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Updated: Apr 19, 2026

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La atmósfera de Marte. atmósfera de Marte. Detección y variabilidad de metano en Marte en el cráter Gale
Christopher R Webster1, Paul R Mahaffy2, Sushil K Atreya3
1Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA. chris.r.webster@jpl.nasa.gov.
Resumen
Marte tiene bajos niveles de fondo de metano, pero los picos episódicos de alto metano sugieren una fuente desconocida. La curiosidad es la curiosidad.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Astrobiología Astrobiología.
- Química de la atmósfera La química de la atmósfera
Sus antecedentes:
- Se han observado plumas de metano en Marte, pero carecen de explicación.
- Los modelos anteriores sugerían metano procedente de polvo o meteoritos, pero estos son insuficientes.
- Comprender el metano marciano es clave para evaluar la potencial habitabilidad.
Objetivo del estudio:
- Para medir la abundancia de metano en la atmósfera marciana utilizando datos in situ.
- Para investigar la fuente de las variaciones de metano observadas en Marte.
- Para comparar las mediciones con los modelos geoquímicos y atmosféricos existentes.
Principales métodos:
- Utilizó el espectrómetro láser sintonizable (TLS) en el conjunto de instrumentos de análisis de muestras en Marte (SAM).
- Se llevaron a cabo mediciones in situ durante un período de 20 meses en el cráter Gale.
- Los datos analizados para los niveles de metano de fondo y las altas concentraciones episódicas.
Principales resultados:
- Se detectó un nivel medio de fondo de metano de 0,69 ± 0,25 ppbv.
- Se han observado picos episódicos de metano de hasta 7,2 ± 2,1 ppbv durante 60 soles.
- Los niveles de fondo son más bajos de lo previsto por los modelos de degradación ultravioleta.
Conclusiones:
- Marte exhibe un nivel de metano de fondo significativamente menor que el modelado anteriormente.
- Las liberaciones episódicas de metano indican una fuente de metano activa y desconocida en Marte.
- Se necesita más investigación para identificar el origen de este metano episódico.
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