The integration of atmospheric chemistry observations by next generation global/hemispheric and regional NWP models

This contribution provides a short bullet-wise overview for topic group 1 “Numerical weather and air quality forecasting”. Examples of current activities are provided and the status of atmospheric chemistry assimilation is discussed. The discussion follows the questions that were provided to the speakers prior to the workshop, and these questions are used as section headings. There is no attempt to be comprehensive - the topic is too extended for this - but I hope that several issues brought forward stimulate discussions during the meeting and afterwards, and are of relevance to the implementation of IGACO.