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Advances in tropical cyclone observation may aid in disaster reduction and prevention

Bioengineer by Bioengineer
March 31, 2021
in Science News
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Credit: Advances in Atmospheric Science

Tropical cyclones — known as typhoons in the Pacific and as hurricanes in the Atlantic — are fierce, complex storm systems that cause loss of human life and billions of dollars in damage every year. For decades, scientists have studied each storm, striving to understand the system yet unable to fully measure every intricate variable. Now, the convergence of new observational tools and the launch of an inclusive database may elucidate the innerworkings of tropical cyclones in the Western North Pacific and South China Sea.

Three papers were published in the latest issue of Advances in Atmospheric Science. One paper, led by the Chinese Meteorological Administration (CMA), focuses on a new tropical cyclone database, and the other two, led by The Petrel Meteorological Observation Experiment Project (Petrel Project) of the CMA, and the Institute of Atmospheric Physics at the Chinese Academy of Sciences respectively, reports an extensive marine observing experiment based on unmanned vehicles.

“The improvement of tropical cyclones prediction accuracy depends not only on the understanding of tropical cyclone dynamics but also on the accuracy of tropical cyclone location and intensity estimations, which is the basis of operational tropical cyclone prediction and research,” said Xiaoqin Lu, Shanghai Typhoon Institute, CMA, and Key Laboratory of Numerical Modeling for Tropical Cyclone, CMA. Lu was first author on the CMA tropical cyclone database paper.

With eight separate datasets, including one compiled by the CMA with measurements dating to 1949, the database comprises historical or real-time locations, intensity, dynamic and thermal structures, wind strengths, precipitation amounts, frequency and more, according to Lu.

“The CMA tropical cyclone database is the only multi-source, multi-timescale, multi-spatial-scale comprehensive tropical cyclone database that covers the western North Pacific,” Lu said. “This database can provide basic scientific support for researchers, forecasters and government departments performing tropical cyclone research, forecasts and disaster reduction planning.”

Tropical cyclone datasets from multiple sources were previously compiled as resources for forecasters and researchers in 2017, and 2019.

“These resources have played an important role in revealing tropical cyclone climatic rules in the western north Pacific and the South China Sea, allowing researcher to search for impact factors with physical significance and finally establish an operational prediction scheme,” Lu said. “We hope that this database will be used for the application of new technologies, such as artificial intelligence, in a wide range of disciplines.”

Developing technology will soon contribute to the database. The first three-dimensional observational data of a tropical cyclone system was obtained by multiple unmanned vehicles in an experiment conducted by 12 institutions under the umbrella of the Petrel Project. A high-altitude large unmanned aerial vehicle (UAV) outfitted with measurement tools flew over Typhoon Sinlaku, a storm system that began at the end of July 2020 and dissipated on Aug. 3. At the same time, a solar-powered marine unmanned surface vehicle (USV) developed by the Institute of Atmospheric Physics actively navigated itself to the eye of the storm. The voyage of the USV is detailed in one of the papers. Two buoys also took observational data during the storm.

“The data contain measurements of 21 oceanic and meteorological parameters acquired by the five devices, along with video footage from the UAV,” said Xuefan Zhang of the Meteorological Observation Center, CMA and first author of the Petrel Project paper. “The data proved very helpful in determining the actual location and intensity of Typhoon Sinlaku. The experiment demonstrates the feasibility of using a high-altitude, large UAV to fill in the gaps between operational meteorological observations of marine areas and typhoons near China, and it marks a milestone for the use of such data for analyzing the structure and impact of a typhoon in the South China Sea.”

The improved ability to take detailed, real-time observational data will help researchers understand how tropical cyclones form and develop, according to Zhang.

Zhang plans to continue conducting comprehensive tropical cyclone observations and use the data to develop an operation system to better understand and predict the storms, and Lu plans to expand and enrich the multi-source database with more field experiments and new equipment to explore the finer details of tropical cyclone structure and operation. According to both researchers, the ultimate goal of their projects is to better understand tropical cyclones in order to help mitigate and reduce disasters.

###

Western North Pacific Tropical Cyclone Database co-authors include Hui Yu, Ming Ying, Bingke Zhao, Shuai Zhang, Limin Lin, Lina Bai and Rijin Wan, all affiliated with the Shanghai Typhoon Institute, CMA, and Key Laboratory of Numerical Modeling for Tropical Cyclone, CMA. The CMA tropical cyclone database was supported by the Key Projects of the National Key R&D Program) and the Key Program for International S&T Cooperation Projects of China.

Petrel Project co-authors include Liangxu Li, Rongkang Yang, Ran Guo, Xia Sun, Daxin Liu, Qiyun Guo, Xiaoxia Li and Xikun Fei, Meteorological Observation Center, CMA; Kebing Tang, AVIC Chengdou Aircraft Industry (Group) Co.; Jianping Luo, Hainan Provincial Meteorological Bureau of the China Meteorological Administration; Hongbin Chen, Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences; Wenwu Peng, Beijing Institute of Radio Measurement, China Aerospace Science and Industry Corporation; Xiaodong Han, AVIC Leihua Electric Technology Research Institute. The Petrel Meteorological Observation Experiment Project of the CMA, Ministry of Science and Technology, supported the Petrel Project.

Media Contact
Ms. Zheng Lin
[email protected]

Original Source

http://english.iap.cas.cn/home/News/202103/t20210331_266805.html

Related Journal Article

http://dx.doi.org/10.1007/s00376-020-0314-1

Tags: Atmospheric ScienceEarth ScienceTechnology/Engineering/Computer Science
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