从会宁末次间冰期土壤看北大西洋气候不稳定性

A WINDOW TO VIEW CLIMATIC INSTABILITY OCCURRING AT NORTHERN ATLANTIC OCEAN FROM THE LAST INTERGLACIAL PALAEOSOL IN HUINING DURING MIS 5E

会宁李家塬与新庄塬高分辨率黄土剖面的粒度分析表明，末次间冰期氧同位素阶段5e时期，黄土高原地区处于较为稳定的气候环境．

This paper presents high resolution data from two typical aeolian sediment in thenorthwest of Chinese loess plateau and shows what climatic condition. occupied overcenter China during the MIS 5e period. The records in Lijiayuan show highpercentage of fine particles, smaller variations in average grain size, the highest MSvalues and lower accumulation rate during MIS 5e. The percentage of gaain sizecoarser than 50μm approaches zero during this stage. The diameter of mean priderecords in Xinzhuang yuan change smoothly. These suggest that the strength of wintermonsoon reduced and the range of aeolian prides surce decreased daring MIS 5e.It is inferred that the climate may probably be relahvely stable during MIS 5e overthe Chinese Loess Plateau and the scarce of dust genesis in accordance on the twoloess Profiles. The records of climatic change processes in Huming show differencewith the records of GRJP, but they are compatible with the records from ice core ofGISP2 and high resolution records of ice--rafted detritus and N. pachyderm in northAhantic ocean. So, the results suggest that the climatic instability occurring on MIS5e at high--latitude of northem Atlantic Ocean may be a local climatic signal.