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Characterization of Different Rainfall Types from Surface Observations Over a Tropical Location

机译：在热带地点的表面观测中表征不同的降雨类型

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摘要

This study characterizes different rainfall types using surface-based instruments (i.e. micro rain radar and laser precipitation monitor) installed at the Indian Institute of Technology Bhubaneswar Jatani, Odisha, India. A total of twelve rainfall cases including four from each season, i.e. pre-monsoon, monsoon and post-monsoon, are considered. The segregation of rainfall is carried out using radar reflectivity and rainfall intensity. In general, initial rainfall is dominantly convective and followed by a stratiform type. Two distinct maxima of radar reflectivity are noted at 3 and 5 km, suggesting the presence of high liquid water content and a melting band. The presence of liquid water content suggests occurrence of a warm rain process with shallow, intense convective cores. Results indicate a higher drop number density below 2 km with smaller size drops for convective rainfall and vice versa for the stratiform rainfall. Furthermore, Z-R relationships are computed for all the cases using a linear regression method, and the results suggest that the stratiform rainfall shows a higher slope parameter and lower intercept parameter as compared to convective rainfall. The distribution of drop number density shows a mono-modal and bimodal pattern for convective and stratiform rainfall, respectively.
机译：本研究表征了使用基于表面的仪器（即微雨雷达和激光降水监测器）在印度技术研究所Bhubaneswar Jatani，Itisha，Idisha，Idisha，Indisha，Indisha，Indisha，Indisha，IndiShies的不同降雨类型。共有十二个降雨案例，包括每个季节的四个，即季风前，季风和季风季度。利用雷达反射率和降雨强度进行降雨的分离。通常，初始降雨是占据对流的，然后是层状类型。在3和5km的3和5km的两个明显的雷达反射率最大值，表明存在高液体含水量和熔化带。液体含水量的存在表明，具有浅，强烈的对流核的温雨过程的发生。结果表明，在2公里的下降数密度低于2公里，对流降雨量较小，对层状降雨反之亦然。此外，使用线性回归方法计算Z-R关系，结果表明，与对流降雨相比，层状降雨显示出更高的斜率参数和更低的截距参数。滴数密度的分布分别显示了用于对流和层状降雨的单态和双峰模式。

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