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Apparatus and methods

机译:设备和方法

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In the past two decades, Global Positioning System (GPS)-drop-sonde has been developed as an effective tool to explore the internal structures of tropical cyclones (TCs). To facilitate the short-term forecasting of the TCs' intensity and track over the Hong Kong Flight Information Region (HKFIR), Hong Kong Observatory (HKO) launched in 2016 reconnaissance campaigns by using airborne GPS-dropsondes. On October 7, 2016, when Tropical Storm Aere (1619) got close to Hong Kong, 10 dropson-des were released from a reconnaissance aircraft at 10 km altitude to sample the TC at different storm-relative positions. This offers a valuable opportunity to examine the functional performance of the dropsonde system. In the study, the validity of dropsonde measurements is first examined, mainly by comparing the results with those collected contemporaneously by radiosonde balloons from a nearby station. Observational results of the structural characteristics are then discussed. Evidence was observed for the invasion of the storm's inner structure by background atmosphere, which was unfavourable for the intensification of Aere in the following time. Meanwhile, a height-resolving model of the TCs pressure field is proposed. It is also observed that the parachutes of two dropsondes failed to deploy during the descending period. The results presented here are expected to provide useful information for a better understanding of the in-situ measurements from dropsondes deployed over the HKFIR, and for advancing the knowledge on TC's inner structure.
机译:在过去的二十年中,全球定位系统(GPS)-Drop-Sonde已成为探索热带气旋(TCS)内部结构的有效工具。为了促进TCS的短期预测,在香港航班信息区域(HKFIR),香港观测所(香港福尔),2016年推出的香港天文台(HKO)通过使用空中GPS-Dropsondes推出的侦察活动。 2016年10月7日,当热带风暴Aere(1619)接近香港时,10只蜕商从10公里处的侦察机释放,以在不同的风暴相对位置对TC进行采样。这提供了一个有价值的机会来检查Dropsonde系统的功能性能。在该研究中,首先通过将结果与附近站的无线电钻孔气球相比将结果与从附近站的射频气球进行比较的结果进行检查,主要研究了滴水对测量的有效性。然后讨论了结构特征的观察结果。观察到风暴的内部结构通过背景气氛侵入了证据,这在下列时间内不适合艾雷的强化。同时,提出了TCS压力场的高度分辨模型。还观察到,两个滴剂的降落伞在降序期间未能部署。这里提出的结果有望提供有用的信息,以便更好地了解从HKFIR上部署的Dropsondes的原位测量,以及推进TC内部结构的知识。

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    《Oceanographic Literature Review》 |2020年第12期|2571-2572|共2页
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