笔者通过对比实验,论证了一种新的测量黄土样品容重的方法——浸油法的精确度和稳定性,并以甘肃灵台剖面为研究对象,测量了L9以上厚约70m的风尘黄土-古土壤堆积序列的容重值。结果表明,古土壤地层单元的容重值要明显高于其上下的黄土层,其变化范围为2.05～2.18g/cm~3,而黄土层的容重值变化范围为1.85～1.98g/cm~3;L9以上不同层位的黄土和古土壤单元容重值随深度变化不大,说明受天然压实作用的影响很弱。通过对比容重和磁化率序列,发现受粉尘源区干燥度、冬季风环流强度和沉降区气候条件综合控制的容重指标,不仅记录了轨道时间尺度的东亚冬、夏季风的相互交替演化,而且典型冰期的容重变化可能揭示了更短时间尺度的季风气候变化信息。 Through comparative experiments, the author demonstrates a new method for measuring the bulk density of loess samples - the precision and stability of the oil immersion method. Taking the Lingtai section of Gansu as the research object, the authors measured the dust loess-paleo Bulk density of soil accumulation sequence. The results show that the unit weight value of paleosol units is obviously higher than that of the upper and lower loess layers, and the range of variation is 2.05 ~ 2.18g / cm ~ 3, while that of loess layer ranges from 1.85 ~ 1.98g / cm ~ 3 The values ​​of bulk density of loess and paleosol with different layers above L9 changed little with the depth, which indicated that the influence of natural compaction was very weak. By comparing the bulk density and susceptibility series, it is found that the volumetric weight index, which is controlled by the dryness of dust source area, the strength of winter monsoon circulation and the climatic conditions in the subsidence area, not only records the alternation of East Asian winter monsoon and summer monsoon on orbital time scales, Changes in bulk density in the ice age may reveal monsoon climate change information on a shorter time scale.