Numerical simulations of radar echoes rule out basal CO2 ice deposits at Ultimi Scopuli, Mars

Article


Orosei, Roberto, Caprarelli, Graziella, Lauro, Sebastian, Pettinelli, Elena, Cartacci, Marco, Cicchetti, Andrea, Cosciotti, Barbara, De Lorenzis, Alessandro, De Nunzio, Giorgio, Mattei, Elisabetta, Nenna, Carlo, Noschese, Raffaella and Soldovieri, Francesco. 2022. "Numerical simulations of radar echoes rule out basal CO2 ice deposits at Ultimi Scopuli, Mars." Icarus. 386. https://doi.org/10.1016/j.icarus.2022.115163
Article Title

Numerical simulations of radar echoes rule out basal CO2 ice deposits at Ultimi Scopuli, Mars

ERA Journal ID1066
Article CategoryArticle
AuthorsOrosei, Roberto, Caprarelli, Graziella, Lauro, Sebastian, Pettinelli, Elena, Cartacci, Marco, Cicchetti, Andrea, Cosciotti, Barbara, De Lorenzis, Alessandro, De Nunzio, Giorgio, Mattei, Elisabetta, Nenna, Carlo, Noschese, Raffaella and Soldovieri, Francesco
Journal TitleIcarus
Journal Citation386
Article Number115163
Number of Pages13
Year2022
PublisherElsevier
Place of PublicationUnited States
ISSN0019-1035
1090-2643
Digital Object Identifier (DOI)https://doi.org/10.1016/j.icarus.2022.115163
Web Address (URL)https://www.sciencedirect.com/science/article/pii/S0019103522002652
Abstract

The principal objective of the radar sounder MARSIS experiment is to look for ice and water in the Martian subsurface. One particular focus of investigations, since 2005, has been the search for basal liquid water in the south polar layered deposits (SPLD). Anomalously strong basal echoes detected from four distinct areas at the base of the deposits at Ultimi Scopuli have been interpreted to indicate the presence of bodies of liquid water in this location, beneath a 1.5 km thick cover of ice and dust. Other explanations for the bright basal reflections have been proposed, however, including the possibility of constructive interference in layered media. Here, we test this mechanism through simulations of MARSIS radar signals propagating in models of CO2-H2O ice sequences. We then compare the results to real MARSIS data acquired over Ultimi Scopuli, finding that no CO2-H2O ice model sequence reproduces the set of real data. The results of our work have implications in relation to the global CO2 inventory of Mars.

KeywordsSPLD; Mars; MARSIS; CO2 ice ; Radar
Public Notes

Files associated with this item cannot be displayed due to copyright restrictions.

Byline AffiliationsNational Institute for Astrophysics, Italy
Centre for Astrophysics (Research)
Centre for Astrophysics
Third University of Rome, Italy
Euro-Mediterranean Center on Climate Change (CMCC), Italy
University of Salento, Italy
Institute for Electromagnetic Sensing of the Environment (IREA), Italy
Permalink -

https://research.usq.edu.au/item/z0286/numerical-simulations-of-radar-echoes-rule-out-basal-co2-ice-deposits-at-ultimi-scopuli-mars

  • 15
    total views
  • 1
    total downloads
  • 1
    views this month
  • 0
    downloads this month

