关键词: 晋陕蒙接壤区, 季风, 侵蚀

Abstract: Malan Loess,the major eroding surface layer in the Loess Plateau,was deposited during the last glacial period of late Pleistocene,at that time climate in the plateau was strongly influenced by winter monsoon. During the last interglacial period of Holocene, climate was strongly influenced by summer monsoon,precipitation was much higher than that in the last glacial period, and heavy rainfall caused severe erosion in the plateau. Due to greatest changes of coast lines in East China at latitude of38°,climate in the Jinshanmen contiguous region at same latitude has been the most changeable in the plateau,The region had the highest precipitation in the coarse Malan Loess zone of the plateau in Holocene. Owing to the combination of erodible surface layer and high precipitation,current soil erosion in the Jinshanmen contiguous region is the severest in the Loess Plateau.

Key words: Monsoon climate, Late Pleistocene, Loess Platea