会宁李家塬晚更新世黄土高分辨率的磁化率、粒度分析结果初步表明:北半球高纬地区的Dansgaard-OeschSer(D-O)旋回在中国黄土中亦有记录,意味着在格陵兰冰芯中发现的气候不稳定性同时存在于中、低纬度地区.黄土的颗粒变化进一步表明:中、低纬地区的不稳定性是叠加在全球冰量总体变化之上的,这点与格陵兰冰芯记录不同。 The results show that the Dansgaard-OeschSer (DO) cycles in the high latitudes of Northern Hemisphere are also recorded in Chinese loess, which means that the climate found in the Greenland ice core The instability exists in the middle and low latitudes, and the variation of the loess particles further indicates that the instability in the middle and low latitudes is superimposed on the global change in ice volume, which is different from that of the Greenland ice core record.