Export as

Related outputs

Reply to: Explaining bright radar reflections below the south pole of Mars without liquid water
Lauro, Sebastian Emanuel, Pettinelli, Elena, Caprarelli, Graziella, Guallini, Luca, Rossi, Angelo Pio, Mattei, Elisabetta, Cosciotti, Barbara, Cicchetti, Andrea, Soldovieri, Francesco, Cartacci, M., Di Paolo, F., Noschese, R. and Orosei, R.. 2023. "Reply to: Explaining bright radar reflections below the south pole of Mars without liquid water." Nature Astronomy. 7 (3), pp. 259-261. https://doi.org/10.1038/s41550-022-01871-0
Fire in the Earth System: Introduction to the Special Collection
East, Amy, AghaKouchak, Amir, Caprarelli, Graziella, Filippelli, Gabriel, Florindo, Fabio, Luce, Charles, Rajaram, Harihar, Russell, Lynn, Santin, Cristina and Santos, Isaac. 2023. "Fire in the Earth System: Introduction to the Special Collection." Journal of Geophysical Research: Earth Surface. 128 (4). https://doi.org/10.1029/2023JF007184
Can Clay Mimic the High Reflectivity of Briny Water Below the Martian SPLD?
Cosciotti, Barbara, Mattei, Elisabetta, Brin, Alessandro, Lauro, Sebastian Emanuel, Stillman, David E., Cunje, Alister, Hickson, Dylan, Caprarelli, Graziella and Pettinelli, Elena. 2023. "Can Clay Mimic the High Reflectivity of Briny Water Below the Martian SPLD?" Journal of Geophysical Research: Planets. 128 (3). https://doi.org/10.1029/2022JE007513
Multiple subglacial water bodies below the south pole of Mars unveiled by new MARSIS data
Lauro, Sebastian Emanuel, Pettinelli, Elena, Caprarelli, Graziella, Guallini, Luca, Rossi, Angelo Pio, Mattei, Elisabetta, Cosciotti, Barbara, Cicchetti, Andrea, Soldovieri, Francesco, Cartacci, Marco, Di Paolo, Federico, Noschese, Raffaella and Orosei, Roberto. 2021. "Multiple subglacial water bodies below the south pole of Mars unveiled by new MARSIS data." Nature Astronomy. 5, pp. 63-70. https://doi.org/10.1038/s41550-020-1200-6
Lunar polar water resource exploration – Examination of the lunar cold trap reservoir system model and introduction of play-based exploration (PBE) techniques
Casanova, Sophia, Espejel, Carlos, Dempster, Andrew G., Anderson, Robert C., Caprarelli, Graziella and Saydam, Serkan. 2020. "Lunar polar water resource exploration – Examination of the lunar cold trap reservoir system model and introduction of play-based exploration (PBE) techniques." Planetary and Space Science. 180, pp. 1-10. https://doi.org/10.1016/j.pss.2019.104742
Partially-Saturated Brines Within Basal Ice or Sediments Can Explain the Bright Basal Reflections in the South Polar Layered Deposits
Stillman, D. E., Pettinelli, E., Lauro, S. E., Mattei, E., Caprarelli, G., Cosciotti, B., Primm, K. M. and Orosei, R.. 2022. "Partially-Saturated Brines Within Basal Ice or Sediments Can Explain the Bright Basal Reflections in the South Polar Layered Deposits." Journal of Geophysical Research: Planets. 127 (10). https://doi.org/10.1029/2022JE007398
Assessing the role of clay and salts on the origin of MARSIS basal bright reflections
Mattei, Elisabetta, Pettinelli, Elena, Lauro, Sebastian Emanue, Stillman, David E., Cosciotti, Barbara, Marinangeli, Lucia, Tangari, Anna Chiara, Soldovieri, Francesco, Orosei, Roberto and Caprarelli, Graziella. 2022. "Assessing the role of clay and salts on the origin of MARSIS basal bright reflections." Earth and Planetary Science Letters. 579. https://doi.org/10.1016/j.epsl.2022.117370
Using MARSIS signal attenuation to assess the presence of South Polar Layered Deposit subglacial brines
Lauro, Sebastian E., Pettinelli, Elena, Caprarelli, Graziella, Baniamerian, Jamaledin, Mattei, Elisabetta, Cosciotti, Barbara, Stillman, David E., Primm, Katherine M., Soldovieri, Francesco and Orosei, Roberto. 2022. "Using MARSIS signal attenuation to assess the presence of South Polar Layered Deposit subglacial brines." Nature Communications. 13 (1). https://doi.org/10.1038/s41467-022-33389-4
Thank You to Our 2021 Reviewers
Caprarelli, Graziella, Altintas, Ilkay, Baratoux, David, Cervato, Cinzia, Diviacco, Paolo, Donea, Alina, Donnellan, Andrea, Gentemann, Chelle, Glaves, Helen M., Jiang, Jonathan H., Jones, Cathleen E., Maute, Astrid, Pirenne, Benoit, Pryor, Sara C., Tiampo, Kristy and Xie, Zunyi. 2022. "Thank You to Our 2021 Reviewers." Earth and Space Science. 9 (4). https://doi.org/10.1029/2022EA002372