摘要
干旱制约着人类经济和社会的发展,已经成为影响人类农业生产、社会稳定的重要因素。为精准把握干旱的演变规律,解决干旱驱动因素多样等问题,利用Copula熵理论对河南省1951—2014年逐月气象数据进行分析。结果表明:①河南省干旱序列存在长、短周期共存的现象,具有多时间尺度特征;②1991—2000年是干旱发生最为严重的10 a,随着时间的推移干旱呈现出从西南向东北方向转移的趋势;③在众多驱动干旱的影响因子中,降水量、气温、水汽压及相对湿度对干旱发生的影响最大。
As a restraint of human economic and social development,drought has become an important factor affecting human agricultural production and social stability.In order to accurately grasp the evolution law of the drought and to solve the problems such as various drought-driven factors,the entropy theory of Copula was used to analyze monthly meteorological data of Henan Province from 1951 to 2014.The results are as follows.Firstly,the drought sequence in Henan Province has the phenomenon of long and short period coexistence,which has the characteristics of multi-time scale.Secondly,drought occurred most seriously in the period from 1991 to 2000.With the passage of time,the severity of drought gradually has shifted from southwest to northeast.Finally,among the various factors affecting drought,precipitation,air temperature,water vapor pressure and relative humidity have the greatest impact on the occurrence of drought.
作者
温云亮
李艳玲
黄春艳
张泽中
WEN Yunliang;LI Yanling;HUANG Chunyan;ZHANG Zezhong(School of Information Engineering,North China University of Water Resources and Electric Power,Zhengzhou 450046,China;School of Mathematics and Statistics,North China University of Water Resources and Electric Power,Zhengzhou 450046,China;School of Water Conservancy,North China University of Water Resources and Electric Power,Zhengzhou 450046,China)
出处
《华北水利水电大学学报（自然科学版）》
2019年第4期51-56,共6页
Journal of North China University of Water Resources and Electric Power：Natural Science Edition
基金
河南省高等学校重点科研项目(19A120008)
贵州省水利厅科技攻关项目(KT201705)
关键词
气象干旱
干旱序列
驱动因子
Copula熵
河南省
meteorological drought
drought sequence
driving factor
Copula entropy
Henan Province
