多源遥感数据沙尘暴强度监测的信息可比方法

Information-comparable method of monitoring the intensity of dust storm by multisource data of remote sensing

综述了利用遥感技术进行沙尘暴监测研究的国内外进展 ,提出了利用多源遥感数据识别和提取沙尘暴信息的新方法 ,利用近红外 1 .6 μm波段特性 ,构建了可比沙尘强度指数。研究表明 :利用卫星探测器 1 1 μm ,1 2 μm波段差值进行沙尘暴信息识别和提取 ,可以达到满意的效果 ,但不能刻画沙尘暴强度 ;构建的可比沙尘强度指数 ,能够解决多源遥感数据由于卫星平台、监测时间、监测区域等不同因素导致的监测结果不可比的问题 ;同时监测结果与地面气象站监测数据有较好的一致性 ,能够从时间、空间两方面刻画沙尘暴强弱分布 ,可以作为沙尘暴定量研究的参数 ,为利用多源遥感数据持续定量地监测沙尘暴的起源、移动、传输路径。

Based on the advance in research on dust storm by remote sensing , this paper presents a new approach of identifying and extracting dust storm information by multisource data of remote sensing as well as a new index of comparable dust storm intensity by the nature of 1.6μm of NIR. The result shows that it can result in a good effect using the spectrum of 11μm and 12μm when identifying and extracting dust storm information, but it can not indicate the intensity of dust storm; The comparable dust storm index can resolve many unmatched problem coming from the difference of sensor of satellite, monitoring time and monitoring region. In addition, the monitoring result of remote sensing is consistent with the data of ground perfectly, which can indicate the distribution of dust storm intensity temporally and spatially. As a good parameter of dust storm, the index is a perfect method to persistently and quantitatively monitor the source, moving track and diffusion of dust storm by using multisource data of remote sensing.