# Montmessin 2021: A stringent upper limit of 20 pptv for methane on Mars and constraints on its dispersion outside Gale crater

> F. Montmessin, O. I. Korablev, A. Trokhimovskiy et al., 2021. 6 records on Mysteries Department cite it. The strongest orbital limit.

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[Sources](https://mysteriesdept.com/sources)[Mars methane puzzle](https://mysteriesdept.com/mysteries/mars-methane)Montmessin 2021

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# A stringent upper limit of 20 pptv for methane on Mars and constraints on its dispersion outside Gale crater

F. Montmessin, O. I. Korablev, A. Trokhimovskiy et al., 2021. _Astronomy & Astrophysics 650, A140_.

640 ACS solar occultations over 1.44 Mars years: no methane, with 1-sigma limits of about 10 pptv in clear northern summer and an annual mean of the smallest limits of 20 pptv. Near Gale, limits are up to four times below Curiosity's background for the same season.

**Mars methane puzzle** Articledoi: **[10.1051/0004-6361/202140389](https://doi.org/10.1051/0004-6361/202140389)** Checked against the original0

## What it's used for here

The strongest orbital limit.

## Cited by on this site 6 records

[ExoMars Trace Gas Orbiter solar-occultation spectra (ACS and NOMAD)](https://mysteriesdept.com/mysteries/mars-methane/artifacts/ART0D7EYA5A2BZF/exomars-trace-gas-orbiter-solar-occultation-spectra-acs-and)

ART

[The orbiter's limits near Gale are up to four times below the rover's background for the same season.](https://mysteriesdept.com/mysteries/mars-methane/evidence/EVD0D7EY0500VW6/the-orbiters-limits-near-gale-are-up-to-four-times-below-the)

Evidence

EVD

[ACS sets a 20 pptv limit from 1.44 Mars years](https://mysteriesdept.com/mysteries/mars-methane/events/EVT0D7EXW801RFG/acs-sets-a-20-pptv-limit-from-1-44-mars-years)

EVT

[The Mars methane puzzle](https://mysteriesdept.com/mysteries/mars-methane)

The mystery article

MYS

[If the rover is right, why does the orbiter see no methane?](https://mysteriesdept.com/mysteries/mars-methane/questions/QST0D7EXWZE752X/if-the-rover-is-right-why-does-the-orbiter-see-no-methane)

Question

QST

[Is there methane in the air at Gale crater?](https://mysteriesdept.com/mysteries/mars-methane/questions/QST0D7EXWQM6TWB/is-there-methane-in-the-air-at-gale-crater)

Question

QST

## Cite it

```
Montmessin, F., Korablev, O. I., Trokhimovskiy, A., Lefèvre, F., Fedorova, A. A., & et al. (2021). A stringent upper limit of 20 pptv for methane on Mars and constraints on its dispersion outside Gale crater. Astronomy & Astrophysics 650, A140. https://doi.org/10.1051/0004-6361/202140389
```

[Read it free at doi.org](https://doi.org/10.1051/0004-6361/202140389)

Key

**SRC** 0D7EXPCG3CNM

Kind

Journal article

Rights

CC-BY-4.0

Checked

Against the published article

Added by

[apollo](https://mysteriesdept.com/u/apollo)

The record

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