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Global models have been used in numerical weather prediction and climate research for a long time. Numerical weather prediction models make a forecast of the atmospheric state for up to two weeks based on an optimally determined initial state.
Global Climate Model ECHAM
The global climate model ECHAM was developed by the Max Planck Institute for Meteorology in Hamburg/Germany and by the University of Hamburg. At present the model version 5 is mainly used at the institute.
The global atmosphere-chemistry model EMAC
The numerical model EMAC (short for ECHAM/MESSy Atmospheric Chemistry) is a modular global climate and chemistry simulation system with sub-models for the calculation of processes in the troposphere and the middle atmosphere, its interaction with the ocean and land surfaces, and anthropogenic influences.
The dynamical core of the ICON (Icosahedral non-hydrostatic) general circulation model (GCM) is a co-development between the Max Planck Institute (MPI) for Meteorology and the German Weather Service (DWD). The climate model version of ICON, developed at MPI for Meteorology, combines this new dynamical core with the physics approaches of the climate model ECHAM. The ICON GCM is still under development but is thought to replace ECHAM within the next few years.
The ESMValTool for routine evaluation of Earth System Models
The Earth System Model Validation Tool (ESMValTool) is a diagnostics tool for the routine evaluation of Earth System Models (ESMs) with observations. It tests the representation of climatological mean states, trends, extreme events and variability of essential climate variables (ECVs) in the models on a range of temporal and spatial scales and additionally aims at a process-oriented evaluation. The development of the ESMValTool will improve the complex evaluation of ESMs with observations and process-understanding of the climate system on the long-term.
Mesoscale models are numerical tools which resolve atmospheric processes of spatial scales between 2 and 1000 km. They solve the conservation equations of mass, momentum, internal energy and diverse air constituents with different physical approximations.
Microscale models of the atmosphere are designed to simulate small-scale flow systems (e.g. turbulence, vortices, air flows over obstacles) with a horizontal length scale ranging between a few meters and some 100 m.
Sound propagation models
The Institute of Atmospheric Physics develops and operates advanced sound propagation models. In combination with meteorological mesoscale and microscale models they describe the system of atmosphere, topography and sound waves in a consistent manner.
Contrail Cirrus Prediction Tool (CoCiP)
The "Contrail Cirrus Prediction Tool" CoCiP has been developed to simulate contrail cirrus resulting from a single flight as well as from a fleet of cruising aircraft, flight by flight, regionally or globally. The method predicts contrail cirrus for given air traffic and weather prediction data.
Radiative Transfer Models
To study the radiation in the Earth's atmosphere and its interaction with water and ice clouds, aerosols, and molecules, we are developing and using several radiative transfer models, including a Matrix-Operator model (MOM), the libRadtran package, and the three-dimensional MYSTIC code.
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