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中国东部雨季雨滴大小分布的地理特征
Hong Wang1,2,3,4, Jun Wang5, Guangzhi Ren1
1Key Laboratory for Meteorological Disaster Prevention and Mitigation of Shandong, Jinan, Shandong, China.
Scientific reports
|July 24, 2025
概括
雨滴大小分布 (DSD) 分析揭示了岛屿站与内陆大陆式模式相比,具有明显的海上特征. 这些发现对于提高降水估计准确度至关重要.
科学领域:
- 大气科学 大气科学
- 气象学 天气学
- 水文学的水文学
背景情况:
- 雨滴大小分布 (DSD) 对于理解降水微物理和增强定量降水估计 (QPE) 是至关重要的.
- 地理位置显著影响DSD特征,影响天气模型和气候研究.
研究的目的:
- 利用中国东部8年的度仪数据,分析DSD的地理分布特征.
- 为了比较一个岛屿站 (ISL) 和一个内陆平原站 (INL) 之间的DSD,微物理过程和关系 (μ-Λ,Z-R).
主要方法:
- 利用了来自两个不同的地理位置的八年度仪数据:一个岛屿站 (ISL) 和一个内陆平原站 (INL).
- 分析了雨滴大小分布 (N(D),μ-Λ关系,以及特定于降水的Z-R关系.
- 研究了碰撞断裂过程和极端DSD (EDSD) 的流行情况.
主要成果:
- 观察到明显的DSD峰值:在ISL处0.56毫米,在INL处0.69毫米. 在ISL中,小雨滴的度较高,大雨滴的度较低.
- 流动性降水在ISL显示了类似海上特征,在INL显示了类似大陆的特征. μ-Λ 关系表示在 ISL 处较低的 μ 值,相当于 Λ.
- 发现Z-R关系更依赖于降水类型 (分层与对流) 而不是地理区域. 碰撞断裂在INL (17%的EDSD) 比ISL (10%的EDSD) 更为突出.
结论:
- 地理位置显著调节雨滴大小分布,影响海洋与大陆降水特征.
- 降水类型是Z-R关系的主要决定因素,在本研究中优先考虑区域影响.
- 与岛屿站相比,内陆站经历了更频繁和更强烈的碰撞破裂过程.
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