Modelling in HD(CP)²

In the first funding phase, the HD(CP)² model (ICON-LEM) was developed from an existing ICON non-hydrostatic core. In the second phase of the project, the focus shifts from model development to adapting the model to different next generation high-performance computing hardware. This is done to improve the computational efficiency (i.e. time to solution) and is fostered by the collaboration between the Opens external link in new windowDKRZ (Deutsches Klimarechenzentrum) and the Opens external link in new windowFZJ (Forschungszentrum Jülich).

This certain topic will be addressed in work package 1 of the M module, "Optimization of sustained application performance". A central task of work package 2 is the implementation of a new sub-grid cloud cover scheme that enables hindcast simulations over the Opens internal link in current windowTropical Atlantic (TA) and Opens internal link in current windowNorthern Atlantic (NA) area. Moreover, the simulation model will be enhanced by implementing and improving online diagnostic functionality, which is done in work package 3. Generally, the M module will conduct the production of simulations with the ICON-LEM (Large-eddy model) as are requested by the six Opens internal link in current windowscientific projects of HD(CP)². These high-resolution simulations (O of 100 m) will be performed over the entire Opens internal link in current windowGermany domain (DE), as well as for TA and NA (work package 5).
Work package 4 will continue with the development of the end-to-end workflow of HD(CP)² simulations and the adaptation to support an automated execution chain that combines pre- and post-processing tools as well as a basic data management. The resource planning in order to successfully perform those ambitious model runs is done in work package 6.

The scientific projects within HD(CP)² will be assisted in using these tools to conduct additional model runs in project-internal Opens internal link in current windowworkshops.

A HD(CP)² model simulation of liquid cloud water, wind speed and vorticity over Germany. Liquid cloud water is shown in white, cloud ice in pink, and rainfall in blue. Wind speed is depicted with streams lines, where purple lines indicates low and yellow lines high wind speeds.

The HD(CP)² model and its scheduled simulations will be extremely ambitious regarding computing resources and data space. Moreover, the model enhancement will include the implementation of advanced online diagnostic tools for 3D visualization of features directly during the experiment runs.This is addressed in work package 3 "Model diagnostics", located at the Opens external link in new windowZIB.