Wind erosion and dust emission in the core area of Hexi Corridor-Taklimakan Desert edge in 2000-2023

doi:10.7522/j.issn.1000-694X.2024.00152

Journal of Desert Research ›› 2024, Vol. 44 ›› Issue (6): 330-341.DOI: 10.7522/j.issn.1000-694X.2024.00152

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Wind erosion and dust emission in the core area of Hexi Corridor-Taklimakan Desert edge in 2000-2023

Yu Xing¹^,²(), Benli Liu¹(), Tao Ma³, Yimeng Wang¹^,²

^1.Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands / Dunhuang Gobi and Desert Ecology and Environment Research Station，Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China
^2.University of Chinese Academy of Sciences，Beijing 100049，China
^3.Gansu Institute of Soil and Water Conservation，Lanzhou 730020，China

Received:2024-09-23 Revised:2024-11-05 Online:2024-11-20 Published:2024-12-06
Contact: Benli Liu

Abstract

Abstract:

This study utilizes the Wind Erosion Prediction System （WEPS） algorithm， combined with multi-source geographical data， to calculate soil wind erosion and PM₁₀ in the core area of the battle against desertification along the Hexi Corridor-Taklimakan Desert edge since 2000. It analyzes the spatiotemporal variation characteristics and primary influencing factors. The results indicate that within the total study area of 806 700 km2， the multi-year average wind erosion modulus is 3 553 t·km^-2， with high wind erosion concentrations observed in the southeastern margin of the Taklamakan Desert and the central Hexi Corridor. Overall， due to decreasing wind speeds， increasing vegetation cover， and increased precipitation in the study area， the wind erosion modulus exhibits a downward trend， with an average decrease rate of 41 t·km^-2 per decade， and the area experiencing reduction accounts for 48% of the total. Meanwhile， the annual average PM₁₀ emission is 3.11×10⁷ t， with an average annual rate of 38.53 t·km^-2. Among the seasons， spring exhibits the highest wind erosion modulus， accounting for 47% of the annual total. Correlation analysis reveals that wind speed， vegetation cover， and soil moisture are key influencing factors， with wind speed contributing over 90% to wind erosion.

Key words: Hexi Corridor-Taklimakan Desert edge, soil wind erosion, PM₁₀, WEPS

CLC Number:

P931.3

Yu Xing, Benli Liu, Tao Ma, Yimeng Wang. Wind erosion and dust emission in the core area of Hexi Corridor-Taklimakan Desert edge in 2000-2023[J]. Journal of Desert Research, 2024, 44(6): 330-341.

Figures/Tables 13

Fig.1 Overview of study area

Table 1 Data sources

变量	时期	数据类型	时间/空间分辨率	变量用途
风速	2000—2023年	NetCDF	1 h/0.25°	用于估算风蚀量和PM₁₀释放量，是风蚀和起尘的主要驱动力
土壤含水量	2000—2023年	NetCDF	1 d/0.25°	用于估算风蚀量和PM₁₀释放量，是风蚀和起尘的主要驱动力
土壤数据	—	GeoTIFF	—/0.05°	用于估算土壤的可蚀性和起尘能力
NDVI	2000—2023年	HDF	8 d/0.05°	反映植被覆盖和健康状况，影响土壤表面抗风蚀能力
EVI	2000—2023年	HDF	8 d/0.05°
LAI	2000—2023年	GeoTIFF	16 d/500 m
降水量	2000—2023年	NetCDF	月/0.5°	影响土壤湿度和植被生长，间接影响风蚀和PM₁₀释放速率
温度	2000—2023年	NetCDF	月/0.25°	影响土壤湿度和植被生长，间接影响风蚀和PM₁₀释放速率

Fig.2 Spatial distribution of annual average wind erosion modulus in study area from 2000 to 2023

Fig.3 Spatial distribution of wind erosion intensity in study area

Fig.4 Spatial distribution of seasonal wind erosion modulus in study area in Spring （A）， Summer （B）， Autumn （C）， Winter （D）

Fig.5 Annual average wind erosion modulus changes in study area from 2000 to 2023

Fig.6 Spatial distribution of trends in wind erosion modulus changes in study area from 2000 to 2023 （Positive and negative values indicate increasing and decreasing trends， respectively. The absolute value of the numbers represents the degree of change， classified as extremely significant， significant， slight， and insignificant， in descending order）

Fig.7 Trends in seasonal （A） and monthly （B） wind erosion modulus changes in study area from 2000 to 2023

Fig.8 Spatial distribution of annual average PM10 emission rates in study area from 2000 to 2023

Fig.9 Spatial distribution of average wind speed （A）， soil moisture （B）， and NDVI （C） in the study area from 2000 to 2023

Fig.10 Spatial distribution of correlation coefficients （Left） and partial correlation coefficients （Right） between wind erosion and influencing factors （wind speed， soil moisture， and NDVI） in study area from 2000 to 2023 （Asterisks indicate statistical significance at the 95% confidence level）

Fig.11 Dominant factors driving the evolution of wind erosion in study area from 2000 to 2023（regression analysis passes the 95% significance test）

Fig.12 Trends of climatic factors in study area from 2000 to 2023（Positive and negative values indicate increasing and decreasing trends， respectively. The absolute value of the numbers represents the degree of change， classified as extremely significant， significant， slight， and insignificant， in descending order）

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Wind erosion and dust emission in the core area of Hexi Corridor-Taklimakan Desert edge in 2000-2023

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