摘要
利用重庆市极端最高气温及高温日数资料 ,采用 MHF(墨西哥帽函数 )小波等方法分析重庆市近 5 0 a来高温的时间——频率的多层次时间尺度变化特征。结果表明 ,重庆市高温变化具有明显的阶段性 ;重庆市极端最高气温变化以 6a周期振动最强 ,而高温日数变化则以 14～ 15
In this article the variations of maximum temperature and high-temperature days during the past 50 years in Chongqing were analyzed by use of MHF wavlet analysis.Some multi-scale and jump features of variations were discovered .Results show that the variations of maximum temperature and high-temperature days in Chongqing contain obviously staggered features.Six-year period-oscillation of maximum temperature variations is the strongest and fourteen-year period-oscillation of high-temperature days variations is the strongest,respectively.
出处
《气象科学》
CSCD
北大核心
2003年第3期325-331,共7页
Journal of the Meteorological Sciences
基金
重庆市科技攻关项目"重庆市气候异常基本规律及形成原因研究"资助
关键词
MHF小波
多时间尺度
高温
变化特征
MHF wavelet Multi time scale High temperature Variation features
