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ManyZonalJets.jl

Build Status

The zonal jet initial conditions from Galewsky, 2004 but for many/multiple zonal jets for SpeedyWeather's shallow-water model.

Usage

using SpeedyWeather
using ManyZonalJets

spectral_grid = SpectralGrid(trunc=85, nlev=1)
initial_conditions = ZonalJets(latitude=[45,0,-45])
orography = NoOrography(spectral_grid)
model = ShallowWaterModel(;spectral_grid, orography, initial_conditions)
simulation = initialize!(model)
run!(simulation, period=Day(6))

using ManyZonalJets exports the ZonalJets type. spectral_grid defines the resolution to be T85 (~165km global). ZonalJets initial conditions are then created with jets at 45˚N, 0˚, 45˚S. NoOrography is used as in Galewsky, 2004. Then create a ShallowWaterModel with those components, initialize! and run! the simulation for 6 days.

Gallery

At T127 vorticity evolves like

vor.mp4

with mountains via orography = EarthOrography(spectral_grid) we have instead

vor.mp4

Installation

ManyZonalJets.jl is not registered, so you have to install it manually with Julia's package manager (open it with ])

(@v1.10) pkg> add https://github.com/SpeedyWeather/ManyZonalJets.jl

Or alternatively, using Pkg, then Pkg.add("https://github.com/SpeedyWeather/ManyZonalJets.jl") (which is equivalent).