摘要
通过对鲁西南日平均气温稳定通过１２℃初日与前期北半球５００ｈＰａ高度场的相关分析，得出一批优势相关区。从相关区中选取因子，利用主成分分析进行组合和浓缩，建立了鲁西南１２℃初日预报方程，应用效果理想。
Based on correlation analysis of the date,after which the mean daily temperature is increasing steadily to above 12℃ in the Southwest of Shandong Province,with the dataset of northern 500hPa monthly mean height,it is found that there are some areas over which the height has close correlation with the date.By selected factors from those areas and usage of principal component analysis to compose the factors,the forecast equation was obtained.The equation was proved useful.
出处
《气象》
CSCD
北大核心
1997年第1期50-52,共3页
Meteorological Monthly
关键词
棉花
适播期
日平均气温
气温
温度预报
favourable seed time of cotton forecast equation principal component analysis
