我有闪电数据，其中包含单个闪电及其位置、时间、极性、振幅和类型(云到地面、云内)。我正在尝试开发一些指标，以帮助我评估雷暴是否强烈。所谓强烈，我的意思是它有可能产生暴雨、大冰雹和强风。我计划使用雷达反射率作为我对风暴强度的最佳猜测，并在两个数据集之间建立一个统计模型。< / p >
By browsing through the litterature, it seems that a sharp increase in positive cloud-to-ground lightning frequency is a sign of storm intensification to come. I was wondering if there was anything else that I could work with. Is amplitude useful in any way? Is the ratio of IC to CG lightning relevant? Is there another metric I could develop?
Thanks!
IC与CG闪电的比例相关吗?
是。首先，强风暴往往很少有云对地(CG)的袭击。因此，IC:CG的比率可能会非常高。然而，一些强烈的风暴确实会产生大量的正向CG打击。他们仍将拥有较高的IC:CG比率，但他们将通过拥有更积极的CG打击而脱颖而出。然而，这两种类型——低cg和部分cg阳性——都可能很严重。2
值得注意的是，CG打击的数量可能取决于风暴在生命周期中的位置和风暴的物理位置(CG特征似乎与区域有关)。在龙卷风超级单体中，闪电总量在龙卷风形成过程中似乎减少了，而在超级单体的龙卷风阶段结束后，CG率似乎增加了。3
似乎没有任何现有的文献将振幅作为严重程度的衡量标准。也许，通过这项工作，你可以确定这是否是一个需要进一步研究的领域。< / p >
1 Donald R. MacGorman, Donald W. Burgess, Vladislav Mazur, W. David Rust, William L. Taylor, and Brenda C. Johnson, 1989: Lightning Rates Relative to Tornadic Storm Evolution on 22 May 1981. J. Atmos. Sci., 46, 221–251, doi: 10.1175/1520-0469(1989)046<0221:LRRTTS>2.0.CO;2.
2 Timothy J. Lang and Steven A. Rutledge, 2002: Relationships between Convective Storm Kinematics, Precipitation, and Lightning. Mon. Wea. Rev., 130, 2492–2506, doi: 10.1175/1520-0493(2002)130<2492:RBCSKP>2.0.CO;2.
3 Scott M. Steiger, Richard E. Orville, and Lawrence D. Carey, 2007: Total Lightning Signatures of Thunderstorm Intensity over North Texas. Part I: Supercells. Mon. Wea. Rev., 135, 3281–3302, doi: 10.1175/MWR3472.1.
Lawrence D. Carey, Steven A. Rutledge, and Walter A. Petersen, 2003: The Relationship between Severe Storm Reports and Cloud-to-Ground Lightning Polarity in the Contiguous United States from 1989 to 1998. Mon. Wea. Rev., 131, 1211–1228, doi: 10.1175/1520-0493(2003)131<1211:TRBSSR>2.0.CO;2.
Yeung, Linus HY, E. S. T. Lai, and S. K. S. Chiu. "Lightning Initiation and Intensity Nowcasting Based on Isothermal Radar Reflectivity-A Conceptual Model." The 33rd International Conference on Radar Meteorology. 2007.
C. Emersic, P. L. Heinselman, D. R. MacGorman, and E. C. Bruning, 2011: Lightning Activity in a Hail-Producing Storm Observed with Phased-Array Radar. Mon. Wea. Rev., 139, 1809–1825, doi: 10.1175/2010MWR3574.1.