Temperature is one of the factors of climate variables and understanding its nature is very important because the effect of temperature on climate change is higher than that of other variables. The purpose of the present study was to build an appropriate model to forecast the monthly maximum temperature of Rajshahi district in Bangladesh. The Box–Jenkins modeling strategy was performed using EViews software. This strategy was performed using the Augmented Dickey–Fuller, Phillip–Perron, Kwiatkowski–Phillips–Schmidt–Shin, autocorrelation function, partial autocorrelation function, ordinary least square method, normal P–P plot, Chow’s breakdown test, Chow’s forecast test, and standardized residuals plot. Seasonal variation, cyclical variation, and a slightly upward trend over time were found in the temperature. The temperature was found to be stationary at level after removing the cyclical variation using the resistant smoothing method, 4253H-twice. The SARMA(2, 1)(1, 2)12 model was found to be the most appropriate model for forecasting. The fitted model is also stable with no structural change and thus applicable for forecasting and policy purposes. Finally, this model was used for forecasting maximum temperature from January 2010 to December 2015. The forecasted value divulged that the maximum temperature will be increased by 3 °C during 2010–2015. This is an alarming situation for the environment and should take initiative to control and save our environment of Rajshahi district in Bangladesh.
Keywords
- Box–Jenkins modeling strategy
- Correlogram
- Normal P–P plot
- Stability test
- Unit root test