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Characteristics of Drizzle Mode in the Raindrop Size Distribution Observed at Mount Tsukuba
https://nied-repo.bosai.go.jp/records/7587
https://nied-repo.bosai.go.jp/records/758784e3d0b3-3801-4a29-9d71-d26db92d6431
| Item type | researchmap(1) | |||||||||||||
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| 公開日 | 2026-08-10 | |||||||||||||
| タイトル | ||||||||||||||
| 言語 | en | |||||||||||||
| タイトル | Characteristics of Drizzle Mode in the Raindrop Size Distribution Observed at Mount Tsukuba | |||||||||||||
| 著者 |
Ryohei Misumi
× Ryohei Misumi
× Katsuya Yamashita
× Hiroyuki Kusaka
× Mizuo Kajino
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| 抄録 | ||||||||||||||
| 内容記述タイプ | Other | |||||||||||||
| 内容記述 | Raindrop size distribution (RDSD) is crucial for radar-based precipitation estimation and validating numerical simulation models, especially in mountainous regions where accurate rainfall data is vital for water resource management and disaster mitigation. Previous studies suggest that orographic rainfall is characterized by raindrops with a small mean diameter, yet observations using instruments sensitive to drizzle are scarce. In this study, we investigated the characteristics of RDSDs, including the drizzle mode, on Mount Tsukuba in Japan, using a combination of Meteorological Particle Spectrometer (MPS), Thies Clima Laser Precipitation Monitor (LPM), and METEK Micro Rain Radar (MRR). We constructed a composite RDSD from the MPS (0.1–0.5 mm) and LPM (0.5–5 mm) data and fitted the observations to the generalized gamma distribution model to clarify their features. Our observations revealed that sixty percent of the one-minute RDSDs exhibited a ""drizzle mode"" characterized by high concentrations of small raindrops. Drizzle modes were observed in both moderate stratiform and deep convective rainfall. They occurred more frequently at higher rainfall intensities ( R ) and larger mass-weighted mean raindrop diameters, indicating that the number concentration of large raindrops also increased when the RDSD exhibited a drizzle mode. Furthermore, the relationship between radar reflectivity and R differed markedly depending on whether the RDSD had a drizzle mode. | |||||||||||||
| 言語 | en | |||||||||||||
| 書誌情報 |
en : Journal of Applied Meteorology and Climatology 巻 65, 号 8, p. 1351-1363, 発行日 2026-07-07 |
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| 言語 | en | |||||||||||||
| 出版者 | American Meteorological Society | |||||||||||||
| ISSN | ||||||||||||||
| 収録物識別子タイプ | EISSN | |||||||||||||
| 収録物識別子 | 1558-8432 | |||||||||||||
| DOI | ||||||||||||||
| 関連識別子 | 10.1175/jamc-d-25-0247.1 | |||||||||||||
