Relationship between TTI and Various Thunderstorm Related Parameters over Kerala, India

IF 1.9 4区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

pure and applied geophysics Pub Date : 2024-11-28 DOI:10.1007/s00024-024-03617-7

N. Umakanth, Rupraj Biswasharma, Rajesh Gogineni, P. Vinay Kumar, D. M. Lal, Sachin M. Deshpande, M. C. Rao

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引用次数: 0

Abstract

This study mainly focuses on the relationship between Total Totals index (TTI) and other thunderstorm related parameters over Kerala region, India. This study has been carried out on thunderstorm days for the pre-monsoon season during the time period 2017–2022. The thunderstorm related parameters such as lightning, K Index (KI), Humidity Index (HI), Total precipitable water (TPW), Rainfall to Lightning Ratio (RLR), Maximum updraft speed (MUS), Lifted Index (LI), Convective available potential energy (CAPE), Dew point depression (DPD), Cloud fraction (CF) and Temperature Difference (TempDiff) have been considered for the analysis. For a better understanding between TTI and thunderstorm indices, two distinct regions D1 (10.8°-12.4° N, 75.2°-76.8° E) and D2 (9.2°-10.8° N, 76.2°-77.8° E) of Kerala state were selected as the study region. The results reveal that D2 region (135 days) showed more lightning activity than D1 region (88 days). A significant positive trend has been seen between TTI and KI parameters. RLR & TPW parameters showed a significant negative trend with TTI parameter. MUS exhibits positive trend whereas LI showed negative trends with TTI on lightning days over both regions. This study also shows that the CAPE and DPD showed an increasing trend with TTI during lightning days. We also utilized Random forest technique to study the relationship between various thunderstorm related parameters.

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印度喀拉拉邦上空TTI与雷暴相关参数的关系

本文主要研究了印度喀拉拉邦地区的Total Totals index （TTI）与其他雷暴相关参数的关系。这项研究是在2017-2022年雨季前的雷暴日进行的。雷电、K指数（KI）、湿度指数（HI）、总可降水量（TPW）、雨雷比（RLR）、最大上升气流速度（MUS）、抬升指数（LI）、对流有效势能（CAPE）、露点降（DPD）、云分数（CF）和温差（TempDiff）等雷暴相关参数进行了分析。为了更好地理解TTI和雷暴指数之间的关系，选择喀拉拉邦的两个不同区域D1（10.8°-12.4°N, 75.2°-76.8°E）和D2（9.2°-10.8°N, 76.2°-77.8°E）作为研究区域。结果表明：D2区（135 d）比D1区（88 d）闪电活动更频繁；TTI和KI参数之间存在显著的正趋势。RLR,TPW参数与TTI参数呈显著负相关。在两个地区的闪电日，MUS与TTI呈正趋势，而LI与TTI呈负趋势。在雷暴日期间，CAPE和DPD随TTI呈增加趋势。我们还利用随机森林技术研究了雷暴相关参数之间的关系。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

pure and applied geophysics 地学-地球化学与地球物理

CiteScore

4.20

自引率

5.00%

发文量

240

审稿时长

9.8 months

期刊介绍： pure and applied geophysics (pageoph), a continuation of the journal "Geofisica pura e applicata", publishes original scientific contributions in the fields of solid Earth, atmospheric and oceanic sciences. Regular and special issues feature thought-provoking reports on active areas of current research and state-of-the-art surveys. Long running journal, founded in 1939 as Geofisica pura e applicata Publishes peer-reviewed original scientific contributions and state-of-the-art surveys in solid earth and atmospheric sciences Features thought-provoking reports on active areas of current research and is a major source for publications on tsunami research Coverage extends to research topics in oceanic sciences See Instructions for Authors on the right hand side.