Increasing resolution in global models - biases and climate changes
Speaker(s)
Description
Cet exposé analyse certains des avantages liés à l’amélioration de la résolution horizontale de la grille habituelle, de l’ordre de 100 km, à une grille de 25 à 50 km, voire de 10 km pour les océans, en utilisant des modèles climatiques mondiaux issus du projet PRIMAVERA.
Summary
This contribution discusses some of the benefits of increasing horizontal resolution from the traditional ~100-km grid to a 25–50-km grid, or even finer, to a ~10-km-ocean grid, using global climate models from the PRIMAVERA project.
First, we will explore whether increased resolution helps reduce long-standing biases in climate models, such as the double ITCZ or the cold bias in the North Atlantic, that undermine model credibility.
Then, we will study how resolving the mesoscale in the ocean can increase the North Atlantic and European climate sensitivity to a future increase in greenhouse gases.
Last, we introduce the STREAM project, a newly funded Spanish national project to study ocean mesoscale eddies’ role in the North Atlantic and Europe climate variability and predictability.
