风对降雨量测量的影响从OTT Parsivel2 Disdrometer获得的测量结果
Enrico Chinchella1,2, Arianna Cauteruccio1,2, Luca G Lanza1,2
1Department of Civil, Chemical and Environmental Engineering, University of Genova, 16145 Genoa, Italy.
Sensors (Basel, Switzerland)
|October 29, 2025
概括
风极大地影响了OTT Parsivel2气流测量仪的降水量测量,在与激光束平行时导致低估. 调整可以纠正这些由风引起的偏差,以改善降雨强度和雷达反射率数据.
科学领域:
- 气象学和大气科学.
- 水文和水资源管理.
- 仪器和测量科学. 仪器和测量科学.
背景情况:
- 准确的降水测量对于各种环境和水文应用至关重要.
- 像OTT Parsivel2这样的光学度仪被广泛使用,但可能容易受到环境因素的影响.
- 风可以改变落下的水星流星的轨迹,可能引入偏差在disdrometer测量.
研究的目的:
- 为了量化风对降水量度的影响,OTT Parsivel2光学度仪进行了测量.
- 为了研究风向和风引起的偏差在度仪读数中的关系.
- 为雨量强度和雷达反射率估计中的风感应错误制定纠正策略.
主要方法:
- 利用计算流体动力学 (CFD) 模拟来模拟OTT Parsivel2.2周围的空气流.
- 在扰乱的空气流中模拟雨滴轨迹,以量化风引起的偏差.
- 为了处理后的纠正,推导出场地独立的捕捞比率.
- 使用样本滴量分布计算了对降雨强度和雷达反射率的影响.
主要成果:
- 观测到显著的风引起的速度场干扰在disdrometer周围,严重依赖于风向.
- 对一系列环境条件的量化风诱导偏差,揭示了与激光束平行风的大幅低估.
- 在降雨强度测量中发现了明显的偏差,超过了传统雨量表的偏差.
- 观察到对于激光束的风的有限偏差和对45°的风的不可忽视的高估值.
结论:
- 风大大影响了OTT Parsivel2的降雨量测量,特别是影响了降雨强度.
- 可以推导出纠正因子 (捕捞比率),以减轻风引起的错误.
- 优化仪器安装 (激光束垂直于主要风) 和使用风玻璃可以减少测量偏差.
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