Impacts Into Titan's Methane‐Clathrate Crust as a Source of Atmospheric Methane Article Swipe
YOU?
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· 2025
· Open Access
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· DOI: https://doi.org/10.1029/2024je008624
Titan is the only icy satellite in the solar system with a dense atmosphere. This atmosphere is composed primarily of nitrogen with a few percent methane, which supports an active, methane‐based hydrological cycle on Titan. The presence of methane, however, is intriguing, as its lifetime is likely much shorter than the age of the solar system due to its irreversible destruction by UV photolysis. To explain Titan's current atmospheric methane abundance, it is hypothesized that a replenishment mechanism is needed. One such mechanism may be crater forming impacts; a methane‐clathrate layer potentially covering the surface of Titan may act as a reservoir that releases methane when disrupted by impacts. Here, we perform impact simulations into methane‐clathrate layers to investigate the amount of methane released via impacts. Our simulations show that the amount of methane released into the atmosphere depends on both the impactor size and the methane‐clathrate layer thickness. A single 20‐km‐diameter impactor releases up to 1% of Titan's current atmospheric methane mass; the effect of impact obliquity and surface porosity may further increase the released mass by a factor of 2–3. The release rate from impacts is lower than the net loss rate by photolysis, but the released methane mass via impacts can enhance the lifetime of methane in Titan's atmosphere by up to 3%. Menrva‐sized (400 km diameter) crater‐forming impacts directly liberate 15% of Titan's current atmospheric methane. The direct heating of the atmosphere by the impactor might contribute to additional crustal heating and methane release.
Related Topics
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1029/2024je008624
- https://onlinelibrary.wiley.com/doi/pdfdirect/10.1029/2024JE008624
- OA Status
- hybrid
- Cited By
- 1
- References
- 80
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4409241299
Raw OpenAlex JSON
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https://openalex.org/W4409241299Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1029/2024je008624Digital Object Identifier
- Title
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Impacts Into Titan's Methane‐Clathrate Crust as a Source of Atmospheric MethaneWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2025Year of publication
- Publication date
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2025-04-01Full publication date if available
- Authors
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Shigeru Wakita, Brandon Johnson, J. M. Soderblom, Jordan K. Steckloff, Alexandria V. Johnson, C. D. Neish, Jahnavi Shah, P. CorliesList of authors in order
- Landing page
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https://doi.org/10.1029/2024je008624Publisher landing page
- PDF URL
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https://onlinelibrary.wiley.com/doi/pdfdirect/10.1029/2024JE008624Direct link to full text PDF
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YesWhether a free full text is available
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hybridOpen access status per OpenAlex
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https://onlinelibrary.wiley.com/doi/pdfdirect/10.1029/2024JE008624Direct OA link when available
- Concepts
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Methane, Titan (rocket family), Astrobiology, Atmospheric methane, Clathrate hydrate, Crust, Methane gas, Earth science, Geology, Environmental science, Geochemistry, Chemistry, Physics, Hydrate, Organic chemistryTop concepts (fields/topics) attached by OpenAlex
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1Total citation count in OpenAlex
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2025: 1Per-year citation counts (last 5 years)
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80Number of works referenced by this work
- Related works (count)
-
10Other works algorithmically related by OpenAlex
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