Limited area model

Limited area model#

A numerical campaign was performed in parallel to ORCESTRA, which consisted in daily hindcasts simulations of the Atlantic ITCZ.

These limited-area models (LAMs) were run with ICON-MPI at a horizontal resolution of 1.25km, and covered the (64W-8W,4S-24N)-area. Each daily run was initialized from the (day-1)-00h00 IFS analysis, and marched in times for 48h using the IFS forecast for lateral and surface boundary conditions. The first 24h are considered a transient time, as the solution adapts to the high-resolution mesh and non-hydrostatic solver. A concatenation of all second days is shown below, illustrating the complexity of the campaign:

Tracks of ATR-42, HALO and RV METEOR simulated with the Limited Area Model throughout the campaign (by R. Fievet).

Further, animations of key variables were constructed to showcase all runs. These are available at different “zoom-levels” 1, 2 and 3, corresponding to horizontal resolutions of 5.0, 2.5 and 1.25 kilometers, respectively. All animations can be found in this publicly-accessible server, and are presented below as well.

The whole dataset is stored on Levante (DKRZ) and accessible on demand. It comprises of high-sampling rate 2D and 3D snapshots of key variables.

Limited area model

Contents

Limited area model#

Daily simulations#