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The search for ephemeral liquid water on Mars is an ongoing activity. After the recession of the seasonal polar ice cap on Mars, small water ice patches may be left behind in shady places due to the low thermal conductivity of the Martian…

Earth and Planetary Astrophysics · Physics 2023-09-12 Mira Gergácz , Ákos Kereszturi

On Mars it is possible that after the recession of the seasonal polar ice cap, small icy patches left behind in shady places due to the low thermal conductivity of the Martian surface and atmosphere, are met by direct sunlight during the…

Earth and Planetary Astrophysics · Physics 2023-06-08 Mira A. Gergácz , Ákos Kereszturi

Dark deposits visible from orbit appear in the Martian south polar region during the springtime. These are thought to form from explosive jets of carbon dioxide gas breaking through the thawing seasonal ice cap, carrying dust and dirt which…

Earth and Planetary Astrophysics · Physics 2022-11-30 Mark D. McDonnell , Eriita Jones , Megan E. Schwamb , K-Michael Aye , Ganna Portyankina , Candice J. Hansen

We report on mapping of the north polar region of Mars using data from the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) instrument. We have observed three Mars Years (28-30) of late-winter and spring recessions…

Earth and Planetary Astrophysics · Physics 2014-03-14 Adrian J. Brown , Wendy M. Calvin , Scott L. Murchie

In this paper, we analyze water ice occurrences at the surface of Mars using near-infrared observations, and we study their distribution with a climate model. Latitudes between 45{\deg}S and 50{\deg}N are considered. Data from the…

Earth and Planetary Astrophysics · Physics 2015-05-27 Mathieu Vincendon , François Forget , John Mustard

We report on mapping of the south polar region of Mars using data from the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) instrument. Our observations have led to the following discoveries: 1. Water ice is present in the form…

Earth and Planetary Astrophysics · Physics 2014-02-05 Adrian J. Brown , Wendy M. Calvin , Patrick C. McGuire , Scott L. Murchie

One of the main objectives of the Mars Exploration Program is to search for evidence of past or current life on the planet. To achieve this, Mars exploration has been focusing on regions that may have liquid or frozen water. A set of…

Earth and Planetary Astrophysics · Physics 2024-08-12 Kyle A. Pearson , Eldar Noe , Daniel Zhao , Alphan Altinok , Alex Morgan

HiRISE (High-Resolution Imaging Science Experiment) is a camera onboard the Mars Reconnaissance orbiter responsible for photographing vast areas of the Martian surface in unprecedented detail. It can capture millions of incredible closeup…

Computer Vision and Pattern Recognition · Computer Science 2024-05-09 Kunal Sunil Kasodekar

In this study we assess the presence, nature and properties of ices - in particular water ice - that occur within these spots using HIRISE and CRISM observations, as well as the LMD Global Climate Model. Our studies focus on Richardson…

Geophysics · Physics 2015-05-20 A. Kereszturi , M. Vincendon , F. Schmidt

A key outstanding question in Martian science is 'are the polar caps gaining or losing mass and what are the implications for past, current and future climate?' To address this question, we use observations from the Compact Reconnaissance…

Earth and Planetary Astrophysics · Physics 2016-07-06 Adrian J. Brown , Wendy M. Calvin , Patricio Becerra , Shane Byrne

Condensation and sublimation of ices at the surface of the planet is a key part of both the Martian H$_2$O and CO$_2$ cycles, either from a seasonal or diurnal aspect. While most of the ice is located within the polar caps, surface frost is…

The Martian climate is governed by an annual cycle, that results in the condensation of CO$_{2}$ ice during winter, up to a meter thick at the pole and thousands of kilometers in extension. Water and dust may be trapped during the…

Earth and Planetary Astrophysics · Physics 2018-08-15 François Andrieu , Frédéric Schmidt , Sylvain Douté , Eric Chassefière

The current inventory of recent (fresh) impacts on Mars shows a strong bias towards areas of low thermal inertia. These areas are generally visually bright, and impacts create dark scours and rays that make them easier to detect. It is…

We use observations from the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) of the north polar cap during late summer for two Martian years, to monitor the complete summer cycle of albedo and water ice grain size in order to…

Earth and Planetary Astrophysics · Physics 2015-01-12 Adrian J. Brown , Wendy M. Calvin , Patricio Becerra , Shane Byrne

Observations of the South Polar Residual Cap suggest a possible erosion of the cap, leading to an increase of the global mass of the atmosphere. We test this assumption by making the first comparison between Viking 1 and InSight surface…

Earth and Planetary Astrophysics · Physics 2022-09-28 L. Lange , F. Forget , D. Banfield , M. Wolff , A. Spiga , E. Millour , D. Viúdez-Moreiras , A. Bierjon , S. Piqueux , C. Newman , J. Pla-García , W. B. Banerdt

Seasonal frosting and defrosting on the surface of Mars is hypothesized to drive both climate processes and the formation and evolution of geomorphological features such as gullies. Past studies have focused on manually analyzing the…

Computer Vision and Pattern Recognition · Computer Science 2024-03-20 Gary Doran , Serina Diniega , Steven Lu , Mark Wronkiewicz , Kiri L. Wagstaff

The precise tracking and prediction of polar ice layers can unveil historic trends in snow accumulation. In recent years, airborne radar sensors, such as the Snow Radar, have been shown to be able to measure these internal ice layers over…

Machine Learning · Computer Science 2023-06-26 Benjamin Zalatan , Maryam Rahnemoonfar

Using the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM), we map the temporal variability of water ice absorption bands over the near-polar ice mound in Louth crater, Mars. The absorption band depth of water ice at 1.5 microns…

Earth and Planetary Astrophysics · Physics 2017-11-20 Adrian J. Brown , Jonathan Bapst , Shane Byrne

The spectral signature of water ice was observed on Martian south polar cap in 2004 by the Observatoire pour l'Mineralogie, l'Eau les Glaces et l'Activite (OMEGA) (Bibring et al., 2004). Three years later, the OMEGA instrument was used to…

Earth and Planetary Astrophysics · Physics 2015-06-22 Adrian J. Brown , Sylvain Piqueux , Timothy N. Titus

The springtime sublimation process of Mars' southern seasonal polar CO$_2$ ice cap features dark fan-shaped deposits appearing on the top of the thawing ice sheet. The fan material likely originates from the surface below the ice sheet,…

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