%0 Journal Article %T Chemical weather forecasting: a new concept of integrated modelling %A A. Baklanov %J Advances in Science and Research (ASR) %D 2010 %I Copernicus Publications %R 10.5194/asr-4-23-2010 %X During the last decade a new field of atmospheric modelling ¨C the chemical weather forecasting (CWF) ¨C is quickly developing and growing. However, in the most of the current studies and publications, this field is considered in a simplified concept of the off-line running chemical transport models with operational numerical weather prediction (NWP) data as a driver. A new concept and methodology considering the chemical weather as two-way interacting meteorological weather and chemical composition of the atmosphere is suggested and discussed. The on-line integration of mesometeorological models and atmospheric aerosol and chemical transport models gives a possibility to utilize all meteorological 3-D fields in the chemical transport model at each time step and to consider feedbacks of air pollution (e.g. urban aerosols) on meteorological processes/climate forcing and then on the atmospheric chemical composition. This very promising way for future atmospheric simulation systems (as a part of and a step to Earth System Modelling) will lead to a new generation of models for meteorological, environmental and chemical weather forecasting. The methodology how to realise the suggested integrated CWF concept is demonstrated on the example of the European Enviro-HIRLAM integrated system. The importance of different feedback mechanisms for CWF is also discussed in the paper. %U http://www.adv-sci-res.net/4/23/2010/asr-4-23-2010.html