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摘要:
In the issue of rainfall estimation by radar through the necessary relationship between radar reflectivity Z and rain rate R (Z-R), the main limitation is attributed to the variability of this relationship. Indeed, several pre-vious studies have shown the great variability of this relationship in space and time, from a rainfall event to another and even within a single rainfall event. Recent studies have shown that the variability of raindrop size distributions and thereby Z-R relationships is therefore, more the result of complex dynamic, thermody-namic and microphysical processes within rainfall systems than a convective/stratiform classification of the ground rainfall signature. The raindrop number and size at ground being the resultant of various processes mentioned above, a suitable approach would be to analyze their variability in relation to that of Z-R relation-ship. In this study, we investigated the total raindrop concentration number NT and the median volume di-ameter D0 used in numerous studies, and have shown that the combination of these two ‘observed’ parame-ters appears to be an interesting approach to better understand the variability of the Z-R relationships in the rainfall events, without assuming a certain analytical raindrop size distribution model (exponential, gamma, or log-normal). The present study is based on the analysis of disdrometer data collected at different seasons and places in Africa, and aims to show the degree of the raindrop size and number implication in regard to the Z-R relationships variability.
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篇名 Understanding the Variability of Z-R Relationships Caused by Natural Variations in Raindrop Size Distributions (DSD): Implication of Drop Size and Number
来源期刊 大气和气候科学(英文) 学科 地球科学
关键词 RAINDROP Size Distribution Radar Reflectivity Factor RAIN Rate Median VOLUME Diameter Total NUMBER of Drops Per Unit VOLUME Z-R Relationship Convective RAIN STRATIFORM RAIN Squall Lines THUNDERSTORM
年,卷(期) 2011,(3) 所属期刊栏目
研究方向 页码范围 147-164
页数 18页 分类号 P4
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节点文献
RAINDROP
Size
Distribution
Radar
Reflectivity
Factor
RAIN
Rate
Median
VOLUME
Diameter
Total
NUMBER
of
Drops
Per
Unit
VOLUME
Z-R
Relationship
Convective
RAIN
STRATIFORM
RAIN
Squall
Lines
THUNDERSTORM
研究起点
研究来源
研究分支
研究去脉
引文网络交叉学科
相关学者/机构
期刊影响力
大气和气候科学(英文)
季刊
2160-0414
武汉市江夏区汤逊湖北路38号光谷总部空间
出版文献量(篇)
426
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0
总被引数(次)
0
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