摘要
利用E0F和RE0F方法分解出浙江梅汛期降水的4种主要分布型,其空间分布年代际差异显著,浙西北分布年代际特征明显,而浙西南、浙东北、浙东南分布分别在80年代、90年代和21世纪以后出现变化增强趋势。80年代以后,浙江降水分布趋于同相变化,区域间(浙东北型和浙东南型)降水变化震荡加剧。小波分析揭示了浙江梅汛期降水分布的年际和年代际变化周期。环流特征分析显示,浙江梅汛期降水分布与西太平洋副高强度位置及冷空气影响有关。
Using EOF and REOF method,4 main kinds of Meiyu distribution in Zhejiang are analyzed and their spatial characteristic is remarkable on interdecadal scales. The interdecadal characteristic of Meiyu distribution centers in northwest Zhejiang is obvious,while the change of Meiyu distributions center in southwest,northeast and southeast Zhejiang are increasing in the 80s,the 90s and the 21st century separately. After the 80s,the Meiyu distribution in Zhejiang tends to change in the same phase and the precipitation change between regions in northeast and southeast of Zhejiang is strengthening. The interannual and interdecadal periods of Meiyu distributions in Zhejiang are revealed by Wavelet analysis. It is showed by circulation analysis that Zhejiang Meiyu precipitation distributions are related to both intensity and location of West Pacific Subtropical High and the effect of cold air.
出处
《科技通报》
北大核心
2009年第5期562-569,共8页
Bulletin of Science and Technology
基金
浙江省科技厅重大科技专项社会发展项目(2007C13G1610002)
关键词
浙江梅汛期降水分布
时空特征
环流特征
Meiyu precipitation distributions in Zhejiang
spatial-temporal characteristic
circulation features
