IGSNRR OpenIR
precipitationcyclesinthemiddleandlowerreachesoftheyellowriver17362000
HAO Zhixin; ZHENG Jingyun; GE Quansheng
2008
Source Publicationjournalofgeographicalsciences
ISSN1009-637X
Volume18Issue:1Pages:17
AbstractBased 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 reconstructed 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 precipitation 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 Nino events, and the precipitation is lower than normal year in the occurrence of the El Niho 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 becoming 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.
Language英语
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/115713
Collection中国科学院地理科学与资源研究所
Affiliation中国科学院地理科学与资源研究所
First Author Affilication中国科学院地理科学与资源研究所
Recommended Citation
GB/T 7714
HAO Zhixin,ZHENG Jingyun,GE Quansheng. precipitationcyclesinthemiddleandlowerreachesoftheyellowriver17362000[J]. journalofgeographicalsciences,2008,18(1):17.
APA HAO Zhixin,ZHENG Jingyun,&GE Quansheng.(2008).precipitationcyclesinthemiddleandlowerreachesoftheyellowriver17362000.journalofgeographicalsciences,18(1),17.
MLA HAO Zhixin,et al."precipitationcyclesinthemiddleandlowerreachesoftheyellowriver17362000".journalofgeographicalsciences 18.1(2008):17.
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