Variability of East Asian winter monsoon in Quaternary climatic extremes in North China
China ; Climatic variability ; Grain size distribution ; Loess ; Magnetic susceptibility ; Monsoon ; Palaeoclimatology ; Palaeosol ; Plateau ; Quaternary ; Shaanxi ; Winter
In order to examine high-frequency variations of East Asian winter monsoon in Quaternary climatic extremes, two typical loess-paleosol sequences in the Chinese Loess Plateau were investigated : Upper sand and Lower sand have been sampled at Luochuan
and Xifeng. The grain size and magnetic susceptibility were measured for all samples. The intensified winter monsoon events show periodicities, with a dominant cycle of approximately 1450 yr. Millenial-scale variations of the winter monsoon may be caused
In this study, the AA. isolated monomineralic quartz from lacustrine sediments of Lake Biwa, central Japan, identified atmospherically transported quartz grains in the sediments, and inferred variations in the intensity of East Asian winter monsoon
-glacial conditions. The episodic cutting and filling of gullies implies a basic astronomical (orbital) control of gully evolution involving cyclic changes in dominant summer and winter monsoon climates, surface hydrology, and vegetation cover.