摘要
利用Morlet复小波对广州市1952—2007年平均气温和降水量数据进行小波变换并计算其小波能量谱,从而探索近期人类活动影响下气温、降水的年际变化规律及其同步性。结果表明,近年来广州市年平均气温变化规律减弱,变化过程不明显。而年降水量的变化则从1995年开始,呈现明显的"干湿"变化,变化间隔短,震荡性增强。从大尺度(15～25年)来看,广州市年际气候变化过程中存在一定的水热同步规律。但是由于近年受全球变暖和人类活动的影响,从小尺度(3～8年)来看,广州市年际气候变化过程中具有水热不同步的特点。
The Morlet complex wavelet is used to perform the wavelet transform for the annual average temperature and rainfall data from 1952-2007 in Guangzhou,and calculate the wavelet energy spectrum,so as to explore the annual change rule and its synchronization of temperature and rainfall influenced by recent human activity.The results show that the change rule of Guangzhou annual average temperature is weaken,and the changing process is unobvious;the annual rainfall appears in dry.wet change,and has short change interval and strong concussion performance,which stars from 1995.The annual climate change process of Guangdong has a certain hydrothermal synchronous rule,which occurs in the large.scale years(15~25 y).The annual climate change process of Guangdong has the characteristic of hydrothermal asynchronism due to the effects of global warming and human activities,which occurs in small.scale years(3~8 y).
作者
刘妮妮
孙芹芹
LIU Nini;SUN Qinqin(Yangtze University Collage of Technology & Engineering,Jingzhou 434020,China;Fujian Institute of Oceanography,Xiamen 361013,China)
出处
《现代电子技术》
北大核心
2019年第5期173-175,179,共4页
Modern Electronics Technique
基金
国家自然科学基金项目(40571164)
长江大学工程技术学院科学研究基金项目(2018KY09)~~
关键词
能谱计算
水热同步
人类活动影响
气温
降水量
年际气候变化
energy spectrum calculation
hydrothermal synchronization
human activity effect
air temperature
precipitation
annual climate change
