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Date |
2018-06-08 |
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Is Part Of |
p10959203 |
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Is Part Of |
repository |
| 55406 |
abstract |
Variable levels of methane in the martian atmosphere have eluded explanation partly
because the measurements are not repeatable in time or location. We report in situ
measurements at Gale crater made over a 5-year period by the Tunable Laser Spectrometer
on the Curiosity rover. The background levels of methane have a mean value 0.41 ±
0.16 parts per billion by volume (ppbv) (95% confidence interval) and exhibit a strong,
repeatable seasonal variation (0.24 to 0.65 ppbv). This variation is greater than
that predicted from either ultraviolet degradation of impact-delivered organics on
the surface or from the annual surface pressure cycle. The large seasonal variation
in the background and occurrences of higher temporary spikes (~7 ppbv) are consistent
with small localized sources of methane released from martian surface or subsurface
reservoirs. |
| 55406 |
authorList |
authors |
| 55406 |
issue |
6393 |
| 55406 |
status |
peerReviewed |
| 55406 |
volume |
360 |
| 55406 |
type |
AcademicArticle |
| 55406 |
type |
Article |
| 55406 |
label |
Webster, Christopher R.; Mahaffy, Paul R.; Atreya, Sushil K.; Moores, John E.; Flesch,
Gregory J.; Malespin, Charles; McKay, Christopher P.; Martinez, German; Smith, Christina
L.; Martin-Torres, Javier; Gomez-Elvira, Javier; Zorzano, Maria-Paz; Wong, Michael
H.; Trainer, Melissa G.; Steele, Andrew; Archer, Doug; Sutter, Brad; Coll, Patrice
J.; Freissinet, Caroline; Meslin, Pierre-Yves; Gough, Raina V.; House, Christopher
H.; Pavlov, Alexander; Eigenbrode, Jennifer L.; Glavin, Daniel P.; Pearson, John C.;
Keymeulen, Didier; Christensen, Lance E.; Schwenzer, Susanne P. ; Navarro-Gonzalez,
Rafael; Pla-García, Jorge; Rafkin, Scot C. R.; Vicente-Retortillo, Álvaro; Kahanpää,
Henrik; Viudez-Moreiras, Daniel; Smith, Michael D.; Harri, Ari-Matti; Genzer, Maria;
Hassler, Donald M.; Lemmon, Mark; Crisp, Joy; Sander, Stanley P.; Zurek, Richard W.
and Vasavada, Ashwin R. (2018). Background levels of methane in Mars’ atmosphere
show strong seasonal variations. Science, 360(6393) pp. 1093–1096. |
| 55406 |
label |
Webster, Christopher R.; Mahaffy, Paul R.; Atreya, Sushil K.; Moores, John E.;
Flesch, Gregory J.; Malespin, Charles; McKay, Christopher P.; Martinez, German; Smith,
Christina L.; Martin-Torres, Javier; Gomez-Elvira, Javier; Zorzano, Maria-Paz; Wong,
Michael H.; Trainer, Melissa G.; Steele, Andrew; Archer, Doug; Sutter, Brad; Coll,
Patrice J.; Freissinet, Caroline; Meslin, Pierre-Yves; Gough, Raina V.; House, Christopher
H.; Pavlov, Alexander; Eigenbrode, Jennifer L.; Glavin, Daniel P.; Pearson, John C.;
Keymeulen, Didier; Christensen, Lance E.; Schwenzer, Susanne P. ; Navarro-Gonzalez,
Rafael; Pla-García, Jorge; Rafkin, Scot C. R.; Vicente-Retortillo, Álvaro; Kahanpää,
Henrik; Viudez-Moreiras, Daniel; Smith, Michael D.; Harri, Ari-Matti; Genzer, Maria;
Hassler, Donald M.; Lemmon, Mark; Crisp, Joy; Sander, Stanley P.; Zurek, Richard W.
and Vasavada, Ashwin R. (2018). Background levels of methane in Mars’ atmosphere
show strong seasonal variations. Science, 360(6393) pp. 1093–1096. |
| 55406 |
Title |
Background levels of methane in Mars’ atmosphere show strong seasonal variations |
| 55406 |
in dataset |
oro |