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Development of novel hybrid machine learning models for monthly thunderstorm frequency prediction over Bangladesh

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Abstract

Thunderstorm frequency (TSF) prediction with higher accuracy is of great significance under climate extremes for reducing potential damages. However, TSF prediction has received little attention because a thunderstorm event is a combination of intricate and unique weather scenarios with high instability, making it difficult to predict. To close this gap, we proposed two novel hybrid machine learning models through hybridization of data pre-processing ensemble empirical mode decomposition (EEMD) with two state-of-arts models, namely artificial neural network (ANN), support vector machine for TSF prediction at three categories over Bangladesh. We have demarcated the yearly TSF datasets into three categories for the period 1981–2016 recorded at 28 sites; high (March–June), moderate (July–October), and low (November–February) TSF months. The performance of the proposed EEMD-ANN and EEMD-SVM hybrid models was compared with classical ANN, SVM, and autoregressive integrated moving average. EEMD-ANN and EEMD-SVM hybrid models showed 8.02–22.48% higher performance precision in terms of root mean square error compared to other models at high-, moderate-, and low-frequency categories. Eleven out of 21 input parameters were selected based on the random forest variable importance analysis. The sensitivity analysis results showed that each input parameter was positively contributed to building the best model of each category, and thunderstorm days are the most contributing parameters influencing TSF prediction. The proposed hybrid models outperformed the conventional models where EEMD-ANN is the most skillful for high TSF prediction, and EEMD-SVM is for moderate and low TSF prediction. The findings indicate the potential of hybridization of EEMD with the conventional models for improving prediction precision. The hybrid models developed in this work can be adopted for TSF prediction in Bangladesh as well as different parts of the world.

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Acknowledgements

We are grateful to the Department of Disaster Management, Begum Rokeya University, Rangpur, for all sorts of assistance provided during this study. Furthermore, we would like to thank the Bangladesh Meteorological Department (BMD) for providing the required data for this research.

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MAKA designed, conceptualized, drafted the original manuscript; ARMTI and MAKA planned the documents; MAKA and MSR were involved in statistical analysis; ARMTI and MAKA interpret the analysis; KA contributed to instrumental setup, data analysis, validation; MAKA, MSR, and KA contributed to data collection and extraction; MAKA and ARMTI edited the manuscript, literature review, discussion and also involved in software, mapping, and proofreading during the manuscript drafting stage.

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Correspondence to Md. Abul Kalam Azad or Abu Reza Md. Towfiqul Islam.

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The authors declared that they have no conflict of interest.

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Azad, M.A.K., Islam, A.R.M.T., Rahman, M.S. et al. Development of novel hybrid machine learning models for monthly thunderstorm frequency prediction over Bangladesh. Nat Hazards 108, 1109–1135 (2021). https://doi.org/10.1007/s11069-021-04722-9

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  • DOI: https://doi.org/10.1007/s11069-021-04722-9

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