Explanipedia

Early thinning, late persistence, diachronous boundaries, and a regional dichotomy in Mars' young sedimentary rocks Open

Madison Turner, Sabrina Y. Khan, K. W. Lewis, Axel Noblet, Edwin S. Kite · 2025

Mars' sedimentary rocks record Gyrs of environmental change. New data enable global analyses of paleo-environment relevant physical properties of these rocks, including layer thickness and accumulation rate. Here, using plane-fitting techn…

VIPER Site Analysis Open

R. A. Beyer, M. Shirley, A. Colaprete, C. I. Fassett, Benjamin Fernando , et al. · 2025

We needed to evaluate available orbital data of NASA’s Volatiles Investigating Polar Exploration Rover (VIPER) mission area in order to derive a variety of maps to help the science team identify scientifically interesting places for the ro…

Maximum-likelihood estimation of the Matérn covariance structure of isotropic spatial random fields on finite, sampled grids Open

Frederik J. Simons, Olivia L. Walbert, Arthur P. Guillaumin, G. L. Eggers, K. W. Lewis , et al. · 2025

We present a statistically and computationally efficient spectral-domain maximum-likelihood procedure to solve for the structure of Gaussian spatial random fields within the Matern covariance hyperclass. For univariate, stationary, and iso…

Surface Dust Coverages on Rock Targets in Gale Crater: Influence of Elevation, Proximity to Aeolian Sand Fields and Seasonality Open

T. L. J. Henley, M. E. Schmidt, K. W. Lewis, John E. Moores, Conor Hayes , et al. · 2025

Martian dust is mobilized throughout the year by local, regional, and global dust storms, influencing atmospheric opacity and inhibiting observations of the surface. Using Mars Hand Lens Imager (MAHLI) images and methods of Schmidt et al. …

Hypotheses for the water and metal fluxes to the rippled Amapari Marker Band, Gale Crater, Mars Open

Edwin S. Kite, P. J. Gasda, Christopher Tino, C. M. Weitz, L. Thompson , et al. · 2025

DEPOSITIONAL ENVIRONMENT AND PALEOCLIMATE IMPLICATIONS OF THE AMAPARI MARKER BAND WAVE RIPPLES Open

Claire A. Mondro, J. P. Grotzinger, Christopher M. Fedo, Michael P. Lamb, Sanjeev Gupta , et al. · 2025

International audience

Mars' Young Sedimentary Rocks: Early thinning, late persistence, diachronous boundaries, and a regional dichotomy Open

Madison L. Turner, Sabrina Y. Khan, K. W. Lewis, Axel Noblet, Edwin S. Kite · 2025

Mars' sedimentary rocks record Gyrs of environmental change. New data enable the first global analysis of paleo-environment relevant physical properties of these rocks, including layer thickness and accumulation rate. We find that layer th…

Dielectric and Polarimetric Radar Properties of Suspected Surficial Ice Exposures at the Lunar South Pole Open

Tanish Himani, K. W. Lewis, G. W. Patterson, E. G. Rivera‐Valentín, Shashwat Shukla , et al. · 2025

Various active and passive orbital measurements have provided evidence for surficial water ice within some lunar permanently shadowed regions (PSRs), especially from near-infrared observations by the M 3 instrument. However, radar identifi…

Depositional Environment of the Amapari Marker Band: Rising Water Levels Formed Kilometer‐Scale Lake in Gale Crater, Mars Open

Claire A. Mondro, J. Grotzinger, Christopher M. Fedo, Michael P. Lamb, Sanjeev Gupta , et al. · 2025

The Amapari Marker Band (AMB) is a layer within the Mount Sharp stratigraphy that has been mapped around the Gale crater in orbital images and was recently investigated up close by the Curiosity rover. Symmetric wave ripple marks within th…

Thank You to Our 2024 Reviewers Open

Kristopher B. Karnauskas, Anantha Aiyyer, Suzana J. Camargo, Fabio A. Capitanio, Sarah J. Feakins , et al. · 2025

On behalf of the journal, AGU, and the scientific community, the editors of Geophysical Research Letters would like to sincerely thank those who reviewed manuscripts in 2024. The hours reading and commenting on manuscripts not only improve…

Pediment formation and subsequent erosion in Gale crater: Clues to the climate history of Mars Open

Alex Bryk, W. E. Dietrich, K. A. Bennett, V. K. Fox, C. Fedo , et al. · 2025

International audience

Geophysical Observations of the 2023 September 24 OSIRIS-REx Sample Return Capsule Reentry Open

Elizabeth A. Silber, Daniel Bowman, C. Carr, David P. Eisenberg, Brian R. Elbing , et al. · 2024

Sample return capsules (SRCs) entering Earth’s atmosphere at hypervelocity from interplanetary space are a valuable resource for studying meteor phenomena. The 2023 September 24 arrival of the Origins, Spectral Interpretation, Resource Ide…

Geological context and significance of the clay-sulfate transition region in Mount Sharp, Gale crater, Mars: An integrated assessment based on orbiter and rover data Open

Melissa J. Meyer, R. E. Milliken, K. M. Stack, L. A. Edgar, E. B. Rampe , et al. · 2024

