干旱区生态环境知识资源中心(Arid): Influence of Wind Direction on the Size Distribution of Aeolian Microparticles

Arid

DOI	10.1134/S0001433821050108
	Influence of Wind Direction on the Size Distribution of Aeolian Microparticles
	Malinovskaya, E. A.; Chkhetiani, O. G.; Maksimenkov, L. O.
通讯作者	Malinovskaya, EA (corresponding author), Russian Acad Sci, Obukhov Inst Atmospher Phys, Moscow 119017, Russia.
来源期刊	IZVESTIYA ATMOSPHERIC AND OCEANIC PHYSICS
ISSN	0001-4338
EISSN	1555-628X
出版年	2021
卷号	57 期号:5 页码:472-485
英文摘要	In this paper, microparticle size distributions due to the wind direction - frontal and tangential in respect to the prevailing orientation of the dune crests are analyzed using field measurement data obtained during the 2010-2020 summer seasons in the arid conditions of the Near Caspian Lowland (Kalmykia, Russia). A smaller number of coarse-fraction microparticles (2-5 mu m) and a larger number of fine-fraction microparticles (0.2-2 mu m) are observed for the frontal wind direction in comparison with data for the tangential direction under similar conditions. The concentration of microparticles decreases for the frontal wind direction and increases for the tangential wind direction with the increase in friction dynamic velocity. Dust aerosol generation is associated with the movement of large particles near the surface by means of saltation or rolling (movement near the surface). The sizes of the generated microparticles are related to the momentum transferred to the particles in the layer. Concentrations of the fine fraction microparticles are associated with the presence of secondary aeolian structures on the surface of the windward slope and the relative change in the slope angle of inclination under the wind of different directions. This fraction generation due to shaking is more likely to occur when large particles move near the surface. The coarse-fraction concentrations are determined by the chipping processes that occur when a saltating particle blown from the top of the dune falls to the surface. When the wind direction is tangential and large irregularly shaped particles from the accumulation zone on the leeward slope are involved, the air circulation over the leeward slope weakens and the chipping processes intensify. The analytical derivation of the microparticle size distribution function and the comparison with field measurement data makes it possible to assess these effects in relation to the variation of angles of the aeolian-structure surface inclination and of particle velocities, which occur when the wind veers.
英文关键词	dust aerosol wind transport size distribution function
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000715824300004
WOS关键词	SANDY LAND AREA ; DUST EMISSION ; EROSION ; AEROSOL ; SLOPE ; DEPOSITION ; TRANSPORT ; TUNNEL ; LAYER ; FLUX
WOS类目	Meteorology & Atmospheric Sciences ; Oceanography
WOS研究方向	Meteorology & Atmospheric Sciences ; Oceanography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/367924
作者单位	[Malinovskaya, E. A.; Chkhetiani, O. G.; Maksimenkov, L. O.] Russian Acad Sci, Obukhov Inst Atmospher Phys, Moscow 119017, Russia
推荐引用方式 GB/T 7714	Malinovskaya, E. A.,Chkhetiani, O. G.,Maksimenkov, L. O.. Influence of Wind Direction on the Size Distribution of Aeolian Microparticles[J],2021,57(5):472-485.
APA	Malinovskaya, E. A.,Chkhetiani, O. G.,&Maksimenkov, L. O..(2021).Influence of Wind Direction on the Size Distribution of Aeolian Microparticles.IZVESTIYA ATMOSPHERIC AND OCEANIC PHYSICS,57(5),472-485.
MLA	Malinovskaya, E. A.,et al."Influence of Wind Direction on the Size Distribution of Aeolian Microparticles".IZVESTIYA ATMOSPHERIC AND OCEANIC PHYSICS 57.5(2021):472-485.