粗糙冰雹后向散射系数库在 2.8GHz 处。

Library of rough hailstone backscattering coefficients at 2.8 GHz.

机构信息

Cooperative Institute for Severe and High-Impact Weather Research and Operations (CIWRO), Norman, OK, USA.

National Severe Storms Laboratory/NOAA (OAR), Norman, OK, USA.

出版信息

Sci Data. 2023 Jul 13;10(1):456. doi: 10.1038/s41597-023-02352-3.

DOI:10.1038/s41597-023-02352-3

PMID:37443294

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10345147/

Abstract

The rough hailstone scattering library is created to fill the need for results of non-spheroidal hailstone backscattering characteristics. The listed backscattering coefficients at the S-band (2.8 GHZ) are specifically tailored for computing the polarimetric variables. The National Weather Service's radar operates in this band; hence the library is pertinent to those studying hail in the USA. The library contains several axis ratios and a range of hail sizes from 5 mm to 100 mm. Moreover, hailstone surface roughness is expressed as a percentage of the equatorial diameter. Our computational electromagnetic approach to modeling hailstones is compared with typically employed simpler methods. The polarimetric variables calculated using our models can be compared to observations. Furthermore, we illustrate the potency of the CEM approach to hydrometeors with extreme axis ratios for which simpler methods (i.e., the T-matrix) fail.

摘要

糙面冰雹散射库的创建是为了满足非球形冰雹后向散射特性结果的需求。列出的 S 波段（2.8GHz）的反向散射系数是专门为计算偏振变量而定制的。美国国家气象局的雷达在这个波段运行; 因此，该库与那些在美国研究冰雹的人有关。该库包含几个纵横比和从 5 毫米到 100 毫米的一系列冰雹尺寸。此外，冰雹表面粗糙度表示为赤道直径的百分比。我们的模拟冰雹的计算电磁方法与通常使用的更简单的方法进行了比较。使用我们的模型计算的偏振变量可以与观测结果进行比较。此外，我们还说明了 CEM 方法对具有极端纵横比的水凝物的强大作用，对于这些水凝物，更简单的方法（即 T 矩阵）失败。