Welcome to Patrick Jöckel's Home Page

In Earth system modelling, the interacting domains (atmosphere, hydrosphere, cryosphere, ...) of the environment are simulated in conjunction to study the nature of feedbacks between the different domains and processes and how they influence the properties of the whole system.

Our group (in collaboration with colleagues from various institutes) develops and evaluates the Modular Earth Submodel System (MESSy). MESSy is especially suitable for Earth system studies, because it allows coupling different processes through a generalised interface structure to a base model and to switch them on and off independent of each other. The generalised interface allows coupling the same submodels to different base models, from three-dimensional atmospheric general circulation models to box models. As a first application with a strong focus on atmospheric chemistry, we built and evaluated the ECHAM/MESSy Atmospheric Chemistry (EMAC) model, which is a numerical chemistry and climate simulation system that includes submodels describing tropospheric and middle atmosphere processes and their interactions with oceans, land and human influences. It uses the first version of the Modular Earth Submodel System to link multi-institutional computer codes. The core atmospheric model is the 5th generation European Centre Hamburg general circulation model (ECHAM5). The main task of the Earth System Modelling Group is to apply ECHAM/MESSy for atmospheric research and to further develop it towards a comprehensive Earth System Model. For more specific information follow the "Projects"-links in the Menu on the left. More information about MESSy: http://www.messy-interface.org