欢迎访问《中国农学通报》，
中国农学通报

中国农学通报 ›› 2011, Vol. 27 ›› Issue (32): 294-298.

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

浙江省日照时数时空分布特征

吴昊旻 廖良清   

  • 收稿日期:2011-05-05 修回日期:2011-07-16 出版日期:2011-12-15 发布日期:2011-12-15

Spatial and Temporal Distribution of Sunshine Hours in Zhejiang Province

  • Received:2011-05-05 Revised:2011-07-16 Online:2011-12-15 Published:2011-12-15

PDF (PC)

941

摘要：

为了了解浙江省日照的时空分布特征，更好地为农业生产服务，笔者根据1971—2009年浙江省65个台站逐月日照资料，利用Morlet连续小波变化、功率谱检验及Mann-Kendall检验，研究了浙江省日照时数的时间变化趋势、周期演变规律和突变转折点；并通过等值线分布和EOF分解等方法，分析了浙江省近39年的日照时数的空间分布特征。结果表明：浙江省日照时数存在不同尺度的周期分量，6~9年的周期振荡较强烈，其中8.7年周期通过了功率谱95%的置信度检验；Mann-Kendall检验表明浙江省日照在全时域表现为一致的减少趋势，并且在70年代中后期存在突变；浙江省日照时数空间分布上呈现自东北向西南减少的趋势，EOF分析得出全省日照距平表现为整体一致的减少趋势。

关键词: 太行山山前平原, 太行山山前平原, 半旱地农业, 节水农业, 可行性

Abstract:

In order to understand the temporal and spatial distribution of sunshine and better services for agricultural production, based on 65 stations’ monthly sunshine data from 1971 to 2009 in Zhejiang Province, the Morlet wavelet analysis, power spectrum test and Mann-Kendall test were first used to analyze time-frequency characteristics, periodicity and abrupt change of the sunshine hours; and then contours and EOF were used to analyze the temporal change and spatial distribution of the sunshine hours for Zhejiang Province over the past 39 years. The results showed that: nearly 39 years, the sunshine periodic components had different scales, the strong periodic oscillations concentrated in 6 to 9 years, in which 8.7 years cycle of the power spectrum passed 95% confidence test. Mann-Kendall test showed sunshine hours displayed a consistent decreasing trend, and there was a mutation in the end of 1970s. The spatial distribution of sunshine hours showed a decreasing trend from northeast to southwest, the sunshine anomaly displayed a decreasing trend for the whole province by EOF analysis.