The influence of sand surface temperature on wind erosion dynamic process

doi:10.7522/j.issn.1000-694X.2023.00052

Journal of Desert Research ›› 2023, Vol. 43 ›› Issue (6): 10-19.DOI: 10.7522/j.issn.1000-694X.2023.00052

The influence of sand surface temperature on wind erosion dynamic process

Bin Wang¹^,²^,⁵(), Qingjie Han¹^,², Bing Liu³^,⁴, Baheti Teliewuhan⁶, Guli Sagen⁶

^1.Key Laboratory of Desert and Desertification /, Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China
^2.Dunhuang Gobi and Desert Ecology and Environment Research Station /, Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China
^3.Linze Inland River Basin Research Station /, Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China
^4.Key Laboratory of Ecohydrology of Inland River Basin, Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China
^5.University of Chinese Academy of Sciences，Beijing 100049，China
^6.Xinjiang Lop Nur Wild Camel National Nature Reserve Administration，Urumqi 830000，China

Received:2023-03-13 Revised:2023-04-21 Online:2023-11-20 Published:2023-11-30

Abstract

Abstract:

Numerous studies on soil erodibility have demonstrated that sand surfaces at low temperatures are more susceptible to wind erosion. However， these studies have mostly been conducted in low altitude regions at middle and low latitudes， and the models derived from them may not be entirely applicable to cold regions at higher altitudes. In this study， we conducted wind tunnel simulation experiments using surface sand from Cuonahu Lake on the Qinghai-Tibetan Plateau. We utilized high and low temperature experimental chambers to adjust the sand surface temperature and quantified the relationship between wind erosion rate and sand surface temperature under different grain size and wind speed conditions. Our goal was to analyze the influence of surface temperature on the dynamic process of wind erosion and the underlying mechanism driving it. The result shows that：（1） There is a negative linear correlation between sand surface temperature and wind erosion rate， and the low temperature sand surface is more prone to wind erosion. This is similar to the mechanism by which air temperature affects the wind erosion process， the low temperature sand surface can increase the near-surface air density and airflow drag force， which makes the sand particles easier to start and the wind erosion rate increases； In addition， the temperature difference between the sand surface and the air， which destabilizes the atmosphere and affects the intensity of turbulence and the intensity of wind erosion， may also be a major mechanism by which the temperature of the sand surface affects the wind erosion process. （2） Under natural conditions， the cold sand surface can cause water in gas to condense， which inhibits the process of sand initiation and wind erosion. This effect is more pronounced on surfaces with low wind speeds and coarse-grained sand. （3） Additionally， high temperature sand surfaces can also partially inhibit wind erosion. These experimental results suggest a new direction for future wind and sand protection in alpine areas. Therefore， as one of the crucial natural factors influencing wind erosion in alpine regions， the temperature of the sand surface plays a vital role in regulating the wind erosion process in typical wind-sand areas on the Qinghai-Tibet Plateau. This study enhances our comprehension of the impact of surface temperature on wind erosion and offers theoretical backing for the development of sand control projects in alpine regions.

Key words: sand surface temperature, wind erosion process, wind erosion rate, alpine region

CLC Number:

P931.3

Bin Wang, Qingjie Han, Bing Liu, Baheti Teliewuhan, Guli Sagen. The influence of sand surface temperature on wind erosion dynamic process[J]. Journal of Desert Research, 2023, 43(6): 10-19.

Figures/Tables 8

References 51

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气压/hPa	沙面温度/℃	沙面与气流交界面空气密度/(kg·m^-3)
920	-20	1.266
	0	1.174
	20	1.093
	40	1.024
	60	0.962

气压/hPa	沙面温度/℃	沙面与气流交界面空气密度/(kg·m^-3)
920	-20	1.266
	0	1.174
	20	1.093
	40	1.024
	60	0.962

沙面温度/℃	空气密度/(kg·m^-3)	风速/(m·s^-1)	a	b	c	R²
-20	1.266	9	518.25	-707.00	208.74	0.68
		12	6 187.76	-9 167.75	3 133.55	0.87
		15	7 957.51	-15 598.53	7 601.87	0.97
0	1.174	9	813.45	-1 115.11	332.41	0.71
		12	4 475.12	-6 879.11	2 491.65	0.90
		15	6 719.62	-13 058.45	6 318.47	0.94
20	1.093	9	710.16	-970.01	287.31	0.70
		12	9 542.32	-13 644.47	4 407.73	0.84
		15	5 923.05	-12 547.34	6 538.05	0.96
40	1.024	9	576.05	-784.14	230.53	0.69
		12	4 875.95	-7 365.14	2 596.92	0.91
		15	7 117.68	-1 3371.45	6 259.11	0.94
60	0.962	9	603.72	-814.58	235.47	0.62
		12	3 859.66	-5 843.13	2 065.85	0.89
		15	8 022.93	-14 265.62	6 276.72	0.97

沙面温度/℃	空气密度/(kg·m^-3)	风速/(m·s^-1)	a	b	c	R²
-20	1.266	9	518.25	-707.00	208.74	0.68
		12	6 187.76	-9 167.75	3 133.55	0.87
		15	7 957.51	-15 598.53	7 601.87	0.97
0	1.174	9	813.45	-1 115.11	332.41	0.71
		12	4 475.12	-6 879.11	2 491.65	0.90
		15	6 719.62	-13 058.45	6 318.47	0.94
20	1.093	9	710.16	-970.01	287.31	0.70
		12	9 542.32	-13 644.47	4 407.73	0.84
		15	5 923.05	-12 547.34	6 538.05	0.96
40	1.024	9	576.05	-784.14	230.53	0.69
		12	4 875.95	-7 365.14	2 596.92	0.91
		15	7 117.68	-1 3371.45	6 259.11	0.94
60	0.962	9	603.72	-814.58	235.47	0.62
		12	3 859.66	-5 843.13	2 065.85	0.89
		15	8 022.93	-14 265.62	6 276.72	0.97

粒径 /mm	风速/(m·s^-1)	系数a	系数b	R²
0.15	9	-0.759	239.560	0.271
	12	-55.764	4 242.000	0.872
	15	-13.523	4 909.900	0.598
0.2	9	-0.632	119.460	0.539
	12	-18.342	2 272.200	0.982
	15	-13.253	5 129.400	0.753
0.25	9	-0.800	56.740	0.800
	12	-1.571	1 244.400	0.694
	15	-5.666	3 270.960	0.674
0.315	9	-0.036	2.345	0.892
	12	-5.481	626.160	0.995
	15	-18.342	3 236.760	0.987
0.4	9	-0.046	2.695	0.868
	12	-2.451	353.360	0.980
	15	-19.319	3 011.040	0.686
0.6	9	-0.005	0.285	0.862
	12	-0.860	76.660	0.997
	15	-16.556	1742.130	0.985
0.8	9	0.002	-0.155	0.124
	12	-0.002	0.045	0.145
	15	-0.026	9.100	0.109

The influence of sand surface temperature on wind erosion dynamic process

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Figures/Tables 8

References 51

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粒径 /mm	风速 /(m·s^-1)	0 ℃冷凝水质量/g	-20 ℃冷凝水质量/g
0.8	9	1.09	1.34
	12	0.63	1.27
	15	—	—
1.0	9	0.98	1.56
	12	0.81	1.10
	15	1.02	0.89

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