| Weather and Climate |
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| Temporal and Spatial Characteristics of Dust Events in Northwest China |
| HAN Lan-ying1,2, ZHANG Qiang1, GUO Ni1, MA Peng-li2, HAN TAO2, WAN Xin2 |
1.Key Laboratory of Arid Climatic Change and Disaster Reduction of Gansu Province/Key Open Laboratory of Arid Climate Change and Disaster Reduction of CMA, Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730020, China;
2.Northwest Regional Climate Center, Lanzhou 730020, China |
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Abstract Sandstorm is a disastrous weather type and has obvious spatial-temporal characteristics. There is large area of sand-dust resource and strong wind in northwest China, so dust events frequently take place. Using sand event data from 158 weather stations in northwest China, we analyzed the spatial-temporal distribution of dust and sandstorm events based on GIS technology. Result indicated that dust events and sandstorm events had obviously seasonal variation, and the development area and degree of dust events and sandstorm were different in four seasons. The dust events and sandstorm took place most frequently in spring in northwest China, accounting for almost 50% of the total times. The affecting ranges of different degrees of dust or sandstorm events were different in four seasons. The range with light and middle frequency is relatively large in spring, and that with light and very light frequency is relatively large in summer, autumn and winter.
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Received: 18 May 2011
Published: 20 March 2012
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2012, Vol. 32 
