1736-2000年黄河中下游地区降水变化的周期分析(英文)

编号 zgly0001586721

文献类型 期刊论文

文献题名 1736-2000年黄河中下游地区降水变化的周期分析(英文)

作者 郝志新  郑景云  葛全胜 

作者单位 InstituteofGeographicSciencesandNaturalResourcesResearchCAS  InstituteofGeographicSciencesandNaturalResourcesResearchCAS  Beijing100101China 

母体文献 Journal of Geographical Sciences 

年卷期 2008年01期

年份 2008 

分类号 P337 

关键词 waveletanalysis  precipitationcycles  climateforcing  middleandlowerreachesoftheYellowRiver  last300years 

文摘内容 Based on the long-term precipitation series with annual time resolution in the middle and lower reaches of the Yellow River and its four sub-regions during 1736-2000 recon- structed from the rainfall and snowfall archives of the Qing Dynasty, the precipitation cycles are analyzed by wavelet analysis and the possible climate forcings, which drive the precipita- tion changes, are explored. The results show that: the precipitation in the middle and lower reaches of the Yellow River has inter-annual and inter-decadal oscillations like 2-4a, quasi-22a and 70-80a. The 2-4a cycle is linked with El Nio events, and the precipitation is lower than normal year in the occurrence of the El Nio year or the next year; for the quasi-22a and the 70-80a cycles, Wolf Sun Spot Numbers and Pacific Decadal Oscillation (PDO) coincide with the two cycle signals. However, on a 70-80a time scale, the coincidence between solar activity and precipitation is identified before 1830, and strong (weak) solar activity is generally correlated to the dry (wet) periods; after 1830, the solar activity changes to 80-100a quasi-century long oscillation, and the adjusting action to the precipitation is be- coming weaker and weaker; the coincidence between PDO and precipitation is shown in the whole time series. Moreover, in recent 100 years, PDO is becoming a pace-maker of the precipitation on the 70-80a time scale.