Search Publications

Strong Depletion of ¹³C in CO Induced by Photolysis of CO₂ in the Martian Atmosphere, Calculated by a Photochemical Model

Aoki, Shohei; Yoshida, Nao; Terada, Naoki +7 more

The isotopic signature of atmospheric carbon offers a unique tracer for the history of the Martian atmosphere and the origin of organic matter on Mars. The photolysis of CO₂ is known to induce strong isotopic fractionation of the carbon between CO₂ and CO. However, its effects on the carbon isotopic compositions in the Martia…

Depletion of ¹³C in CO in the Atmosphere of Mars Suggested by ExoMars-TGO/NOMAD Observations

Aoki, S.; Vandaele, A. C.; Daerden, F. +19 more

The atmosphere of Mars is mainly composed by carbon dioxide (CO₂). It has been predicted that photodissociation of CO₂ depletes ¹³C in carbon monoxide (CO). We present the carbon ¹³C/¹²C isotopic ratio in CO at 30-50 km altitude from the analysis of the solar occultation measurements taken by …