Analysis on mass concentration of dust aerosols in rough terrains of the Taklimakan Desert Hinterland
Authors: He Qing , Zhao Quanwei 
Published: March 2020

&lt;p&gt;A three-month experiment (June-August 2019) had been&amp;#160;carried out on the undulating terrain of the Taklimakan Desert. The mass concentration characteristics of PM&lt;sub&gt;2.5&lt;/sub&gt;&amp;#160;and PM&lt;sub&gt;10&lt;/sub&gt;&amp;#160;at different locations of the sand ridge were obtained, studying&amp;#160;the correlation between dust aerosol mass concentration and meteorological factors under different weather conditions. The results show that: (1) There are differences about&amp;#160;the concentration of PM&lt;sub&gt;2.5&lt;/sub&gt;&amp;#160;and PM&lt;sub&gt;10&lt;/sub&gt;&amp;#160;in&amp;#160;different locations of sand ridges under different typical weather conditions. The average mass concentration of PM&lt;sub&gt;2.5&lt;/sub&gt;&amp;#160;on sunny days meets: West Low Site&amp;#160;&gt; East Low Site&amp;#160;&gt; High Site, According to the dynamic &amp;#160;characteristic of PM&lt;sub&gt;10&lt;/sub&gt;, peak-valley value&amp;#160;of the three stations fluctuated sharply, and the daily average value of mass concentration shows: High Site&amp;#160;&gt; East Low Site&amp;#160;&gt; West Low Site. When the sand blowing and floating&amp;#160;weather occurred, the variation of PM&lt;sub&gt;2.5&lt;/sub&gt;&amp;#160;mass concentration meet the following rule: East Low Site&amp;#160;&gt; High Site, PM&lt;sub&gt;10&lt;/sub&gt;&amp;#160;shows the opposite law. When the first sandstorm occurs, the PM&lt;sub&gt;2.5&lt;/sub&gt;&amp;#160;mass concentration satisfies the following Law: West Low Site&amp;#160;10&amp;#160;mass concentration change is generally expressed as: West Low Site&amp;#160;2.5&amp;#160;and PM&lt;sub&gt;10&lt;/sub&gt;&amp;#160;meets: West Low Site&gt; High Site&gt; East Low Site&amp;#160;(2) Sunny Temperature&amp;#12289;&amp;#160;Atmospheric Pressure, Relative Humidity&amp;#160;of&amp;#160;east low site, high site&amp;#160;have a close correlation with PM&lt;sub&gt;2.5&lt;/sub&gt;, PM&lt;sub&gt;10&lt;/sub&gt;&lt;sub&gt;&amp;#160;&lt;/sub&gt;Mass Concentrations, the wind speed of&amp;#160;the west low site&amp;#160;and the high site&amp;#160;was significantly correlated with the PM&lt;sub&gt;2.5&lt;/sub&gt;&amp;#160;and PM&lt;sub&gt;10&lt;/sub&gt;&amp;#160;mass concentrations. When the dusty weather occurs, the wind speed has a significant effect on the mass concentration of dust aerosol in&amp;#160;the high site, and there is a significant positive correlation between the atmospheric pressure and the aerosol mass concentration in&amp;#160;the east low site&amp;#160;or high site. During the sand-dust weather&amp;#160;, the PM&lt;sub&gt;2.5&lt;/sub&gt;&amp;#160;and PM&lt;sub&gt;10&lt;/sub&gt;&amp;#160;mass concentrations were significantly negatively correlated with the atmospheric pressure&amp;#160;in the high sand dunes,&amp;#160;the correlation between wind speed and the PM&lt;sub&gt;2.5&lt;/sub&gt;&amp;#160;and PM&lt;sub&gt;10&lt;/sub&gt;&amp;#160;mass concentrations was greater than the East low Site. During the sandstorm, atmospheric pressure and temperature have a significant effect on the mass concentration of PM&lt;sub&gt;2.5&lt;/sub&gt;&amp;#160;and PM&lt;sub&gt;10.&lt;/sub&gt;&lt;/p&gt;