Ulrike Lohmann (ETHZ), Heikki Järvinen (UHEL)
CNRS, ETHZ, FMI, WU, UHEL
By using several ESMs coupled to a complex aerosol-chemistry module we seek to understand possible changes to robust regional and global signals, such as:
- Are shifts in the circulation regimes a consequence of the aerosol forcing across different ESMs?
- What is the effect of the large regional surface forcing by aerosols and associated changes in the hydrological cycle on vegetation, biogenic sources and sinks?
- Can we assemble enough knowledge on different feedbacks between biosphere, climate, and atmospheric aerosols and gases to identify major positive or negative feedbacks in relation to IPCC scenarios?
In order to address these questions, it is proposed to develop and include chemistry, cloud and aerosol modules for ESM’s that:
- Provide an improved description of sub grid-scale aerosol-cloud interactions
- Couple tropospheric chemistry with aerosols and clouds
- Include feedbacks with vegetation considering the role of carbon- and nitrogen cycle.