Volcanic emissions from AIRS observations: detection methods, case study, and statistical analysis

摘要: Monitoring volcanic emissions is important for many reasons, most notably impacts on climate and possible hazards human health or aviation safety. Satellite instruments allow long-term monitoring of a global scale. In this paper we introduce new detection indices ash sulfur dioxide (SO2) that are optimized radiance measurements the Atmospheric InfraRed Sounder (AIRS). Radiative transfer calculations used to determine sensitivity index (AI) aerosol optical depth SO2 (SI) column density. A case study AIRS observations after eruption Puyehue Cord on-Caulle, Chile, in June 2011 demonstrates work practice. statistical analysis ten-year record (2002 2013) data provides AI thresholds help better discriminate from regular events such as dust storms. We compared our SI with operational product found it more sensitive suppresses interfering background signals. Our emission products have been successfully applied other scientic studies.