【摘要】 利用方差极大旋转经验正交函数展开、最大熵谱、小波分析方法 ,对京津冀区域近 5 0年春夏季降水的地域特征与气候变化进行研究。结果表明此区域的降水场分别存在以下主要降水异常分布型 :夏季包括燕山迎风坡型、太行山迎风坡型、冀中平原型、冀东平原型、沿海平原型、冀北山地型、冀南平原型 ;春季包括平原中南部型、燕山南麓型、滨海平原型、京西山麓型、太行山迎风坡型、冀东北高原型、冀西北高原型 (坝上 )。同时 ,通过最大熵谱、小波分析 ,进一步分析各降水型的主要变化特征及主要周期。更多还原

【Abstract】 Using rotating empirical orthogonal function(EOF), maximum entropy spectrum and wavelet analysis, the regional feature and climatic variation of precipitation in Beijing, Tianjin and Hebei in Spring and Summer were analyzed diagnostically. The results show that the main precipitation anomaly patterns are as follow in spring and summer respectively: Yanshan mountains windward side pattern, Taihang mountains windward side pattern, middle of Hebei plain pattern, east of Hebei plain pattern, coastal plain pattern, north of Hebei mountain pattern, south of Hebei plain pattern in summer, and middle and east plain pattern, south of Yashan mountain pattern, coastal plain pattern, west to Beijing pattern, Taihang mountains windward side pattern, northeast of Hebei plateau pattern, northweast of Hebei plateau pattern in spring. In the mean time, the main variation feature and period of each of the precipitation patterns were analyzed by means of maximum entropy spectrum and wavelet analysis.更多还原