恢复晚更新世以来中国北方地区的古相对风速  

Recovery of relative wind speed in northern China since late pleistocene period

作　　者：赵锦慧[1] 何超[1] 鹿化煜[2] 黄超[1] 谢子瑞 

机构地区：[1]湖北大学资环学院,武汉430062 [2]南京大学地理与海洋科学学院,南京210093

出　　处：《干旱区资源与环境》2016年第6期60-64,共5页Journal of Arid Land Resources and Environment

基　　金：国家基金项目(41401559);湖北省科技厅项目(2014CFB558);湖北省教育厅项目(D20141001)资助

摘　　要：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 loess deposition flux. So the research,dating back to 15 million years ago,is in the relative velocity of the temporal and spatial variation of arid and semiarid area in North China,providing the basis for the reconstruction of ancient field. The results show that the speed of wind gradually decreased from east to west. In time variation,dating back to 15 million years since late pleistocene period,there existed many differences in each section. the relative wind speed in ancient glacial period was 1. 54- 2. 32 times faster than that of interglacial period（ 1. 55 times of Talede profile,1. 75 times of dish Hill section and 1.54 times of prolong the profile,2. 32 times of Coulomb channel section）. The variation of relative velocity of the temporal and spatial changes reflect the area＇s unique topography and climate control system.

关 键 词：晚更新世古环境 典型黄土剖面 沉降通量 恢复古风速 中国北方地区 古相对风速 

分 类 号：P468[天文地球—大气科学及气象学]