Meteorological and hydrological modeling

i Andreas Beckert (UHH)
Modeling of three-dimensional weather fronts, ground pressure and wind visualized with Met.3D

Modeling aims to represent reality as accurately as possible. For this purpose, the natural processes are described by equations. Thus, not only the current state of the atmosphere or the soil is to be described, but also the future development is to be predicted. The results are weather or flood forecasts.

Even with ever faster mainframe computers with increasing storage capacities, there remains a limit beyond which small-scale processes can no longer be mapped. In addition, measurement data are not available at every location at every time, so the knowledge of the current state of the system remains relatively unprecise. Thus, even severe thunderstorms or floods may not be predicted.

The Swabian MOSES 2023 measurement campaign will collect a variety of meteorological and hydrological measurements that will be available for modeling. These measurements will be used in at least two ways: (1) To validate existing models. The prediction can be compared to the (later) measurement to see how good a prediction was. (2) For assimilation. The additional data can be used by the model to have a better picture of the system state at the start of the model run.

See the table for details on each department's plans.