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Observation of volcanic ash from Puyehue-Cordon Caulle with IASI

机译:IASI观测Puyehue-Cordon Caulle火山灰

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摘要

On 4 June 2011 an eruption of the Chilean volcano complex Puyehue-Cordon Caulle injected large amounts of volcanic ash into the atmosphere and affected local life as well as hemisphere-wide air traffic. Observations of the Infrared Atmospheric Sounding Interferometer (IASI) flown on board of the MetOp satellite have been exploited to analyze the evolution of the ash plume around the Southern Hemisphere. A novel singular vector-based retrieval methodology, originally developed for observation of desert dust over land and ocean, has been adapted to enable remote sensing of volcanic ash. \udSince IASI observations in the 8–12 μm window are applied in the retrieval, the method is insensitive to solar illumination and therefore yields twice the observation rate of the ash plume evolution compared to solar backscatter methods from polar orbiting satellites. The retrieval scheme, the emission characteristics and the circumpolar transport of the ash are examined by means of a source-receptor analysis.
机译:2011年6月4日,智利火山群Puyehue-Cordon Caulle的喷发,向大气中注入了大量火山灰,影响了当地生活以及半球范围的空中交通。已利用在MetOp卫星上飞行的红外大气探测干涉仪(IASI)的观测来分析南半球周围烟灰柱的演变。最初为观察陆地和海洋上的沙漠尘埃而开发的一种新颖的基于奇异矢量的检索方法已经过改进,可以实现火山灰的遥感。 \ ud由于在检索中应用了8-12μm窗口中的IASI观测,因此该方法对太阳光照不敏感,因此与极地轨道卫星的太阳反向散射方法相比,该方法产生的烟灰羽流观测速率是其两倍。通过源-受体分析检查了灰烬的回收方案,排放特性和沿极的迁移。

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