次级波动
次级波动-
总的气候特征为冷期偏湿暖期偏干，在冷湿和暖干的宏观波动背景上存在次级波动，反映出其气候变化的区域特性。
The general paleoclimatic conditions of the lake area are characterized by the alteration of cold-wet periods with warm-dry periods , with secondary fluctuations superimposed on the macroscopic trend , representing the regional paleoclimatic features .