宁苏扬地区500多年来的旱涝趋势及近期演变特征  

THE TENDENCY OF DROUGHT/FLOOD FOR 500 YEARS AND MORE AND THE VARIANCE FEATURES OF LATE YEARS IN NING-SU-YANG AREA

作　　者：施宁[1] 

机构地区：[1]江苏省气象科学研究所,南京210008

出　　处：《气象科学》1998年第1期28-34,共7页Journal of the Meteorological Sciences

摘　　要：本文采用小波分析等多种统计技术研究了宁苏扬地区1470—1995年间旱涝变化的趋势。500多年可划分为差异显著的6个旱涝气候阶段，进一步还揭示出了在各个旱涝阶段内低频振荡的周期和振幅的不同的特征以及最近一个阶段的旱涝演变特征。By using wavelet analysis and other statistical techniques, the drought/flood variance tendency in Ning-Su-Yang area during 1470- 1995 has been researched. For 500 years and more, the six drought/flood stages which have significant difference have been divided. The difference feature of period and amplitude of low frequence oscillation in each stage and the variance feature in late stage have also been discussed.

关 键 词：旱涝等级 突变和渐变 小波分析 近期演变特征 

分 类 号：P426.616[天文地球—大气科学及气象学]