摘要
利用娄底市常规气象观测资料和娄底市油菜产量统计资料,对1981～2010年娄底市油菜不同生育期的气温、降水量和日照时数进行主分量分析定义出气候综合指标,再通过Morlet小波变换对气候综合指标和油菜产量进行多时间尺度特征分析。结果表明:娄底市油菜不同生育期气候综合指标均由前两个主分量贡献产生,并存在明显的多时间尺度特征;娄底市油菜全生育期气候综合指标和油菜产量各自所反映的多时间尺度特征具有相似性。
Using the routine meteorological data and the statistical data of yield of rape in Loudi City from 1981 to 2010, climate composite index was defined by principal component analysis of temperature, precipitation and sunshine hours in different growth stages of rape, and then multiple time scale characteristics of climate composite index and yields of rape were analyzed by using Morlet wavelet transformation. The results showed that climate composite index in different growth stages of rape in Loudi city were all produced by the contribution of the first two principal components, and there was obvious characteristics of muhiple time scale; the multiple time scale characteristics reflected respectively by climate composite index and yields of rape in the whole growth stages in Loudi city had the comparability.
出处
《湖南农业科学》
2012年第8期86-88,91,共4页
Hunan Agricultural Sciences
基金
湖南省气象局资助项目(201217)
关键词
气候资源
主分量分析
Morlet小波变换
油菜产量
climate resources
principal component analysis
Morlet wavelet transformation
yields of rape
