The Influence of Drop Size Distributions on the Relationship between Liquid Water Content and Radar Reflectivity in Radiation Fogs
The Influence of Drop Size Distributions on the Relationship between Liquid Water Content and Radar Reflectivity in Radiation Fogs
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DOI：
10.3390/atmos8080142
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发表时间：
2017-08-01
期刊：
影响因子：
2.9
通讯作者：
Bendix, Joerg
中科院分区：
文献类型：
--
作者：
Thies, Boris;Egli, Sebastian;Bendix, Joerg
本文研究了雾中液滴粒径分布（DSD）的时间动态及其对液态水含量（LWC）与雷达反射率（Z）关系的影响。在德国林登-莱赫格尔的马尔堡地面实况和剖面观测站的三次辐射雾事件期间测量的数据构成了本分析的基础。具体来说，我们调查了以下问题：（1）不同的雾生命周期阶段表现出显着不同的DSD？(2)是否有可能为每个生命周期阶段确定特征数据集定义？(3)是否有可能通过特征DSD推导出可靠的Z-LWC关系？结果表明，尽管每一次雾事件都有其独特的特征，但雾的生命周期存在阶段性差异，不能对不同阶段的DSD做出一般性的结论。每个阶段内的较大程度的变化也排除了建立代表性的平均谱。
This study investigates the temporal dynamics of the drop size distribution (DSD) and its influence on the relationship between the liquid water content (LWC) and the radar reflectivity (Z) in fogs. Data measured during three radiation fog events at the Marburg Ground Truth and Profiling Station in Linden-Leihgestern, Germany, form the basis of this analysis. Specifically, we investigated the following questions: (1) Do the different fog life cycle stages exhibit significantly different DSDs? (2) Is it possible to identify characteristic DSDs for each life cycle stage? (3) Is it possible to derive reliable Z-LWC relationships by means of a characteristic DSD? The results showed that there were stage-dependent differences in the fog life cycles, although each fog event was marked by unique characteristics, and a general conclusion about the DSD during the different stages could not be made. A large degree of variation within each stage also precludes the establishment of a representative average spectrum.