130ka来陕北黄土高原北部的气候变迁

CLIMATIC CHANGE IN THE NORTHERN SHAANXI LOESS PLATEAU DURING THE LAST 130 000 YEARS

根据陕北黄土高原北部两个典型的地层剖面的岩性特征、磁化率曲线等古气候相关指标，认为１３０ｋａ来该区域气候经历了四个明显的暖湿期与干冷期的交替变化。这与黄土高原洛川剖面所反映的古气候旋回及深海氧同位素曲线变化趋势基本吻合，并与全球气候变化具有同步性。

We believe that the northern Shaanxi Loess Plateau has experienced 4 periods of humid-warm and dry- cold climatic changes after studying the magnetic susceptibility curve, the lithologicalcharacters of stratum and other palaeoclimatic indicators of 2 regions in northern Shaanxi. This iscoincident with the trend of the palaeo-climatic change and the deep-sea oxygen isotope curve changerepresented by the loess section of Luochuan, Shaanxi and suggests that the climatic change of thisregion during the last 130 000 years is synchronous with that of the whole earth.