Quantitative detection of mass concentration of sand-dust storms via wind-profiling radar and analysis of <Emphasis Type="Italic">Z</Emphasis>-<Emphasis Type="Italic">M</Emphasis> relationship |
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| Authors: | Email author" target="_blank">Minzhong?WangEmail author Hu?Ming Zheng?Ruan Lianhui?Gao Di?Yang |
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| Institution: | 1.CMA (China Meteorological Administration),Urumqi Institute of Desert Meteorology,Urumqi,China;2.Atmospheric Environment Observation Experimental Station in Taklimakan Desert,Xinjiang,China;3.Northwest Regional Air Traffic Administration Bureau,CAAC (Civil Aviation Administration of China),Xi’an,China;4.State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,Beijing,China |
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| Abstract: | With the aim to achieve quantitative monitoring of sand-dust storms in real time, wind-profiling radar is applied to monitor and study the process of four sand-dust storms in the Tazhong area of the Taklimakan Desert. Through evaluation and analysis of the spatial-temporal distribution of reflectivity factor, it is found that reflectivity factor ranges from 2 to 18 dBz under sand-dust storm weather. Using echo power spectrum of radar vertical beams, sand-dust particle spectrum and sand-dust mass concentration at the altitude of 600 ～ 1500 m are retrieved. This study shows that sand-dust mass concentration reaches 700?μg/m3 under blowing sand weather, 2000?μg/m3 under sand-dust storm weather, and 400?μg/m3 under floating dust weather. The following equations are established to represent the relationship between the reflectivity factor and sand-dust mass concentration: Z?=?20713.5?M 0.995 under floating dust weather, Z?=?22988.3?M 1.006 under blowing sand weather, and Z?=?24584.2?M 1.013 under sand-dust storm weather. The retrieval results from this paper are almost consistent with previous monitoring results achieved by former researchers; thus, it is implied that wind-profiling radar can be used as a new reference device to quantitatively monitor sand-dust storms. |
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