中文摘要：

基于在潮湿敏感的 Pinus sylvestris var 的地区性的树戒指年表(RC ) 之间的关系。mongolica 和月刊意味着最大的温度，年度降水和年度流量， Yimin 河的流量的重建为时期被执行 18682002。模型是稳定的并且能为 19562002 的刻度时期解释 52.2% 变化。在过去的 135 年期间， 21 极其干燥的年和 19 极其湿的年发生了。这些年分别地代表了 15.6% 全部的学习时期和 14.1% 。持续二年或更多的六个严重干旱事件发生在 19501951， 19861987， 19051909， 19261928， 19681969 和 19191920。四个更湿的事件发生在 19541959， 19321934， 19391940 和 19901991 期间。有为包围区域的另外的 tree-ring-based 流速及流水量重建或年表的比较在我们的重建供应了信心的高度。电源光谱和小浪分析建议在 Hulun Buir 区域和包围区域的重建的年度流量变化能与大规模大气海洋的可变性被联系，例如和平的十的摆动(PDO ) 和 El Ni ?o 南部的摆动(ENSO ) ，和太阳黑子活动。

英文摘要：

Based on the relationships between the regional tree-ring chronology （RC） of moisture-sensitive Pinus sylvestris var. mongolica and the monthly mean maximum temperature, annual precipitation and annual runoff, a reconstruction of the runoff of the Yimin River was performed for the period 1868-2002. The model was stable and could explain 52.2% of the variance for the calibration period of 1956-2002. During the past 135 years, 21 extremely dry years and 19 extremely wet years occurred. These years repre- sented 15.6% and 14.1% of the total study period, respectively. Six severe drought events lasting two years or more occurred in 1950-1951, 1986-1987, 1905-1909, 1926-1928, 1968-1969 and 1919-1920. Four wetter events occurred during 1954-1959, 1932-1934, 1939-1940 and 1990-1991. Comparisons with other tree-ring-based streamflow reconstructions or chronologies for surrounding areas supplied a high degree of confidence in our reconstruction. Power spectrum and wavelet analyses suggested that the reconstructed annual runoff variation in the Hulun Buir region and surrounding area could be associated with large-scale atmospheric-oceanic variability, such as the Pacific Decadal Oscillation （PDO） and E1 Nifio-Southern Oscillation （ENSO）, and sunspot activity.