Variation Characteristics of Wind Speed Profile and PM_(10) Concentration during Typical Dust Weather in Inner Mongolia

Based on the data of the wind speed and PM10 mass concentration at 20 m weather tower of Zhurihe Area from Jan of 2005 to Apr.of 2006,the evolvement characteristics of wind speed profile in near surface layer and PM10 in three representative dust weather processes(dust storm,blowing sand and floating dust)were analyzed.The results showed that wind speed was higher during dust storm and blowing sand with obvious vertical gradient.The speed in floating dust was relatively lower and increased during the whole process.In general,wind speed after dust weather was smaller with respect to that before the weather.The average mass concentrations PM10 in the process of dust storm,blowing sand and floating dust were in the ranges of 5 436.38-10 000,1 799.49-4 006.06 and 1 765.53 μg/m3,respectively.