Abstract
We modified the one-dimensional conservation element and solution element (CESE) hydrodynamic (HD) model into a new version [1D CESE-HD-2], by considering the direction of the shock propagation. The real-time performance of the 1D CESE-HD-2 model during Solar Cycle 23 (February 1997 – December 2006) is investigated and compared with those of the Shock Time of Arrival Model (STOA), the Interplanetary-Shock-Propagation Model (ISPM), and the Hakamada–Akasofu–Fry version 2 (HAFv.2). Of the total of 584 flare events, 173 occurred during the rising phase, 166 events during the maximum phase, and 245 events during the declining phase. The statistical results show that the success rates of the predictions by the 1D CESE-HD-2 model for the rising, maximum, declining, and composite periods are 64 %, 62 %, 57 %, and 61 %, respectively, with a hit window of ± 24 hours. The results demonstrate that the 1D CESE-HD-2 model shows the highest success rates when the background solar-wind speed is relatively fast. Thus, when the background solar-wind speed at the time of shock initiation is enhanced, the forecasts will provide potential values to the customers. A high value (27.08) of χ 2 and low p-value (< 0.0001) for the 1D CESE-HD-2 model give considerable confidence for real-time forecasts by using this new model. Furthermore, the effects of various shock characteristics (initial speed, shock duration, background solar wind, longitude, etc.) and background solar wind on the forecast are also investigated statistically.
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Zhang, Y., Du, A.M., Du, D., Sun, W. (2014). Evaluation of a Revised Interplanetary Shock Prediction Model: 1D CESE-HD-2 Solar-Wind Model. In: Tomczyk, S., Zhang, J., Bastian, T. (eds) Coronal Magnetometry. Springer, New York, NY. https://doi.org/10.1007/978-1-4939-2038-9_31
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