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风速越大,黄土的沉积通量越大。因此研究距今15万年以来中国北方干旱半干旱地区的古相对风速的时空变化,为古风场的重建提供依据。结果表明,在空间变化上,古风速自西向东逐渐减小。在时间变化上,晚更新世以来各剖面所反映的风速有较大差异,冰期的古相对风速是间冰期的1.54-2.32倍(塔勒德剖面是1.55倍、盘子山剖面是1.75倍、延长剖面是1.54倍、库伦沟剖面是2.32倍),古相对风速的时空变迁反映了各区域独特的地形和气候控制系统。
The greater the wind speed, the greater the flux of loess sedimentation. Therefore, the spatial and temporal variations of paleo-relative wind speed in the arid and semi-arid regions of northern China since 150000 years have been studied to provide the basis for the reconstruction of the ancient wind field. The results show that in the spatial variation, the paleo-wind speed decreases gradually from west to east. In the time variation, the wind speed reflected by each profile has a big difference since the late Pleistocene. The paleo-relative wind speed in glacial period is 1.54-2.32 times of that in interglacial period (1.55 times in Talaed section and 1.75 times in Panzhi Mountain section) Section is 1.54 times, Coulomb groove profile is 2.32 times), the paleo-relative wind and time changes reflect the unique terrain and climate control system in each region.