Non-Parametric Trend Analysis and Autoregressive Neural Network Modeling of Clustered Climate Time Series

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Detalhes
  • Tipo de apresentação: Oral Presentation and Poster (LACSC)
  • Eixo temático:
  • Palavras chaves: Clustering; Trend; Climate prediction; ANN; Holt-Winters;
  • 1 Universidade Estadual de Campinas

Non-Parametric Trend Analysis and Autoregressive Neural Network Modeling of Clustered Climate Time Series

Olawale Awe

Universidade Estadual de Campinas

Resumo

Climate change is unarguably one of the biggest problems facing the 21st century. However, most recent research works on climate forecasting are based on traditional time series models which are unable to detect and forecast latent patterns inherent in climatic variables across global regions. In this study, we investigate the performance of autoregressive neural network algorithms using monthly temperature data of 30 years (1991- 2020) obtained from the World Bank Climate Knowledge Portal. Clustered image generated by hierarchical clustering algorithm revealed the most similar climatic patterns among 32 countries in the Americas. Mann Kendall trend analysis revealed the presence of seasonal trend in the temperatures of all the countries considered except in Costa Rica and Bolivia. Autoregressive Neural Networks (ANN) is then used to predict clustered monthly surface air temperature and it was shown to outperform the traditional time series models of SARIMA and Holt-Winters. Prediction accuracy of ANN differ among various regional temperature clusters. Results from this study are useful for policy makers as well as climate modelers in selecting the best models for forecasting climate data.

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