论文标题
使用检索到的卫星灰分和逆灰运输建模估算火山灰排放
Estimating volcanic ash emissions using retrieved satellite ash columns and inverse ash transport modelling
论文作者
论文摘要
本文介绍了在挪威气象研究所在操作上使用的反转程序，用于估算检索到的卫星灰分量和先验知识的灰分排放率。 总体过程包括五个阶段： （1）产生先验排放估计； （2）用单位排放的向前模拟； （3）与排放模拟的共同观察/匹配观测； （4）构建线性方程系统；和 （5）解决过度确定的系统。 我们通过数学基础，用于反转过程，合成案例的性能以及现实情况下的性能。本文的新颖性包括修剪用于反转和包含Ash Cloud Top高度观测的方程式线性系统。 此工作中使用的源代码可在开源许可下免费获得，并且可以用于其他类似应用程序。
This paper describes the inversion procedure being used operationally at the Norwegian Meteorological Institute for estimating ash emission rates from retrieved satellite ash column amounts and a priori knowledge. The overall procedure consists of five stages: (1) generate a priori emission estimates; (2) run forward simulations with unit emissions; (3) collocate/match observations with emission simulations; (4) build system of linear equations; and (5) solve overdetermined system. We go through the mathematical foundations for the inversion procedure, performance for synthetic cases, and performance for real-world cases. The novelties of this paper includes pruning of the linear system of equations used in the inversion and inclusion of observations of ash cloud top altitude. The source code used in this work is freely available under an open source license, and is possible to use for other similar applications.
