ATMOSPHERIC DUST LOADS AND SPATIAL DIFFERENCE IN NORTH CHINA SINCE LATE PLEISTOCENE: RECORDS FROM TYPICAL SECTIONS

Four loess sections of Talede、Panzishan、Yanchang and Kulungou have been selected as typical sections to recover the ancient dust load quantity and their temporal and spatial distributions in this paper. Magnetic susceptibility curve, particle content curve, load curve and δ¹⁸O(‰) content curve are used as paleoclimate proxies for study of ancient dust load quantity. The results show that the amount of dust load is higher in glacial stage than that in interglacial stages(A difference may be as high as 1.34-4.34 times),and changes in dust load is characterized by high-frequency fluctuation in the glacial. With regard to the spatial distribution, dust load decreases from the west to the east. The distribution of dust load could be used as a proxy for environmental and climatic reconstruction.