| 降水粒子的最大直径对速度三阶中心矩法的影响 |
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| 引用本文： | 蒋义芳,汤达章.降水粒子的最大直径对速度三阶中心矩法的影响[J].气象科学,2001,21(1):80-86. |
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| 作者姓名： | 蒋义芳 汤达章 |
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| 作者单位： | 1. 江苏省气象台,
2. 南京气象学院大气科学系, |
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| 摘 要： | 本文大用多普勒雷达垂直探测的速度估测大气垂直速度的方法－速度三阶中心短法（简称M3法）的基础上，利用雨滴谱资料，分析了降水粒子的最大直径Dmax对M3法的影响，并从实际工作出发，用反射率因子和多普勒谱宽拟合了Dmax和雨强（I),提高了大气垂直速度的估计精度。
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| 关 键 词： | 垂直速度 雨滴谱 速度三阶中心矩法 多普勒雷达 降水粒子 大气运动 |
| 修稿时间： | 1999年5月13日 |
THE INFLUENCES OF MAXIMUM DIAMETER OF RAINFALL PARTICLES ON THE CENTRAL MOMENT METHOD OF THE THIRD POWER OF VELOCITY |
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| Jiang Yifang.THE INFLUENCES OF MAXIMUM DIAMETER OF RAINFALL PARTICLES ON THE CENTRAL MOMENT METHOD OF THE THIRD POWER OF VELOCITY[J].Scientia Meteorologica Sinica,2001,21(1):80-86. |
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| Authors: | Jiang Yifang |
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| Abstract: | The method of using the velocity fields obtained by the Doppler radar detect- ing the atmosphere vertically to measure the vertical velocity of atmosphere is called the cen- tral moment method of the third power of velocity (which is called M3 method). On the basis of this, the article utilizes the raindrop spectrum information to analyse the influences of maximum diameter of rainfall particles (which is called Dmax)on M3 method. Considering the actual work,we have estimated the Dmax and rainfall intensity(I)with reflectivity factor and Doppler spectrum's width. So the estimated precision on the vertical velocity of atmo- sphere will be improved. |
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| Keywords: | Vertical velocity Raindrop spectrum Central moment method of the third power of velocity |
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