Carstens main activities have been within the BAMAP project (VKR foundation and Nordic Top Researcher Initiative) as a joint post doc fellowship and later continued within the SUPREME project (Danish research council and EU-FP7). SUPREME will be carried out at NPARU, University of Worcester from 2013-18. Both BAMAP and SUPREME are cross-disciplinary research projects within aerobiology that includes data analysis of bioaerosols, spatial modelling, meteorology and remote sensing using satellites and drone technology. Similar methods will also be used in the three projects “IPLATFORM”, "New approaches for the early detection of tree health pests and pathogens" and “PollerGEN”, funded by EU-Horizon2020 and the two UK Research Councils BBSRC and NERC, respectively. Further activities are mainly on chemical air pollution, recently carried in the ECLAIRE project (FP7 ~7 mio €) where he was task leader with respect further develop and model ammonia emissions in Europe.