Atmosphere Modelling

Atmosphere Modelling Group


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The focus of the Atmosphere Modelling Group is to increase our process-based understanding of physical, meteorological and chemical mechanisms in the lower part of the troposphere. This includes the emissions of biogenic volatile organic compounds (BVOC) from different ecosystems with a special focus on boreal region, their vertical and horizontal distribution and their chemical reaction paths. Further the group investigates the formation and growth of secondary organic aerosols (SOA) inside the planetary boundary layer (PBL) and tries to improve our understanding of in- and below cloud formation and activation mechanisms, which is still far away from complete. We aim at finding process parameterizations that can be subsequently applied in climate predictions and reduce significant uncertainties therein.

The group uses a set of different models starting from the zero-dimensional box-model MALTE-BOX, the one-dimensional model SOSAA and the three-dimensional high-resolution regional model FLAMO. In addition to understand the impact of turbulence on the different processes we operate the large-eddy-simulation model (LES) ASAM and the direct numerical simulation model (DNS) PENCIL-CLOUD. The advantage of running all these models in one group is in the use of several modules like the aerosol module UHMA (University of Helsinki Multicomponent Aerosol model) in several models, which provides improvements in one process at similar time to other models. A short description for each individual model and related references are presented on our group website or are available on request from the group leader Dr Michael Boy.

Group website