i Detection of Smoke and Dust Aerosols Using Multi-sensor Satellite ...
i Detection of Smoke and Dust Aerosols Using Multi-sensor Satellite ...
i Detection of Smoke and Dust Aerosols Using Multi-sensor Satellite ...
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CHAPTER 4<br />
DUST AEROSOL MONITORING WITH MODIS MEASUREMENTS<br />
Asian dust storm, originates in Mongolia <strong>and</strong> northern China <strong>and</strong> Kazakhstan, is a<br />
seasonal meteorological phenomenon. Every year, thous<strong>and</strong>s <strong>of</strong> tons <strong>of</strong> dust are<br />
transported by the prevailing winds in springtime into eastern China, North <strong>and</strong> South<br />
Korea, <strong>and</strong> Japan, <strong>and</strong> Pacific Ocean. Sometime, these airborne dust particulates<br />
impacted the air quality as far as the North American. The severe dust storms transported<br />
by wind great impact the financial trade, industrial production, transportation, daily<br />
activity, <strong>and</strong> endanger human’s life. <strong>Detection</strong> dust storm in a timely manner can give<br />
alarm to people to take measures to avoid economic even vital loss. The detecting results<br />
are also very useful for the atmospheric modeling <strong>and</strong> simulation. An algorithm based on<br />
multi-spectral technique is developed combining measurements <strong>of</strong> six MODIS RSBs <strong>and</strong><br />
TEBs. Similar to the development <strong>of</strong> smoke detection algorithm, the b<strong>and</strong>s are selected<br />
according to the spectral analysis <strong>and</strong> the thresholds <strong>of</strong> each test are decided with the<br />
statistical analysis. Several dust storm events are selected as example cases to test the<br />
algorithm. The results are validated with MODIS true color images in this chapter <strong>and</strong><br />
validated quantitatively with multi-<strong>sensor</strong> measurements in chapter six.<br />
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