JUMP - Data collection - Part I: Jets from a Global Climate Model.

We conduct in-depth analysis of statistical flow properties from Global Circulation Model that reproduce Saturn's macroturbulence, namely large-scale zonal winds. We use a high performance Global Climate Models (GCMs), named DYNAMICO, to model the atmospheric circulation of gas giants with appropriate physical parametrizations for Saturn's atmosphere. The high-resolution model DYNAMICO solves for 3D primitive equations of motion. We ran a Saturn simulation covering 15 Saturn years using the Saturn DYNAMICO GCM. Wind fields are output every 20 Saturn days at 32 pressure levels onto 1/2° latitude-longitude grid maps. Details on this Saturn reference simulation are given in Spiga et al. (2020). In addition, to diagnose the relevant 3D dynamical mechanisms in Saturn's turbulent atmosphere, we run a set of four simulations using an idealized version of our Global Climate Model devoid of radiative transfer, with a well-defined Taylor-Green forcing and over several rotation rates (4, 1, 0.5, and 0.25 times Saturn's rotation rate). Here, we deliver a full data set, including velocity maps, at different pressure levels and time steps, from which it is possible to recompute the statistical analysis detailed in Cabanes et al. (2020). The delivered data set includes:

Files of our (1) data collection and (2) numerical codes that lead to the statistical analysis:

(1) Data collection:

A PDF file named JUMP-zonal-jets-data-collection-Icarus.pdf that describes in depththe data set and the associated nomenclature.

A netcdf file of velocity fields from our Saturn Reference Simulation (SRS)

uvData-SRS-istep-312000-nstep-50-niz-12.nc

StatisticalData.nc

A netcdf file of velocity fields from idealized simulation at 4 times the Satrun's rotation rate,

uvData-Omega-4-istep-21026.0-nstep-20-niz-8.nc

A netcdf file of velocity fields from idealized simulation at 1 times the Satrun's rotation rate,

uvData-Omega-1-istep-21026.0-nstep-20-niz-8.nc

A netcdf file of velocity fields from idealized simulation at 0.5 times the Satrun's rotation rate,

uvData-Omega-0.5-istep-20626.0-nstep-20-niz-8.nc

A netcdf file of velocity fields from idealized simulation at 0.25 times the Satrun's rotation rate,

uvData-Omega-0.25-istep-21026.0-nstep-20-niz-8.nc

(2) Numerical codes:

Codes for statistical analysis in spherical geometry are on Github. --> https://github.com/scabanes/POST

Acknowledgments:

The authors acknowledge exceptional computing support from Grand Équipement National de Calcul Intensif (GENCI) and Centre Informatique National de l’Enseignement Supérieur (CINES). All the simulations presented in this paper were carried out on the Occigen cluster hosted at CINES. This work was granted access to the High-Performance Computing (HPC) resources of CINES under the allocations A001-0107548, A003-0107548, A004-0110391 made by GENCI. The authors acknowledge funding from Agence Nationale de la Recherche (ANR), project HEAT ANR-14-CE23-0010 and project EMERGIANT ANR-17-CE31-0007. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement N° 797012. Fruitful discussions with Sandrine Guerlet, Ehouarn Millour, Thomas Dubos, Frédéric Hourdin and Alexandre Boissinot from our team helped refine some discussions in the paper.