An analysis of Δ36S/Δ33S dependence on definitions of sulfur mass-independent fractionation

Endo, Yoshiaki; Chen, Mimi; Claire, Mark W.

doi:10.1016/j.chemgeo.2024.122157

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2024

2025

Publication Types

Select...

Book1

Article1

Relationship

Self Cite0

Independent2

Authors

Journals

Cited by 2 publications

References 125 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Mass-independent fractionation processes in the atmosphere

Hemingway,

Claire

2025

Treatise on Geochemistry

View full text Add to dashboard Cite

Mass-independent fractionation processes in the atmosphere

Hemingway,

Claire

2025

Treatise on Geochemistry

View full text Add to dashboard Cite

High-Resolution UV Absorption Cross-Section Measurements of ³²S, ³³S, ³⁴S, and ³⁶S Sulfur Dioxide for the B~1B1−X~1A1 Absorption Band

Li,

Danielache,

Endo

et al. 2024

ACS Earth Space Chem.

View full text Add to dashboard Cite

We report newly measured high-resolution and high-precision ultraviolet absorption cross-sections of 32 SO 2 , 33 SO 2 , 34 SO 2 , and 36 SO 2 for the B B X A1 1 1 1 band over the wavelength range of 240 to 320 nm at a resolution of 0.4 cm −1 . The resolution was improved 20 times compared to that in a previous study. A least absolute deviation linear regression method was applied to calculate cross-sections and derived spectral errors from a set of measurements recorded at a wide range of pressures to ensure the optimal signal-to-noise ratio at all wavelengths. Based on this analysis, error bars on the measured cross-sections ranged between 3 and 10%. The overall features of measured crosssections, such as peak positions of the isotopologues, are consistent with previous studies. We provide improved spectral data for studying sulfur mass-independent fraction (S-MIF) signatures during SO 2 photoexcitation. Our spectral measurements predict that SO 2 photoexcitation produces S-MIF enrichment factors 33 E = − 0.9 ± 0.2‰ and 36 E = − 3.8 ± 0.4‰ (where 33 E and 36 E are 1000 × [ln( 33 J/ 32 J) − 0.515 ln( 34 J/ 32 J)] ‰ and 1000 × [ln( 36 J/ 32 J) − 1.90 ln( 34 J/ 32 J] ‰, and 3x J is the 3x SO 2 photoexcitation rate constant). Based on this new result, we found that calculated SO 2 photoexcitation isotope effects are smaller than previously thought and generally do not match photoexcitation experimental observations supporting the hypothesis of an intersystem crossing origin of MIF on those experiments.

show abstract

An analysis of Δ36S/Δ33S dependence on definitions of sulfur mass-independent fractionation

Cited by 2 publications

References 125 publications

Mass-independent fractionation processes in the atmosphere

Mass-independent fractionation processes in the atmosphere

High-Resolution UV Absorption Cross-Section Measurements of ³²S, ³³S, ³⁴S, and ³⁶S Sulfur Dioxide for the B~1B1−X~1A1 Absorption Band

Contact Info

Product

Resources

About

An analysis of Δ36S/Δ33S dependence on definitions of sulfur mass-independent fractionation

Cited by 2 publications

References 125 publications

Mass-independent fractionation processes in the atmosphere

Mass-independent fractionation processes in the atmosphere

High-Resolution UV Absorption Cross-Section Measurements of 32S, 33S, 34S, and 36S Sulfur Dioxide for the B~1B1−X~1A1 Absorption Band

Contact Info

Product

Resources

About

High-Resolution UV Absorption Cross-Section Measurements of ³²S, ³³S, ³⁴S, and ³⁶S Sulfur Dioxide for the B~1B1−X~1A1 Absorption Band