Development of a numerical short range forecast model of fog and visibility

在拟议的研究项目中，将开发雾和能见度的数值短期预报模式。雾模型将基于德国气象局的本地模型（LM）。它将是三维的，以便可以模拟不同类型的雾，如辐射雾，平流雾和地形雾。在第一步中，将开发LM的微尺度版本，并在其中实现详细的光谱微物理云模块。在此基础上，提出了一种新的雾参数化方案。通过利用现有的测量雾事件的数据，数值个例研究将进行，以验证光谱微物理以及参数化雾模式。其目的是获得一个工具，数值有效的雾预报的位置，有利于雾的形成，并在高质量的雾预报是特别重要的，例如在机场，高速公路等，本研究的部分嵌入在成本722行动“雾，能见度和低云的短期预报方法”的欧洲委员会。

In the proposed research project a numerical short range forecast model of fog and visibility shall be developed. The fog model will be based on the Local Model (LM) of the German Weather Service. It will be three-dimensional so that different kinds of fog, such as radiation fog, advection fog, and orographic fog, can be simulated. In a first step a microscale version of the LM will be developed and a detailed spectral microphysical cloud module will be implemented therein. Based on this module a new parameterization scheme for fog will be developed. By utilizing available data of measured fog episodes, numerical case studies will be performed in order to verify the spectral microphysical as well as the parameterized fog model. The aim is to obtain a tool for a numerically efficient fog forecast at locations which are favourable for fog formation and where a high quality fog forecast is of particular importance, e.g. at airports, highways etc. Parts of this research are embedded in the COST 722 Action "Short range forecasting methods of fog, visibility and low clouds" of the European Commission.