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基于黄河中游4个水文站1919~2010年还原的天然径流量、1873~2011年的夏季风强度指数、北大西洋涛动指数(NAO)和西太平洋副高指数等资料,利用Morlet小波方法分析了黄河中游河口镇-龙门区间(简称河龙区间),龙门-三门峡区间(简称龙三区间)和三门峡-花园口区间(简称三花区间)径流量的周期变化,并探索了夏季风、中纬度西风与西太平洋副高等环流因子对黄河中游3个区间径流量周期性变化的影响。研究发现,黄河中游3个区间径流量的变化对夏季风、中纬度西风和西太平洋副高存在差异性响应,季风对于黄河中游的径流量不仅在时间上具有趋势性的影响,更为重要的是存在周期性的控制作用,在80 a长周期上对于整个黄河中游都有控制作用,但影响黄河中游降水-径流过程的不仅仅是夏季风,相关统计结果表明还受到西风带和西太平洋副高周期的影响。3个区间都存在一个中等尺度(25 a)的周期,这个周期在夏季风上没有得到体现,河龙区间和龙三区间的25 a周期是受西风带影响所致,而三花区间的中尺度25 a周期是西太平洋副高指数的强度和西界的作用所致。
Based on the natural runoff restored from 1919 to 2010, the summer monsoon intensity index from 1873 to 2011, the North Atlantic Oscillation Index (NAO) and the Western Pacific Subtropical High Index from four hydrological stations in the middle Yellow River, Morlet wavelet method was used to analyze The period variation of runoff in the Hekou-Longmen section of the middle reaches of the Yellow River, the Longmen-Sanmenxia section and the Sanmenxia-Huayuankou section (shortened as Sanhua section), and the effects of summer monsoon and mid-latitude Effects of the Westerly Winds and the Western Pacific Subopcity Circulation Factors on the Runoff Periodicity in Three Regions of the Middle Yellow River. The study found that the variation of runoff in the three regions of the middle reaches of the Yellow River has a different response to summer monsoon, mid-latitude westerlies and western Pacific subtropical high. It is more important for the runoff of the monsoon to the middle reaches of the Yellow River not only to have a trend of time Is a cyclical controlling factor that controls the entire middle reaches of the Yellow River for a long period of 80 years. However, the impact of the precipitation-runoff processes in the middle reaches of the Yellow River is not only the summer monsoon but also the correlation statistics show that it is also affected by the westerlies and the western Pacific vice High cycle impact. There is a period of medium-scale (25 a) in all three intervals. This period is not reflected in the summer monsoon. The 25 a period of the He’long and the Middle Long 3 periods is affected by the westerlies, while the middle The scale of 25 a cycles is due to the strength of the Western Pacific subtropical high and the role of the western boundary.