热带气象学报2013，Vol.29Issue(3)：511-516,6.DOI:10.3969/j.issn.1004-4965.2013.03.019
淮河流域汛期典型旱涝年的低频环流特征分析
ANALYSIS ON LOW-FREQUENCY CIRCULATION CHARACTERISTICS OF TYPICAL DROUGHT AND FLOOD YEARS FOR HUAIHE RIVER VALLEY FLOODS
摘要
Abstract
Using Morlet wavelet analysis and Butterworth filter,low-frequency characteristics of Huaihe River valley's typical drought and flood years are analyzed.Results show that there are great differences between drought and flood years.As shown from the contribution of periodicity and variance,the greatest difference is found in the 30～60 period.From low-frequency circulation characteristics corresponding to peak phases of 30～60 d filter rainfall,main difference in high levels lies in East Asia.In flood years,high-to-low latitude configuration is "-+-+"; in drought years,the phase of wave train is approximately the opposite.In the low-level wind field,a low-frequency anticyclone is more significant in the subtropics.Besides,there are also great differences in propagation characteristics:in flood years,opposite propagation exists in high and low latitudes,which is not clear in drought years; in flood years,westward low-frequency propagation is significant from west Pacific to East Asia,but only limited in areas east of 120 °E in drought years.关键词
典型旱涝/低频振荡/环流特征/淮河流域Key words
typical drought and flood/ low-frequency oscillation/ circulation characteristics/Huaihe River valley分类
天文与地球科学引用本文复制引用
程智,徐敏,罗连升,丁小俊..淮河流域汛期典型旱涝年的低频环流特征分析[J].热带气象学报,2013,29(3):511-516,6.基金项目
水利部2009年公益项目(00901024) （00901024）
安徽省气象局2010年业务能力建设项目(ybyc2010007)共同资助 （ybyc2010007）
