Modeling

opticaldepth(P₁, P₂, g, 𝒻T, 𝒻μ, θ, absorbers...; tol=1e-5)

Compute monochromatic optical depths ($\tau$) between two pressure levels

Arguments

• P₁: first pressure level [Pa]
• P₂: second pressure level [Pa]
• g: gravitational acceleration [m/s$^2$]
• 𝒻T: temperature [K] as a function of pressure [Pa], 𝒻T(P). This may be any callable object, like MoistAdiabat, for example.
• 𝒻μ: mean molar mass as a function of temperature [K] and pressure [Pa], 𝒻μ(T,P)
• θ: angle [radians] of path, must be ∈ [0,π/2), where 0 is straight up/down
• absorbers: at least one gas object and any number of CIATables and functions in the form σ(ν, T, P)

Returns a vector of optical depths across all wavenumbers stored in gas objects. The tol keyword argument adjusts integrator error tolerance.

transmittance(τ)

Evaluate transmittance from optical depth, $t = e^{-τ}$

transmittance(P₁, P₂, g, 𝒻T, 𝒻μ, θ, absorbers...; tol=1e-5)

Compute monochromatic transmittances. between two pressure levels

Accepts the same arguments as opticaldepth and returns a vector of transmittances across all wavenumbers stored in gas objects.

outgoing(Pₛ, g, 𝒻T, 𝒻μ, absorbers; Ptop=1.0, nstream=5, tol=1e-5)

Compute outgoing monochromatic radiative fluxes [W/m$^2$/cm$^{-1}$], line-by-line. Integrates the schwarzschild equation from Pₛ to Ptop at each wavenumber in the provided gas object(s) using any number of streams/angles. Total flux [W/m$^2$] can be evaluated with the trapz function. This function does not include reflected stellar radiation, which is accounted for in topfluxes and topimbalance

Arguments

• Pₛ: surface pressure [Pa]
• g: gravitational acceleration [m/s$^2$]
• 𝒻T: temperature [K] as a function of pressure [Pa], 𝒻T(P). This may be any callable object, like MoistAdiabat, for example.
• 𝒻μ: mean molar mass as a function of temperature [K] and pressure [Pa], 𝒻μ(T,P)
• absorbers: at least one gas object and any number of CIATables and functions in the form σ(ν, T, P)

Keywords

• Ptop: top of atmopshere pressure [Pa]
• nstream: the number of atmospheric streams (radiation angles) to calculate and integrate
• tol: integrator error tolerance

The keyword argument nstream specifies how many independent streams, or beam angles through the atmosphere, to integrate. The keyword argument tol is a numerical error tolerance passed to the radau integrator.

AcceleratedAbsorber(P, T, G::UnifiedAbsorber)
AcceleratedAbsorber(P, T, absorbers...)

An accelerated struct for getting cross-sections from groups of absorbers. Pressure and temperature coordinates must be provided.

update!(A::AcceleratedAbsorber, T)

Update the cross-section interpolators underlying an AcceleratedAbsorber with a new set of temperatures. The new temperatures should correspond to the pressure levels used when originally constructing the AcceleratedAbsorber.