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Open AccessArticle

An Automatic Recognition Method for Airflow Field Structures of Convective Systems Based on Single Doppler Radar Data

School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
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Author to whom correspondence should be addressed.
Atmosphere 2020, 11(2), 142; https://doi.org/10.3390/atmos11020142
Received: 23 October 2019 / Revised: 20 January 2020 / Accepted: 24 January 2020 / Published: 27 January 2020
(This article belongs to the Special Issue Weather Radar Applications on Meteorology and Hydrology in East Asia)
Airflow structures within convective systems are important predictors of damaging convective disasters. To automatically recognize different kinds of airflow structures (the convergence, divergence, cyclonic rotation, and anticyclonic rotation) within convective systems, an airflow structure recognition method is proposed, in this paper, based on a regular hexagonal template. On the basis of single Doppler radar data, the template is designed according to the appearance model of airflows in radial velocity maps. The proposed method is able to output types and intensities of airflow structures within convective systems. In addition, the outputs of the proposed method are integrated into a projection map of the airflow field structure types and intensities (PMAFSTI), which is developed in this work to visualize three-dimensional airflow structures within convective cells. The proposed airflow structure automatic recognition method and the PMAFSTI were tested using three typical cases. Results of the tests suggest the following: (1) At different evolution stages of the convective systems, e.g., growth, split, and dissipation, the three-dimensional distribution of the airflow fields within convective systems could be clearly observed through the PMAFSTI and (2) on the basis of recognizing the structures of the airflow field, the complex airflow field, such as a squall line, could be further divided into several small parts making the analysis of convective systems more scientific and elaborate.
Keywords: single doppler radar; airflow field; automatic recognition; convective systems; airflow type; airflow intensity single doppler radar; airflow field; automatic recognition; convective systems; airflow type; airflow intensity
MDPI and ACS Style

Wang, P.; Gu, K.; Hou, J.; Dou, B. An Automatic Recognition Method for Airflow Field Structures of Convective Systems Based on Single Doppler Radar Data. Atmosphere 2020, 11, 142.

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