Preliminary research on the sand storm disaster in China

When new century comes up,sand storm,raise dust and floating dust weather have happened twelve times in Beijing, bringing great response.According to the 67773 item records of sand storm from the Chinese weather stations during last fifty years after new nation established,it is shown that the sand storm of appearance covers a large region,but the Northwest of China is the center of disaster,it is similar to desertification land distribution.Before 1970 sand storm frequency increased but human didn't pay attention to that because of weak realization of ecoenvironment. From 1970 to 1980 sand storm was the highest frequency,from 1980 to 1990 sand storm frequency in the limited areas had been decreased and the strength reduced.But with regional economy growing,sand storm brings a significent economical loss.The vegetation construction and the environment improvement will give large functions to the decrease of sand storm disaster.