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http://hdl.handle.net/20.500.12386/28340| Title: | Radar evidence of subglacial liquid water on Mars | Authors: | OROSEI, ROBERTO Lauro, S. E. Pettinelli, E. CICCHETTI, ANDREA Coradini, M. Cosciotti, B. Di Paolo, F. Flamini, E. Mattei, E. PAJOLA, MAURIZIO Soldovieri, F. CARTACCI, MARCO Cassenti, F. FRIGERI, ALESSANDRO GIUPPI, Stefano Martufi, R. Masdea, A. Mitri, G. Nenna, C. NOSCHESE, RAFFAELLA Restano, M. Seu, R. |
Issue Date: | 2018 | Journal: | SCIENCE | Number: | 361 | Issue: | 6401 | First Page: | 490 | Abstract: | The presence of liquid water at the base of the martian polar caps has long been suspected but not observed. We surveyed the Planum Australe region using the MARSIS (Mars Advanced Radar for Subsurface and Ionosphere Sounding) instrument, a low-frequency radar on the Mars Express spacecraft. Radar profiles collected between May 2012 and December 2015 contain evidence of liquid water trapped below the ice of the South Polar Layered Deposits. Anomalously bright subsurface reflections are evident within a well-defined, 20-kilometer-wide zone centered at 193°E, 81°S, which is surrounded by much less reflective areas. Quantitative analysis of the radar signals shows that this bright feature has high relative dielectric permittivity (>15), matching that of water-bearing materials. We interpret this feature as a stable body of liquid water on Mars. | Note: | https://www.altmetric.com/details/45519784 In the top 5% of all research outputs scored by Altmetric Among the highest-scoring outputs from this source (#29 of 68,244) High Attention Score compared to outputs of the same age (99th percentile) High Attention Score compared to outputs of the same age and source (99th percentile) | URI: | http://hdl.handle.net/20.500.12386/28340 | URL: | https://arxiv.org/abs/2004.04587 https://science.sciencemag.org/content/361/6401/490 |
ISSN: | 0036-8075 | DOI: | 10.1126/science.aar7268 | Bibcode ADS: | 2018Sci...361..490O | Fulltext: | open |
| Appears in Collections: | 1.01 Articoli in rivista |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| aar7268_Merged_final.pdf | preprint | 1.86 MB | Adobe PDF | View/Open |
| Science490.full.pdf | [Administrators only] | 998.48 kB | Adobe PDF |
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