Institute for Atmospheric Physics

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Global models

Global models of the atmosphere are traditionally used in weather forecasting and climate research. Global numerical weather prediction (NWP) models predict the temporal development of the state of the atmosphere within a period of one or two weeks on the basis of an accurate as possible analysis of the initial conditions. The spatial resolution can be as high as the available computer capacity permits.

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	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.
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	EMAC The numerical global atmosphere-chemistry model EMAC (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, their interaction with the ocean and land surfaces, and of anthropogenic influences.
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	ICON The dynamic core of the ICON (icosahedral non-hydrostatic general circulation model) is a joint of the Max Planck Institute (MPI) for Meteorology and the German Weather Service. The climate version of ICON, developed at MPI for Meteorology, combines this new dynamic core with the physics approaches of the climate model ECHAM. ICON should become the future German climate model.
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Model evaluation
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	ESMValTool 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 means, trends and variability of essential climate variables (ECVs) in the models on a range of temporal and spatial scales and additionally includes process-oriented evaluation.
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Further models
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	Mesoscale models 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.
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	Microscale models 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.
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	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.
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	Radiative transfer models Various numerical models are used at the institute to study radiative transfer in the atmosphere and the interaction between radiation and clouds or aerosol. Our workhorse is the program package libRadtran (Library for Radiative Transfer), which already includes a selection of different methods.
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	Contrail Cirrus Prediction Model (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.
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Global models

ECHAM

EMAC

ICON

Model evaluation

ESMValTool

Further models

Mesoscale models

Microscale models

Sound propagation models

Radiative transfer models

Contrail Cirrus Prediction Model (CoCiP)