled by IAG after the floods in Queensland last February. Through extensive field research and computer simulations, scientists have found that rising temperatures in the oceans surrounding Australia have caused tropical cyclones to increasingly remain strong enough to move deeper into Australia.

According to meteorologists, cyclones will move further south, affecting densely populated areas of the continent. An increase in sea temperature of just 1 ° above + 26 ° can increase the power of a cyclone by one category, making a typhoon out of a storm.

Information from computer simulations convincingly indicates that the advance of cyclones to the south is just a matter of time. The area of ​​the tropics is expanding towards the poles, which means that regions with tropical weather systems are also growing and will experience a constant increase in the number of cyclones and their intensity.

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Random news from the Archive

Spiral fiber on a microchip 09.12.2013

Specialists at the California Institute of Technology have created a prototype of a light-delaying chip in which an electromagnetic pulse loses an order of magnitude less energy than in analogues.

The new device delays the light for a time that corresponds to passing through 50 m of fiber. A key feature is the use of a specially designed light guide: absorption losses are only 0,05 dB / m versus 1 dB / m for previous similar elements. Due to less absorption, scientists increased the length of the trajectory and, as a result, the delay time of the pulse.

The light guide is coiled and has the shape of a semicircular groove in the silicon array. On the sides, it is partially covered by a horizontal "canopy" of silicon oxide. The groove is about 150 µm wide, about 100 µm deep, and about 50 µm wide. It was possible to obtain such a groove seven meters long by lithography and etching with hydrofluoric acid with xenon difluoride. The hydrofluoric acid, HF, removed the silicon oxide, and the xenon difluoride, XeF2, dissolved the silicon substrate.

By varying the duration of the action of chemicals during etching, scientists could change the shape of the grooves. The expansion under the layer of silicon oxide is obtained due to the fact that pure silicon dissolves faster than the oxide.

This method of production, according to scientists, is compatible with modern technologies and can be implemented in industry, and not just in the laboratory. Chips that delay light for a while are needed for signal processing in a wide variety of applications, including radar scanning and telecommunications systems. They are in demand, including by military developers, so the work was funded by DARPA, the Pentagon Advanced Research Office.

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