nichollsh / AGNI

A 1D radiative-convective model for the atmospheres of hot terrestrial planets.
https://nichollsh.github.io/AGNI/
1 stars 1 forks source link

Fix strange behaviour in O2-N2 continuum #58

Open nichollsh opened 3 days ago

nichollsh commented 3 days ago

The O2-N2 continuum is producing spuriously strong absorption at the red-end of its range. This is approximately from 5.3 um to 7.8 um (bands 132-152 in Honeyside256).

I have tested various gas combinations, and it seems that only this pair is impacted. I don't know why. It is derived from HITRAN, which is trustworthy, so maybe there's some issue in the spectral file generation.

As a workaround, I have disabled O2 opacities in AGNI through the variable atmosphere.BLACKLIST_RT. It is treated properly in most of the code, but the O2 mass mixing ratio passed to radiance_calc is always set to zero.

The literature source for this continuum can be found here: https://opg.optica.org/ao/fulltext.cfm?uri=ao-36-3-563&id=60415