ArticleNational science review2025
Seismic evidence of liquid water at the base of Mars' upper crust.
Article in National science review, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
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Who cites it
2 citing papers in PubMed.
- Subsurface Life on Earth as a Key to Unlock Extraterrestrial Mysteries.Microbial biotechnology · 2025Review
- Reply to Xiao et al.: A wet or dry Martian mid-crust, that is only part of the question.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Liquid water was abundant on Mars during the Noachian and Hesperian periods but vanished as the planet transitioned into the cold, dry environment we see today. It is hypothesized that much of this water was either lost to space or stored in the crust. However, the extent of the water reservoir within the crust remains poorly constrained due to a lack of observational evidence. Here, we invert the shear wave velocity structure of the upper crust, identifying a significant low-velocity layer at the base, between depths of 5.4 and 8 km. This zone is interpreted as a high-porosity, water-saturated layer, and is estimated to hold a liquid water volume of 520-780 m of global equivalent layer (GEL). This estimate aligns well with the remaining liquid water volume of 710-920 m GEL, after accounting for water loss to space, crustal hydration and modern water inventory.
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