摘要
应用近500年的旱涝史料和现代降水量资料,对宁夏引黄灌区、中部干旱带和南部山区三个区域进行时段为百年的旱涝特征及演变趋势的诊断分析;通过11年旱涝等级序列滑动平均来探讨其周期变化规律及变化趋势,采用交叉谱分析方法,得到了太阳活动对宁夏地区旱涝的影响尺度、幅度及响应时间,以说明旱涝变化与这些因素的相关程度;并采用功率谱分析方法提取显著周期。
Using historical data of drought and flood and morden precipitation and applying moving-average of 11 years,we analyzed and diagnosed the characteristic and trend of change of drought and flood in Yellow River irrigated area,middle arid area and south mountain part of Ningxia.Utilizing Cross-Spectrum,we found the solar activity effected on scale and amplitude and response time of change of drought and flood,and explained the relevance between these factors and change of drought and flood.Using power spectraldensity analysis we drew its significant period.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2011年第7期69-74,共6页
Journal of Arid Land Resources and Environment
基金
2009年中国气象局气候变化专项项目(CCSF-09-04)
2011年中国气象局气候变化专项(CCSF2011-26)资助
关键词
旱涝
诊断分析
外强迫因子
显著周期
drought and flood
diagnostic analysis
extra-forcing
significant period
