The DOI matches its Crossref record; 18 of the 18 references it cites were found in a registry or an index.
Temperature dependent absorption cross-sections of O2–O2 collision pairs between 340 and 630 nm and at atmospherically relevant pressure
Abstract
The collisions between two oxygen molecules give rise to O4 absorption in the Earth atmosphere. O4 absorption is relevant to atmospheric transmission and Earth's radiation budget. O4 is further used as a reference gas in Differential Optical Absorption Spectroscopy (DOAS) applications to infer properties of clouds and aerosols. The O4 absorption cross section spectrum of bands centered at 343, 360, 380, 446, 477, 532, 577 and 630 nm is investigated in dry air and oxygen as a function of temperature (203-295 K), and at 820 mbar pressure. We characterize the temperature dependent O4 line shape and provide high precision O4 absorption cross section reference spectra that are suitable for atmospheric O4 measurements. The peak absorption cross-section is found to increase at lower temperatures due to a corresponding narrowing of the spectral band width, while the integrated cross-section remains constant (within <3%, the uncertainty of our measurements). The enthalpy of formation is determined to be ΔH(250) = -0.12 ± 0.12 kJ mol(-1), which is essentially zero, and supports previous assignments of O4 as collision induced absorption (CIA). At 203 K, van der Waals complexes (O(2-dimer)) contribute less than 0.14% to the O4 absorption in air. We conclude that O(2-dimer) is not observable in the Earth atmosphere, and as a consequence the atmospheric O4 distribution is for all practical means and purposes independent of temperature, and can be predicted with an accuracy of better than 10(-3) from knowledge of the oxygen concentration profile.
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Cites
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The HITRAN2020 molecular spectroscopic database
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Exoplanet Biosignatures: Understanding Oxygen as a Biosignature in the Context of Its Environment
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Metadata
- Authors
- Thalman, R., & Volkamer, R.
- Venue
- Physical Chemistry Chemical Physics
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2013
- Volume
- 15
- Issue
- 37
- Pages
- 15371
- ISSN
- 1463-9076 (ISSN-L)
- 1463-9084
- OpenAlex
- W1992006743
- Cited by
- 434
- References
- 18
- FWCI
- 6.71
- Type
- journal article
- Language
- en
- Open access
- closed
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- Thalman, R., & Volkamer, R. (2013). Temperature dependent absorption cross-sections of O2–O2 collision pairs between 340 and 630 nm and at atmospherically relevant pressure. Physical Chemistry Chemical Physics. https://doi.org/10.1039/c3cp50968k
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