The Weather Factor in soil wind erosion area of northern China
1, Xueyong Zou1, Bo Liu1, Huiru Li1, Jingpu Wang2, Ruxing Wang1, Yi Fang1, Jifeng Li1
1State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, China, 2Institute of Geography and Planning, Ludong University, Yantai, China
Weather Factor (WF) in the Revised Wind Erosion Equation (RWEQ) is the potential ability of weather erosion. northern China is one of the serious soil wind erosion areas in the world. The purpose of this study was to investigate the spatial distribution of monthly WF in northern China, and to generate maps showing spatial variations of WF, wind factor (Wf), soil wetness, (SW) and snow cover (SD), which based on the daily data of 188 meteorological stations in the studying area. The results showed that the annual values of WF ranged from 0.03 to 253.81 kg/(m新), the regional average value is 9.1 kg/(m新), and only about a quarter of regional values are above the average. The mean values of WF are 19.63 kg/(m新) in spring, 5.72 kg/(m新) in summer, 6.09 kg/(m新) in autumn and 4.96 kg/(m新) in winter. As for the variation of a five-year average , the mean WF values of every period are 10.68 kg/(m新), 7.91 kg/(m新), 5.92 kg/(m新), 6.21 kg/(m新), 10.37 kg/(m新) and 10.42 kg/(m新) from 1980 to 2009, respectively, and the highest value appeared in the period of 1980-1984, which is almost 68.08% higher than other five periods.WF and Wf showed a similarity in spatial distribution, as well as SW and SD. The spatial patterns of WF, Wf, SW and SD are relatively stable, which are controlled by general circulation of atmosphere and topography.