Search Publications
Development and Evolution of Icy Layer Outcrops on Mars' North Polar Ice Cap: Observations of Vertical and Lateral Variability
Mustard, John F.; Becerra, Patricio; Bramson, Ali M. +1 more
Mars' north polar ice cap features troughs that cut into the ice, exposing subsurface layers of different brightness and topographic expression. Specifically, these layers represent two different stratum types: lower albedo (higher dust content) marker beds, which protrude out of the wall topographically, and higher albedo (i.e., icier) interbeds,…
Martian hydrosphere: A brief overview of water on Mars
Gopalchetty, Brahma
Understanding the status of water on Mars is crucial for evaluating its capacity to support life and to serve as a resource for future possible human exploration. Investigations have been carried out in the past to find signs of water in its past or present states. It is generally agreed that Mars had significant amounts of water early in its exis…
Mars ionosphere TEC estimation from MARSIS data: A new approach
Sánchez-Cano, B.; Orosei, R.; Cartacci, M. +3 more
We describe a new implementation of the Contrast Method (CM) algorithm (Picardi and Sorge, 2000; Ilyushin Ya and Kunitsyn, 2004; Cartacci et al., 2013) used to correct the phase distortion of the echoes recorded by the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) (Picardi et al., 2005; Jordan et al., 2009) in its subsurface …
Mars Express investigations of the Martian ionosphere using ASPERA-3 and new MARSIS fixed frequency modes
Barabash, Stas; Holmstrom, Mats; Sánchez-Cano, Beatriz +7 more
The plasma package Analyzer of Space Plasma and Energetic Atoms (ASPERA-3) onboard Mars Express has observed ions and electrons accelerated by the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) radar when it operates in its active ionospheric sounding mode. To better study the processes involved, new operational modes for MARS…
The effects of measured slope on Martian lava flow modeling
Russo, Frances P.; Flynn, Ian T. W.; Peters, Sean I. +1 more
One of the most frequently used methods for modeling lava flows on Mars is commonly called the "standard rheologic approach" (SRA). This method requires measurements of the flow dimensions (e.g., width, length, thickness) and local topography (e.g., slope), which are used in equations of viscosity and yield strength, for example. Topography is a c…
Temporal and spatial variation in subsurface cryosphere in East Coprates Planum, Mars
Dasgupta, Dipayan
There is general acceptance among researchers regarding the presence of a cryosphere in the subsurface of Mars. The two main geomorphic indications assumed to support the existence of this cryospheric layer are layered ejecta rampart craters and outflow channels. In essence, a layered ejecta rampart crater is a crater with an ejecta blanket having…
Effects of the September 2014 coronal mass ejection chain in the inner Solar System and the response of the Martian ionosphere
Sánchez-Cano, B.; Harada, Y.; Ippolito, A.
Context. During September 2014, intense solar activity led to a number of coronal mass ejections (CMEs) propagating in the heliosphere. The strong perturbation in the interplanetary magnetic field and the remarkable enhancements in the energetic particle fluxes accelerated by the shock waves associated with the CMEs affected the environments of th…
Relationships between lobate debris aprons and lineated valley fill on Mars: Evidence for an extensive Amazonian valley glacial landsystem in Mamers Valles
Head, James W.; Hiesinger, Harald; Jawin, Erica R. +3 more
We examine the characteristics and relationships of Lineated Valley Fill (LVF) and Lobate Debris Aprons (LDA) in Mamers Valles on Mars, a ∼950 km-long fretted valley at the dichotomy boundary. The relationships and distinctions between these glacial landforms are established by detailed analysis of LDA/LVF morphology, topography, and related featu…
Evidence for landslides in Sisyphi Cavi (Noachis Terra, Mars): Slope evolution and role of endogenous preparatory factors
Komatsu, Goro; Discenza, Marco Emanuele; Esposito, Carlo +4 more
The surface of Mars is characterized by the presence of numerous gravity-induced processes and mass movements with greatly variable sizes and peculiarities. Detailed geomorphological studies have recently made it possible to identify many landslide-like landforms along the slopes bordering pits of Sisyphi Cavi in Noachis Terra, the southern hemisp…
Seasonal and Short Timescale Changes on the Martian Surface: Multi-Spacecraft Perspectives
Thomas, N.; Schmidt, F.; Tirsch, D. +7 more
The continued operation of missions such as Mars Express, Mars Reconnaissance Orbiter, and the ExoMars Trace Gas Orbiter has greatly enhanced our knowledge of seasonal processes on Mars. The most apparent evidence of the importance of seasons on Mars on the large scale is annual variation in the sizes of the Martian polar caps. However, high resol…