Does Ground Surface Soil Aggregation Affect Transition of the Wind Speed Threshold for Saltation and Dust Emission?

被引：23

作者：

Ishizuka, M. ^{[1
]}

Mikami, M. ^{[2
]}

Yamada, Y. ^{[3
]}

Kimura, R. ^{[4
]}

Kurosaki, Y. ^{[4
]}

Jugder, D. ^{[5
]}

Gantsetseg, B. ^{[5
]}

Cheng, Y. ^{[4
]}

Shinoda, M. ^{[4
]}

机构：

[1] Kagawa Univ, Takamatsu, Kagawa 7610396, Japan

[2] Meteorol Res Inst, Tsukuba, Ibaraki 305, Japan

[3] RIKEN, Wako, Saitama, Japan

[4] Tottori Univ, Arid Land Res Ctr, Tottori 680, Japan

[5] Inst Meteorol Hydrol & Environm, Ulaanbaatar, Mongolia

来源：

SOLA | 2012年 / 8卷

关键词：

GRASSLANDS;

D O I：

10.2151/sola.2012-032

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

A new dust observation site was built in Tsogt-Ovoo, which is located in the northern Gobi Desert in Mongolia, to clarify wind erosion processes. Ten dust events were detected from March 24 to May 4, 2012. Strong winds (greater than 20 m s(-1) at an altitude of 3 m) blew predominantly from the west. Clear relationships among wind speed, saltation and particulate matter concentrations less than 10 mu m (PM10) were detected. A transition in the wind speed threshold for saltation was observed at Julian day (JD) 111 (April 20); before JD 111, the threshold was 14.0 m s(-1), but it decreased to 8.8 m s(-1) after JD 111. We discuss the reason for this threshold discontinuity, focusing on the ground surface conditions. It is hypothesized that this discontinuity is caused by the destruction of the surface soil aggregation.

引用

页数：4

共 14 条

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Kurosaki, Y.
Mikami, M.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2007, 112 (D17)
[2] The dust emission law in the wind erosion process on soil surface
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SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY, 2009, 52 (02): : 258 - 269
[3] The dust emission law in the wind erosion process on soil surface
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2 State Key Laboratory of Multiphase Flow in Power Engineering
Science China(Physics,Mechanics & Astronomy), 2009, (02) : 258 - 269
[4] The dust emission law in the wind erosion process on soil surface
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Science in China Series G: Physics, Mechanics and Astronomy, 2009, 52 : 258 - 269
[5] A Method for Estimating the Threshold Wind Speed for Dust Emissions as a Function of Soil Moisture
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[6] A Method for Estimating the Threshold Wind Speed for Dust Emissions as a Function of Soil Moisture
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[7] EVALUATION OF THE EFFECT OF SOIL MOISTURE AND WIND SPEED ON DUST EMISSION USING AERONET, SEVIRI, SOIL MOISTURE AND WIND SPEED DATA
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[8] Seasonal variations in threshold wind speed for saltation depending on soil temperature and vegetation: A case study in the Gobi Desert
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[9] Does the size distribution of mineral dust aerosols depend on the wind speed at emission?
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ATMOSPHERIC CHEMISTRY AND PHYSICS, 2011, 11 (19) : 10149 - 10156
[10] Comprehensive Effect of Soil Particle Size Composition and Wind Speed on Dust Emission Efficiency
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JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2024, 129 (03)

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