Journal of Geographical Sciences ›› 2005, Vol. 15 ›› Issue (4): 431-438.doi: 10.1360/gs050406

• Climate and Environmental Change • Previous Articles     Next Articles

The influence of different underlying surface on sand-dust storm in northern China

SONG Yang, QUAN Zhanjun, LIU Lianyou, YAN Ping, CAO Tong   

  1. College of Resources Science and Technology;
    Key Laboratory of Environmental Change and Natural Disaster, the Ministry of Education of China, Beijing Normal University, Beijing 100875, China
  • Received:2005-03-11 Revised:2005-05-09 Online:2005-12-25 Published:2010-10-23
  • Supported by:

    National Natural Science Foundation of China, No.30371191; The Ministry of Education of China, No.104013

Abstract:

In this paper, a quantitative research on the relationship between different underlying surface and sand-dust storm has been made by using 40 years meteorological data of five different types of underlying surface in northern China, which include farmland, grassland, sandland, gobi and salt crust. These metrological data comprise sand-dust storm days and strong wind days. By analyzing, we can find that there are certain correlations between the days of sand-dust storm and strong wind for different underlying surface, which has great influence on sand-dust storm. But there are pronounced differences in different types of underlying surface. The sand-dust storm days of grassland, gobi and salt crust, with smaller interannual variation are obviously less than strong wind days. On the other hand, the sand-dust storm days of farmland and sandland increase evidently, even in many years, are much more than strong wind days. The differences are mainly induced by the influencing mechanism of different underlying surface on sand-dust storm. Grassland, gobi and salt crust with stable underlying surface are not prone to sand-dust storm under strong wind condition. Whereas, the underlying surface of farmland and sandland is unstable, that is easy to induce sand-dust storm under strong wind condition.

Key words: sand-dust storm, underlying surface, strong wind, northern China