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  1. 防災科研関係論文

Early detection of convective echoes and their development using a ka-band radar network

https://nied-repo.bosai.go.jp/records/4977
https://nied-repo.bosai.go.jp/records/4977
3afc3d57-0061-4b6d-ab8e-c94001fe3bfd
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 en
タイトル Early detection of convective echoes and their development using a ka-band radar network
著者 Syo Yoshida

× Syo Yoshida

en Syo Yoshida

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Ryohei Misumi

× Ryohei Misumi

en Ryohei Misumi

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Takeshi Maesaka

× Takeshi Maesaka

en Takeshi Maesaka

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抄録
内容記述タイプ Other
内容記述 Cumulonimbus clouds, which cause local heavy rainfall and urban floods, can develop within 20 min after being detected by operational centimeter-wavelength (X-, C-, or S-band) weather radars. To detect such clouds with greater lead times, Ka-band radars at a wavelength of 8.6 mm together with operational X-band radars were used in this study. The vertically averaged radar reflectivity (VAR) of convective echoes detected by the Ka-band and X-band radars were defined as mesoscale cloud echoes (MCEs) and mesoscale precipitation echoes (MPEs), respectively. The time series of each echo was analyzed by an echo tracking algorithm. On average, MCEs that developed into MPEs (denoted as developed MCEs) were detected 17 min earlier than the MPEs and 33 min earlier than the peak time of the area-averaged VAR (VARa) for MPEs. Some MCEs dissipated without developing into MPEs (denoted as non-developed MCEs). There were statistically significant differences between the developed and non-developed MCEs in terms of the maximum VARa values, maximum MCEs areas, and increase amounts of the VARa values and MCE areas for the first 6?12 min after their detection. Among these indicators, the maximum VARa for the first 9 min showed the most significant differences. Therefore, an algorithm for predicting MCE development using this indicator is discussed.
言語 en
書誌情報 en : Weather and Forecasting

巻 36, 号 1, p. 253-264, 発行日 2021
ISSN
収録物識別子タイプ EISSN
収録物識別子 1520-0434
DOI
関連識別子 10.1175/WAF-D-19-0233.1
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