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

[11] Determination of the wind speed threshold for the emission of desert dust using satellite remote sensing in the thermal infrared
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JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1999, 104 (D24) : 31207 - 31215
[12] A study on the effects of soil moisture, air humidity, and air temperature on wind speed threshold for dust emissions in the Taklimakan Desert
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NATURAL HAZARDS, 2019, 97 (03) : 1069 - 1081
[13] A study on the effects of soil moisture, air humidity, and air temperature on wind speed threshold for dust emissions in the Taklimakan Desert
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Natural Hazards, 2019, 97 : 1069 - 1081
[14] Tillage effects on soil surface conditions and dust emission by wind erosion in semiarid Aragon (NE Spain)
Lopez, MV
Sabre, M
Gracia, R
Arrue, JL
Gomes, L
SOIL & TILLAGE RESEARCH, 1998, 45 (1-2): : 91 - 105

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