Survey of the updated O2 line list in the HITRAN 2024 spectroscopic database

Published

August 8, 2025

Author(s)

Erin Adkins, Joseph Hodges

Abstract

Light-matter interactions involving molecular oxygen (O2) span numerous decades in the frequency of electromagnetic radiation and are important tomany thermophysical and thermochemical mechanisms, ranging from atmospheric remote sensing of greenhouse gases, aerosols, pollutants, temperature and pressure, visible and infrared radiative exchange in the upper atmosphere, ozone formation and decomposition, and the search for life beyond Earth, among many other examples. Here, we highlight advances in the quantitative spectroscopy of O2, for which updated band-specific, line-by-line parameters have been provided in the HITRAN2024 spectroscopic database. Theoretical results are presented for electric quadrupole transition intensities in the ground state of 16O2 and in the Noxon band in the near-infrared region, representing the first time this latter band has been included in HITRAN. Particular focus is placed on the 1.27 μm-, A- and B- bands of O2, in which intensities, line-shape and position parameters with improved accuracy and/or extended spectral coverage are presented. Corrections to the Schumann-Runge band are also reported. The paper closes with outlook and recommendations on key challenges in advancing our understanding of the spectroscopy of O2.

Citation

Journal of Quantitative Spectroscopy and Radiative Transfer

Pub Type

Journals

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Keywords

HITRAN database, O2, line intensity, line shape parameters

Citation

Adkins, E. and Hodges, J. (2025), Survey of the updated O2 line list in the HITRAN 2024 spectroscopic database, Journal of Quantitative Spectroscopy and Radiative Transfer, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=960013 (Accessed November 23, 2025)