桑巴站(8.5°N, 76.9°E)层状和过渡性降水过程中DSD参数的季节变化

N. Kiran Kumar, S. Lavanya
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引用次数: 0

摘要

利用地面分差仪和微雨雷达的观测资料,利用伽玛函数推导了沿海站Thumba上空的雨滴大小分布参数。采用层状雨和过渡雨模式研究了2006- 2008年不同季风季节DSD参数的垂直变化。分析清楚地揭示了不同季节DSD参数的显著变化。采用等高线频率高程图(CFAD)分析了两种降雨条件下DSD的显著微物理特征。结果表明,观测到的伽马参数和中位体积直径的变化归因于蒸发、破碎和碰撞-聚并等微物理过程。本研究结果的意义证明了Ka波段雷达在理解小雨到中雨期间降雨的微物理特性方面的能力
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Seasonal variation of DSD parameters during stratiform and transitional precipitation over a coastal station Thumba (8.5°N, 76.9°E)
Using the observations of both ground based disdrometer and Micro Rain Radar, Drop size distribution (DSD) parameters were derived using gamma function over coastal station Thumba. Stratiform rain and transition rain regime has been considered to study the vertical variability of DSD parameters for different monsoon seasons during 2006- 2008. The analysis clearly reveals a significant variation in DSD parameters for different seasons. Contour Frequency by Altitude Diagram (CFAD) of DSD parameters is carried out to examine salient microphysical characteristics of DSD during these two rain regimes. Results show that the observed variability of gamma parameters and median volume diameter is attributed to microphysical processes like evaporation, break-up and collision-coalescence. The significance of the present results demonstrates the capability of Ka band radar in understanding the microphysics of rain during light to moderate rain regimes
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