为了减弱厄尔尼诺现象对极移预报的影响,分别利用不同拟合序列长度进行极移预报,研究表明:适当延长拟合序列长度至17-19年,可以更好地反映极移趋势,提高厄尔尼诺现象发生期间的极移预报精度。
In order to reduce the influence of EI Nio event on polar motion prediction, the length selection of polar motion fitting series are studied for polar motion prediction. The results show that the accuracy of polar motion prediction can be improved in the time of EI Nio by extending the length of polar motion fitting series to 17-19 years.