气候变化领域集成服务门户(CCPortal): Field Observation Evidence for Kink Points in the Vertical Kinetic Energy Flux Profiles of Wind-Blown Sand Over Gobi and Its Significance

CCPortal

DOI	10.1029/2020GL091224
	Field Observation Evidence for Kink Points in the Vertical Kinetic Energy Flux Profiles of Wind-Blown Sand Over Gobi and Its Significance
	Tan L.; Qu J.; Wang T.; Zhang K.; An Z.
发表日期	2021
ISSN	0094-8276
卷号	48 期号:3
英文摘要	Wind-blown sand over Gobi can cause severe sand abrasion. The vertical flux profiles, especially that of the kinetic energy (KE), determine the erosion intensity. However, the vertical distribution of the KE flux of wind-blown sand over Gobi remains poorly understood. Here, we report comprehensive field-based measurements of the vertical flux profiles of wind-blown sand over three typical Gobi surfaces during four transport events. The results show that unlike the exponential decrease in the particle count flux with height, the KE flux profile curve was non-monotonic and could be well fitted by a Pearson VII function. The height where the maximum KE flux density occurred (kink points) ranged from 0.09 to 0.15 m above the ground. In addition, the non-monotonic KE flux profiles primarily emerged during periods of strong transport and were mainly caused by large saltating sand particles due to their high KE as they rebounded from the grain-bed collision. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Erosion; Kinetic energy; Kinetics; Erosion intensity; Field observations; Field-based measurements; Particle counts; Transport events; Vertical distributions; Vertical fluxes; Wind-blown sands; Sand
语种	英语
来源期刊	Geophysical Research Letters
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169156
作者单位	Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China; Dunhuang Gobi Desert Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Science, Dunhuang, China; Key Laboratory of Earth Surface Processes and Environmental Change of Tropical Islands, Hainan Province, China; School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou, China
推荐引用方式 GB/T 7714	Tan L.,Qu J.,Wang T.,et al. Field Observation Evidence for Kink Points in the Vertical Kinetic Energy Flux Profiles of Wind-Blown Sand Over Gobi and Its Significance[J]. 中国科学院西北生态环境资源研究院,2021,48(3).
APA	Tan L.,Qu J.,Wang T.,Zhang K.,&An Z..(2021).Field Observation Evidence for Kink Points in the Vertical Kinetic Energy Flux Profiles of Wind-Blown Sand Over Gobi and Its Significance.Geophysical Research Letters,48(3).
MLA	Tan L.,et al."Field Observation Evidence for Kink Points in the Vertical Kinetic Energy Flux Profiles of Wind-Blown Sand Over Gobi and Its Significance".Geophysical Research Letters 48.3(2021).