中文摘要：

利用16年（2000-2015）的MODIS（the Moderate Resolution Imaging Spectroradiometer）数据对源于蒙古南部的112次沙尘天气进行了遥感监测与分析。研究表明通过MODIS真彩色合成影像和热红外波段亮度温度差识别、提取沙尘信息,可以实时、稳定快捷地获取沙尘来源、沙尘天气影响过程和范围等。多年多点的监测表明蒙古南部的沙尘主要起源于西南部山区和东南部平原,南部戈壁为重要的尘源补充,东南部沙尘源近年来有向北蔓延趋势。通过与MODIS土地利用数据和更高分辨率Landsat遥感数据进行叠置分析表明,利用MODIS土地利用等低空间分辨率数据判断沙尘源区仍然具有不确定性,沙尘源的研究还需要更高空间分辨率的遥感影像。作为东亚重要的沙尘源之一,蒙古南部沙尘源的解析对于理解全球沙尘问题,完善沙尘模型和灾害性沙尘天气的预测预报具有重要意义,并可据此因地制宜地提出科学有效的对策,从而实现人与环境的可持续发展。

英文摘要：

We used 16 - year （2000 - 2015） MODIS （ the Moderate Resolution Imaging Spectroradiometer） images to monitor and analyze 112 dust events from southern Mongolia. MODIS true color image and BTD algorithm provided quick and useful information to identify and retrieve dust generation, suspension and transport. In the south of Mongolia, dust mainly emitted from the southwestern mountainous region and the southeastern plain. During a dust event in the southwestern Mongolia, Gobi in the south provided surplus eolian sources. Dust sources in the southeast extended northwards in the past 16 years. The identification of dust sources needs high spatial resolution satellite images. As an important contributor to East Asian dust, the identification of dust sources in southern Mongolia will improve global dust cycle modeling and dust weather forecasting, and will be of great importance in proposing efficient countermeasures for sustainable human -environment development.