遵义市近56a来夏季气温及降水变化的特征分析

选取1954-2009年历年逐月平均气温及累积降水资料，采用墨西哥帽函数（MHF），对遵义市近56a来夏季气温及降水的时间序列进行分析，揭示了遵义市气温及降水变化在多时间尺度上的复杂结构，找出了不同时间尺度下夏季气温和降水序列变化的周期和突变点。结果表明：遵义市夏季气温及降水存在多时间尺度特征，在年代际变化上存在显著性周期，大尺度周期变化嵌套着小尺度的周期变化，其中主周期约为21a。遵义气温与降水变化有比较好的对应关系，即偏暖期对应降水的偏少期，而偏冷期则对应降水的偏多期。

Analysis about Characteristics of the Summer Temperature and Precipitation Variations of in recent 56 years in Zunyi

Based on the monthly mean temperature and cumulative precipitation data during 1954-2009,this paper uses Mexican hat function(MHF) for analysising the temperature and precipitation dataset during summer in recent 56 years,then revealing the complex structure,period and mutation of the summer temperature and precipitation on multi-time scales.The results show that: the summer temperature and precipitation have the multi-time periods,especially the significant interdecadal period,of which the leading period is 21 years.There is a relatively good correspondence between the summer temperature and precipitation.In other words,the warmer period is in the corresponding of the less rainfall period and the cooler period is in the corresponding of the more rainfall period.