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  1. 防災科研関係論文

Impact of Observation Operators on Low-Level Wind Speed Retrieved by Variational Multiple-Doppler Analysis

https://nied-repo.bosai.go.jp/records/5561
https://nied-repo.bosai.go.jp/records/5561
c5747b8b-47b9-441b-b309-f60d07f4d8ca
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 en
タイトル Impact of Observation Operators on Low-Level Wind Speed Retrieved by Variational Multiple-Doppler Analysis
言語
言語 eng
著者 Ken-ichi Shimose

× Ken-ichi Shimose

en Ken-ichi Shimose

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Shingo Shimizu

× Shingo Shimizu

en Shingo Shimizu

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Takeshi Maesaka

× Takeshi Maesaka

en Takeshi Maesaka

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Ryohei Kato

× Ryohei Kato

en Ryohei Kato

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Kaori Kieda

× Kaori Kieda

en Kaori Kieda

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Koyuru Iwanami

× Koyuru Iwanami

en Koyuru Iwanami

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抄録
内容記述タイプ Other
内容記述 This study investigated the impact of observation operators on low-level wind speed analysis. An evaluation of wind speeds retrieved by variational multiple-Doppler analyses using radial velocities (Vr) based on the formats of both a Plan Position Indicator (PPI) (hereafter, PPI-VAR) and a Constant Altitude Plan Position Indicator (CAPPI) (hereafter, CAPPI-VAR) was performed for comparison with wind speeds observed by a wind profiler during the warm season of three consecutive years. The statistical analysis showed that PPI-VAR was more accurate than CAPPI-VAR at 500 m above ground level (AGL). The error of CAPPI-VAR at 500 m AGL was caused by a representative error of CAPPI-formatted Vr derived from a certain radar whose beam height was far from the analysis level, and this error became more obvious the greater the vertical difference in wind speed across the analysis level. CAPPI-VAR uses CAPPI-formatted Vr from each radar equally; thus, the representative error might cause performance degradation of CAPPI-VAR at 500 m AGL. Conversely, PPI-VAR uses PPI-formatted Vr from each radar with appropriate weighting based on the beam height distance from the analysis level. PPI-VAR showed better results at 500 m AGL because the observation grid points were dense around 500 m AGL.
言語 en
書誌情報 en : SOLA

巻 12, p. 215-219, 発行日 2016
出版者
言語 en
出版者 METEOROLOGICAL SOC JAPAN
ISSN
収録物識別子タイプ ISSN
収録物識別子 1349-6476
DOI
関連識別子 10.2151/sola.2016-043
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