关于大气“记忆”的大气环流模式模拟研究

通过２种大气环流模式（ＧＣＭ）的数值模拟，研究了大气对于赤道东太平洋海温（ＳＳＴ）异常外强迫的“记忆”问题。结果表明，大气对外强迫的“记忆”比传统意义的“记忆”要长得多，这是因为外强迫通过影响大气内部动力过程而激发产生了低频振荡（即大气低频遥响应），使得外强迫的影响可持续相当长的时间，大气对外强迫的“记忆”也就变得相当长。

AGCM Numerical Simulation on Atmospheric Memory

Based on numerical simulatin, two AGCMs are employed to study atmospheric memory for sea surface temperature anomalies over eastern equatorial Pacific The results show that atmospheric memory for external forcing is longer than expected The mechanism is that, low-frequency oscillation (atmospheric low-frequency remote response) excited by the external forcing through atmospheric internal dynamic process prolongs the effect of external forcing, therefore, the atmospheric memory becomes longer