1.2～0.6MaBP青藏高原的隆升与东亚地表各圈层的相互作用

结合近年来黄土、河流阶地、冰冻圈、沙漠、植被等地表各个圈层在1.2～0.6 MaBP青藏高原构造隆升期间环境变化的最新研究成果,综合论述了在此期间青藏高原的隆升对地表其他各个圈层的影响.研究表明:1.2～0.6 MaBP期间,青藏高原的隆升对东亚地表环境产生了重大影响,中国内陆主要沙漠(主要是西部沙区的沙漠)在这一时期形成并极端扩张;黄土在祁连山、昆仑山、天山等高山山前和西秦岭等地开始大范围地堆积;以昆仑山和念青唐古拉山为代表的西部高山开始了冰冻圈的发育,各地植被变化都不同程度地反映了环境的逐步干旱化.结合这些研究,提出了1.2～0.6 MaBP期间东亚地表圈层间相互作用的简单模式,并探讨了青藏高原隆升与地表圈层变化之间的内在耦合.

Interaction between the Qinghai-Tibet Plateau uplift and the East Asian environment from 1.2 to 0.6 MaBP

Integrating the latest scientific efforts on the history of the Qinghai-Tibet Plateau uplift, river terrace, loess, glaciations, desert and ecology, the interaction between multi-spheres of the East Asia in 1.2~0.6 MaBP are discussed in this paper. Recent studies indicated that the environmental changes, including the desert and loess deposition expansion of Northwest China, the evolvement of the mountainous glacier, and the stepwise aridity suggested by the pollen and spore investigation 1.2-0.6 MaBP, have interacted with each other. Interestingly, the tectonic uplift coupled temporally with changes of other spheres, which suggests some unraveled mechanisms. These interior mechanisms are discussed primarily in this paper and meanwhile, the uplift of the Qinghai-Tibet Plateau, as the amplifier of East Asian environment in the investigation interval and its interaction mechanism with other Earth system, is also displayed by a simple conceptual model here.