MERGE (Modelling ModElling the Regional and Global Earth system) is a new strategic research area. Reliable modelling of the Regional and Global Earth system is of utmost importance for society. The project deals with research to reduce the uncertainties pertain to climate sensitivity, Earth System feedbacks and interactions and to incomplete understanding of key climate forcings and the interplay of physical and biological climate/Earth System components. This can be tackled with research that in turn supports mitigation and adaptation efforts on global, regional and local arenas.
The overall aim within this subproject of MERGE is to formulate and validate a model framework linking vegetation, aerosols, clouds and their climate feedbacks, using a combination of laboratory studies, field studies and modelling. Process parameterizations will be tested in the EMEP chemical transport model and evaluated against field observations, then to be included in climate models. We focus in particular on the representation of the C and N cycles, emissions of biogenic volatile organic compounds (BVOCs) and N-based trace gases from ecosystems, the subsequent atmospheric oxidation of BVOCs and their secondary organic aerosol (SOA) formation potential, with consequences for clouds, global radiation and precipitation.
This project is supported by Formas as a strategic Research Area (http://www.cec.lu.se/forskning/merge)