# Webster 2021: Day-night differences in Mars methane suggest nighttime containment at Gale crater

> Christopher R. Webster, Paul R. Mahaffy, Jorge Pla-Garcia et al., 2021. 6 records on Mysteries Department cite it. The day-night test and the largest…

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

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# Day-night differences in Mars methane suggest nighttime containment at Gale crater

Christopher R. Webster, Paul R. Mahaffy, Jorge Pla-Garcia et al., 2021. _Astronomy & Astrophysics 650, A166_.

Two daytime TLS measurements average 0.05 ± 0.22 ppbv against 0.52 ± 0.10 ppbv at night in the same season, supporting night-time containment and daytime dilution; reports a spike of 20.5 ± 4 ppbv in June 2019 and argues that widespread seepage would need fast destruction or sequestration.

**Mars methane puzzle** Articledoi: **[10.1051/0004-6361/202040030](https://doi.org/10.1051/0004-6361/202040030)** Checked against the original0

## What it's used for here

The day-night test and the largest reported spike.

## Cited by on this site 6 records

[A strong day-night difference is not an obvious product of a leak.](https://mysteriesdept.com/mysteries/mars-methane/evidence/EVD0D7EY0CT140X/a-strong-day-night-difference-is-not-an-obvious-product-of-a)

Evidence

EVD

[Night-time values of 0.52 ± 0.10 ppbv against daytime 0.05 ± 0.22 ppbv in the same season.](https://mysteriesdept.com/mysteries/mars-methane/evidence/EVD0D7EXYEA5KCC/night-time-values-of-0-52-0-10-ppbv-against-daytime-0-05-0)

Evidence

EVD

[The day-night difference measured in 2019 fits night-time containment.](https://mysteriesdept.com/mysteries/mars-methane/evidence/EVD0D7EY1481209/the-day-night-difference-measured-in-2019-fits-night-time)

Evidence

EVD

[Curiosity records 20.5 ppbv methane](https://mysteriesdept.com/mysteries/mars-methane/events/EVT0D7EXW061YSY/curiosity-records-20-5-ppbv-methane)

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

## Cite it

```
Webster, C. R., Mahaffy, P. R., Pla-Garcia, J., Rafkin, S. C. R., Moores, J. E., & et al. (2021). Day-night differences in Mars methane suggest nighttime containment at Gale crater. Astronomy & Astrophysics 650, A166. https://doi.org/10.1051/0004-6361/202040030
```

[Read it free at doi.org](https://doi.org/10.1051/0004-6361/202040030)

Key

**SRC** 0D7EXP4P2XCB

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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