近20 a蒙古国土壤风蚀变化特征及主要影响因素分析

doi:10.13866/j.azr.2022.04.21

Abstract

Abstract:

The accurate evaluation of wind erosion dynamics is important to reduce the damage caused by wind erosion in Mongolia. In this study, we used GLDAS, OLM, MOD13Q1, NASA-SRTM, and other meteorological and remote sensing data and the revised wind erosion equation model on the Google Earth Engine cloud computing platform to explore the spatio-temporal dynamics of soil wind erosion in Mongolia from 2001 to 2020. Results showed that wind erosion modulus had a significantly increased trend during the study period. In general, soil wind erosion tended to increase significantly over the last 20 years with the modulus of wind erosion increasing at a rate of 0.06 t·hm^-2·a^-1. Spatially, wind erosion was strong in the southern regions and weak in the northern regions. Meanwhile, wind erosion in spring accounted for 45% of the whole year. Changes in soil wind erosion in Mongolia were by and large identified with climatic factors and changes in vegetation cover, but they were also firmly identified with expanded anthropogenic exercises, for example, overgrazing and development of arable land. This study will provide a comprehensive understanding of the development trend of wind erosion desertification in Mongolia and a reference value to study dust storm in East Asia.

Key words: RWEQ model, wind erosion, influencing factors, Mongolia

GUO Yin,LEI Jiaqiang,FAN Jinglong,WANG Haifeng,LYU Zhentao. Soil wind erosion characteristics and main influencing factors in Mongolia in recent 20 years[J].Arid Zone Research, 2022, 39(4): 1200-1211.

Figures/Tables 15

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Soil wind erosion characteristics and main influencing factors in Mongolia in recent 20 years

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