ICON - Modelling
An exciting component of EUREC4A is that high resolution modelling will be performed in support of field operations. For NARVAL2, through the DWD sponsored HErZ cooperation with MPI-M, 2.5 km cloud resolving simulations were being performed over the entire tropical Atlantic. These simulations included a 1.25 km nest over the western Atlantic and a yet finer (300 m) simulation nest over the area of flight operations. A prototype simulation, showing the wind field is illustrated in the animated gif below. During EUREC4A we anticipate being able to perform 300 m resolution simulations over the entire domain with finer (50-100 m) nested simulations over the flight area. Link to the DKRZ cloud storage system
The animation shows convection resolving ICON simulations over the tropical Atlantic accompanying the NARVAL campaigns (by Daniel Klocke, DWD and Matthias Brueck, MPI-M). Emergent phenomena are featured in unprecedented detail, ranging from cold-pools of small cumuli, interacting squall lines of deep convection to hurricanes evolving from breaking easterly waves. Over 40 days are already simulated within the period of NARVAL-I (Dec 2013) and NARVAL-II (Aug 2016). The model resolution is 2.5 km with a nested domain of 1.2 km over the western part of the domain. These results are further used as input to large-eddy simulations with ICON within the HD(CP)2 project.