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无人艇组网观测台风的设想

Networked USVs for Typhoon Observation: A Conceptual Framework

  • 摘要: 登陆和近海台风伴随的暴雨、大风和风暴潮等经常造成重大人员伤亡和财产损失,目前对台风的快速增强、路径突变和生成机制这三大难点科学问题的认识还存在不足,主要原因之一是台风全生命期内部及环境多要素原位(in situ)高时空分辨率观测资料的缺乏。为了解决海上台风观测资料匮乏问题,中国科学院大气物理研究所无人艇团队自主研制了两款长航时半潜式无人艇,并开展了多次海上试验。为了全面系统地获取台风演变过程中气象和海洋多要素场变化的信息,本文提出无人艇组网观测台风的设想。采用自动部署的太阳能无人艇和带探空设备的油电无人艇,在我国南海热带气旋频发和西太平洋台风经过的海域构建一个无人艇组网观测系统,开展长期的台风观测试验。通过机动性强的太阳能无人艇获取海面气象水文多要素观测数据,使用油电艇载火箭探空技术获取台风内部大气边界层的廓线资料,组网观测能够实时获取海上热带气旋内部及其环境场的原位观测资料。对收集的同期卫星观测产品和再分析资料等进行验证对比分析,形成一套多个南海热带气旋的综合观测资料集,为数值预报模式资料同化和效果检验提供第一手资料,提高模式对台风路径、强度以及暴雨和大风的预报能力。

     

    Abstract: Landfalling and offshore typhoons often result in significant casualties and property damage due to associated hazards such as torrential rainfall, strong winds, and storm surges. Three key scientific challenges related to typhoons, namely rapid intensification, sudden track changes, and formation mechanisms, remain poorly understood because of the lack of high spatiotemporal resolution in situ observational data covering internal dynamics and environmental factors throughout the complete lifecycle of typhoons. To address the scarcity of marine typhoon observation data, the unmanned surface vehicle (USV) team from the Institute of Atmospheric Physics, Chinese Academy of Sciences, independently developed two long-endurance, semi-submersible USVs and conducted multiple sea trials. This paper presents the novel concept of networked unmanned vehicle observation systems for obtaining comprehensive meteorological and oceanic multi-element field information during typhoon evolution processes. For long-term typhoon observation, a network observation system employing an automatically deployed solar-powered USV and oil-electric powered USV with sounding equipment is being proposed across the typhoon-active South China Sea and western Pacific transit regions. The highly maneuverable solar-powered USVs can acquire multi-element observational data, including meteorology and hydrology data at the sea surface, while the oil-electric powered USV equipped with rocket-based sounding technology can obtain vertical profiles of the atmospheric boundary layer within typhoons. The UAV networked observation system can enable real-time in situ collection of observational data from the internal structure of marine tropical cyclones and their ambient environmental fields. The collected data will be validated through comparative analysis against concurrently acquired satellite observation products and reanalysis data to provide a comprehensive observational dataset for multiple South China Sea tropical cyclones. This first-hand dataset will support data assimilation and forecast verification for numerical prediction models, ultimately enhancing their capability in forecasting typhoon track typhoons, intensity, as well as heavy rainfall and gale-force winds.

     

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