Characterization of the spatio-temporal distributions, emission rates and deposition velocities of different aerosol components through assimilating satellite aerosol component observations into a tropospheric chemistry transport model for air quality for

该项目的目标是确定并利用大气建模与不同气溶胶类型的卫星观测相结合所增加的信息内容。两个先进的组成部分，即类型分辨卫星气溶胶检索方法（SYNAER - SYNergetic Aerosol Retrieval）和多分辨率化学传输模型（EURAD -欧洲空气污染扩散模型系统），包括一个复杂的气溶胶模块（MADE -模态气溶胶动力学模型为欧洲）集成。这是通过变分数据同化（3D和4D），包括所有可用的误差特性（协方差矩阵）的数据和模型预测。利用这种方法，可以充分利用ENVISAT（气象卫星）和未来METOP（气象业务平台）数据的全部价值，提供欧洲和北方半球对流层粒子时空分布的改进的短期（即长达72小时）预报。项目的另一个重点是研究结果对综合方法中基本假设的敏感性。特别是系统误差，由于不同设置的气溶胶粒径模式在反演和模式将进行研究。通过现场观测对结果进行全面验证，将确定该方法的优点、误差和局限性。

The goal of this project is to identify and take advantage of the increased information content of combining atmospheric modeling with satellite observations of different aerosol types. Two advanced components, namely a type-resolving satellite aerosol retrieval method (SYNAER - SYNergetic AErosol Retrieval) and a multi-resolution chemistry transport model (EURAD - EURopean Air pollution Dispersion model system) including a sophisticated aerosol module (MADE - Modal Aerosol Dynamics Model for Europe) are integrated. This is done by variational data assimilation (3D and 4D) including all available error characteristics (covariance matrices) of data and model forecast. With this methodology the full value of ENVISAT (ENVIrionmental SATellite) and future METOP (METeorological Operational Platform) data can be exploited to provide improved short term (i.e. up to 72 hours) forecasts of the spatio-temporal distribution, of tropospheric particles over Europe and the Northern hemisphere. The study of sensitivities of the results to basic assumptions in the integrated approach will be another focus of the project. Especially systematic errors due to the different setup of aerosol size modes in retrieval and model will be investigated. A thorough validation of the results by in situ observations will define the benefits, errors and limitations of the approach.