干旱区生态环境知识资源中心(Arid): The Wind-Blown Sand Experiment in the Empty Quarter Desert: Roughness Length and Saltation Characteristics

Arid

DOI	10.1029/2024EA003512
	The Wind-Blown Sand Experiment in the Empty Quarter Desert: Roughness Length and Saltation Characteristics
	Nelli, Narendra; Francis, Diana; Sow, Mamadou; Fonseca, Ricardo; Alkatheeri, Abdulrahman; Bosc, Emmanuel; Bergametti, Gilles
通讯作者	Francis, D
来源期刊	EARTH AND SPACE SCIENCE
EISSN	2333-5084
出版年	2024
卷号	11 期号:6
英文摘要	The Empty Quarter Desert, one of Earth's major dust sources, frequently experiences dust storms due to wind erosion. Despite its significance as a primary dust source on a global scale, in-situ observations from this region had not been reported until very recently. In summer 2022, the WInd-blown Sand Experiment (WISE) Phase-1 was initiated in the Empty Quarter Desert of the United Arab Emirates, and continued until 7 February 2023. Utilizing a diverse array of instruments, we measured winds, temperature, humidity, radiation fluxes, saltation, and the physical and optical properties of dust aerosols, atmospheric electric fields, and soil characteristics. A total of 38 distinct sand-saltation events were recorded from September 2022 to February 2023, with activity peaking between 13:00 and 14:00 local time. Key findings include the identification of dominant wind patterns, and the measurement of the average aerodynamic roughness length (z0) at 0.8 +/- 0.6 mm, and the thermal roughness length (zh) at 0.3 +/- 0.5 mm-the first estimation of zh for this area. In-situ observations revealed that dust particle concentrations near the surface increased 1.7-fold on days with saltation compared to days without it. Moreover, we determined a wind-speed threshold for initiating saltation at 7.70 m s-1. This comprehensive data set significantly advances our understanding of atmospheric-soil interactions and sand movement dynamics, providing invaluable insights for ongoing research into desert environments and the global dust cycle. The Empty Quarter Desert, one of the Earth's major dust sources, frequently experiences dust storms due to wind erosion. Despite its importance as a main dust source on a global scale, no in-situ observations from this region have been reported until very recently. In the summer of 2022, the WInd-blown Sand Experiment (WISE) Phase-1 provided crucial data on the arid environment of the Empty Quarter Desert in the United Arab Emirates. Lasting until February 2023, this experiment focused on quantifying environmental and soil characteristics through an array of measurements, including wind direction and speed, temperature, humidity, radiation fluxes, and dust particle concentrations. The study revealed dominant wind patterns, quantified the aerodynamic and thermal roughness of the desert soil, and recorded 38 distinct sand movement events, noting a peak in activity during early afternoon hours. This research is significant for its detailed analysis of particle concentration changes during these events and its establishment of a specific wind speed threshold for sand movement in this region. These findings are invaluable for researchers studying desert environments, particularly in terms of understanding atmospheric-soil interactions and the dynamics of sand movement. First-of-its kind experiment in the Empty Quarter Desert to characterize environmental dynamics The first estimation of the thermal roughness length (zh) for this desert and is found to be 0.3 mm The derived wind-speed threshold for saltation at the Empty Quarter Desert is 7.70 m s-1
英文关键词	wind erosion saltation dust emission roughness length albedo sea breeze hyper-arid region
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001248610700001
WOS关键词	DUST EMISSION ; SUMMER MONSOON ; TRANSPORT ; AEROSOL ; FLUX ; THRESHOLD ; CYCLE ; FIELD ; GULF
WOS类目	Astronomy & Astrophysics ; Geosciences, Multidisciplinary
WOS研究方向	Astronomy & Astrophysics ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403309
推荐引用方式 GB/T 7714	Nelli, Narendra,Francis, Diana,Sow, Mamadou,et al. The Wind-Blown Sand Experiment in the Empty Quarter Desert: Roughness Length and Saltation Characteristics[J],2024,11(6).
APA	Nelli, Narendra.,Francis, Diana.,Sow, Mamadou.,Fonseca, Ricardo.,Alkatheeri, Abdulrahman.,...&Bergametti, Gilles.(2024).The Wind-Blown Sand Experiment in the Empty Quarter Desert: Roughness Length and Saltation Characteristics.EARTH AND SPACE SCIENCE,11(6).
MLA	Nelli, Narendra,et al."The Wind-Blown Sand Experiment in the Empty Quarter Desert: Roughness Length and Saltation Characteristics".EARTH AND SPACE SCIENCE 11.6(2024).