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Forecasting daily maximum surface ozone concentrations in Brunei Darussalam--an ARIMA modeling approach
Krishan Kumar1, A K Yadav, M P Singh
1Department of Environmental Science and Engineering, Guru Jambheshwar University, Hisar, Haryana, India. krishan_khatri@yahoo.co.in
Abstract:
A time series approach using autoregressive integrated moving average (ARIMA) modeling has been used in this study to obtain maximum daily surface ozone (O3) concentration forecasts. The order of the fitted ARIMA model is found to be (1,0,1) for the surface O3 data collected at the airport in Brunei Darussalam during the period July 1998-March 1999. The model forecasts of one-day-ahead maximum O3 concentrations have been found to be reasonably close to the observed concentrations. The model performance has been evaluated on the basis of certain commonly used statistical measures. The overall model performance is found to be quite satisfactory as indicated by the values of Fractional Bias, Normalized Mean Square Error, and Mean Absolute Percentage Error as 0.025, 0.02, and 13.14% respectively.