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本文通过对程海沉积物粒度垂直剖面的精细剖析，发现沉积物颗粒表现出明显的“细－粗－细”准周期变化，灵敏地记录了区域气候“湿－干－湿”的周期性演替，可作为气候变化的良好代用指标。程海区域气候存在５０和４００ａ两种时间尺度的干湿准周期波动，目前正处于干旱期末期－湿润期初期，水位将有所回升。沉积物粒度统计分析还表明：沉积物标准差在剖面上与平均粒径及粗颗粒含量呈同步正相关变化，因而它也具有与沉积物平均粒径相同的环境指示意义
Through the detailed analysis of the sediment grain size vertical profile in Chenghai Sea, it is found that the sediment particles show a significant “fine-coarse-fine” quasi-periodic change and sensitively record the cyclical performance of regional climate “wet-dry-wet” As a good proxy for climate change. Chenghai regional climate there are 50 and 400a wet and dry and quasi-cyclical fluctuations of two time scales, is now in the end of the dry period - wet period, the water level will rise. Statistical analysis of sediment grain size also shows that the standard deviation of sediments shows a synchronous and positive correlation with the average grain size and the coarse grain content in the section, and thus it also has the same environmental significance as the average grain size of the sediment