Researchers have developed a new remote sensing instrument based on light detection and ranging (LIDAR) that could offer a simple and robust way to accurately measure wind speed. The detailed, real-time wind measurements could help scientists to better understand how hurricanes form and provide information that meteorologists can use to pinpoint landfall earlier, giving people more time to prepare and evacuate.
“As hurricane Harvey approached the U.S., hurricane hunters flew directly into the storm and dropped sensors to measure wind speed,” said Xiankang Dou, leader of the research team at the University of Science and Technology of China (USTC). “Our Doppler LIDAR instrument can be used from a plane to remotely measure a hurricane’s wind with high spatial and temporal resolutions. In the future, it could even make these measurements from aboard satellites.”
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Gravity waves form in the atmosphere as a result of destabilizing processes, for example at weather fronts, during storms or when air masses stroke over mountain ranges. They can occasionally be seen in the sky as bands of cloud. For weather forecast and climate models, however, they are mostly “invisible” due to their short wavelength. The effects of gravity waves can only be taken into consideration by including additional special components in the models. The “MS-GWaves” research unit funded by the German Research Foundation and led by Goethe University Frankfurt has meanwhile further developed such parameterizations and will test them in the second funding period.
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