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Precipitation processes as deduced by combining Doppler radar and disdrometer.

机译:通过结合多普勒雷达和测速仪推算出的降水过程。

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摘要

Precipitation processes are investigated in stratiform and convective weather systems by combining Doppler radar and disdrometer measurements. Vertical scans are designed to measure the standard radar data fields and the power spectrum of the vertical Doppler velocities with high spatial and temporal resolution. A new method, based on iterative application of a disdrometer-determined Z-R relation, is developed to estimate vertical winds from the vertical scan data. Using this method, radar-based raindrop size spectra calculated near the surface in light stratiform rain compare well with simultaneous measurements from a collocated disdrometer. A full raindrop size spectrum profile is deduced for a specific steady state case. It is found that the spectrum does not vary with height, suggesting that the spectral shape is mainly controlled by the ice particles occurring above the 0
机译:通过结合多普勒雷达和测风仪的测量,研究了层状和对流天气系统中的降水过程。垂直扫描旨在以高时空分辨率测量标准雷达数据场和垂直多普勒速度的功率谱。开发了一种新方法,该方法基于由测速仪确定的Z-R关系的迭代应用,可以根据垂直扫描数据估算垂直风。使用这种方法,在层状轻雨中在地面附近计算出的基于雷达的雨滴尺寸谱与并置的测距仪同时进行的测量结果可以很好地比较。对于特定的稳态情况,得出了完整的雨滴尺寸谱图。发现光谱不会随高度变化,这表明光谱形状主要受0之上的冰粒控制。

著录项

  • 作者

    Thomson, Alan Douglas.;

  • 作者单位

    University of Toronto (Canada).;

  • 授予单位 University of Toronto (Canada).;
  • 学科 Physics Atmospheric Science.
  • 学位 Ph.D.
  • 年度 1997
  • 页码 115 p.
  • 总页数 115
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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