On Mars, phyllosilicate (“clay”) minerals are often associated with older terrains, and sulfate minerals are associated with younger terrains, and this dichotomy is taken as evidence that Mars’ surface dried up over time. Therefore, in sit…

Thank You to Our 2023 Peer Reviewers Open

Harihar Rajaram, Anantha Aiyyer, Suzana J. Camargo, Christopher D. Cappa, A. J. Dombard , et al. · 2024

On behalf of the journal, AGU, and the scientific community, the editors of Geophysical Research Letters would like to sincerely thank those who reviewed manuscripts for us in 2023. The hours reading and commenting on manuscripts not only …

IN SITU INVESTIGATION OF THE GEDIZ VALLIS RIDGE: A REMNANT LATE-STAGE DEBRIS FLOW DOMINATED FAN DEPOSIT IN GALE CRATER Open

A. B. Bryk, W. E. Dietrich, Christopher M. Fedo, Gwénaël Caravaca, J. M. Davis , et al. · 2024

International audience

Wet to Dry Depositional Environments Recorded in the Clay-Sulfate Transition Region in Gale Crater, Mars: Overview and Stratigraphic Context for Curiosity's Exploration Campaign Open

L. A. Edgar, J. P. Grotzinger, Christopher M. Fedo, Melissa A. Meyer, W. Rapin , et al. · 2024

International audience

THE AMAPARI MARKER BAND, GALE CRATER, MARS: METAL ENRICHMENTS AND POTENTIAL MECHANISMS OF FORMATION Open

P. J. Gasda, Edwin S. Kite, L. M. Thompson, Claire A. Mondro, W. E. Dietrich , et al. · 2024

International audience

Sub‐Diurnal Methane Variations on Mars Driven by Barometric Pumping and Planetary Boundary Layer Evolution Open

John P. Ortiz, Harihar Rajaram, Philip H. Stauffer, K. W. Lewis, R. C. Wiens , et al. · 2024

In recent years, the Tunable Laser Spectrometer within the Sample Analysis at Mars (TLS‐SAM) instrument on board the Mars Science Laboratory (MSL) Curiosity rover has detected methane variations in the atmosphere at Gale crater. Methane co…

Dust Lifting Observations With the Mars Science Laboratory Navigation Cameras Open

Scott D. Guzewich, Emily Mason, M. T. Lemmon, Claire Newman, K. W. Lewis · 2023

Martian dust lifting is believed to occur through two primary mechanisms: dust devils and wind stress forced dust lifting. Gale Crater's varied terrain and meteorology provide a unique in situ perspective on Martian dust lifting, with the …

Dust Lifting Observations with the Mars Science Laboratory Navigation Cameras Open

Scott D. Guzewich, Emily Mason, M. T. Lemmon, Claire Newman, K. W. Lewis · 2023

CSV files containing information on Mars Science Laboratory Navigation Camera observations of dust lifting events. Including dates, sequence identifiers, dust lifting detection statistics, locations of some dust lifting events, and their i…

Geologic Structure of the Vera Rubin Ridge, Gale Crater, Mars Open

Madison Turner, K. W. Lewis · 2023

Mount Sharp is a 5 km high mound of lithified sediments in the center of Gale crater on Mars. The Curiosity rover has been traversing this field site since its arrival in 2012. Curiosity has revealed a complex depositional and diagenetic h…

Sub-diurnal methane variations on Mars driven by barometric pumping and planetary boundary layer evolution Open

John P. Ortiz, Harihar Rajaram, Philip H. Stauffer, K. W. Lewis, R. C. Wiens , et al. · 2023

In recent years, the Sample Analysis at Mars (SAM) instrument on board the Mars Science Laboratory (MSL) Curiosity rover has detected methane variations in the atmosphere at Gale crater. Methane concentrations appear to fluctuate seasonall…

Dust Lifting Observations with the Mars Science Laboratory Navigation Cameras Open

Scott D. Guzewich, Emily Mason, M. T. Lemmon, Claire Newman, K. W. Lewis · 2023

CSV files containing information on Mars Science Laboratory Navigation Camera observations of dust lifting events. Including dates, sequence identifiers, dust lifting detection statistics, locations of some dust lifting events, and their i…

Issue Information Open

Ezra J. Kottler, Kurt Shanebeck, S Collinge, Gillian Bowser, Pamela H. Templer , et al. · 2023

Prospects • Employment opportunities and academic programsCover picture: Each year, vast numbers of photographs are uploaded to online citizen-science biodiversity platforms such as iNaturalist.But within these image libraries, species-lev…

IMPLICATIONS OF THE LOCAL TOPOGRAPHY OF THE MARKER BAND CONTACT, GALE CRATER Open

W. E. Dietrich, A. B. Bryk, Edwin S. Kite, K. W. Lewis, S. Gupta , et al. · 2023

International audience

THE MARKER BAND IN GALE CRATER: A SYNTHESIS OF ORBITAL AND GROUND OBSERVATIONS Open

C. M. Weitz, K. W. Lewis, Edwin S. Kite, W. E. Dietrich, L. M. Thompson , et al. · 2023

International audience

‘HIGH’ BUT NOT SO DRY ON AEOLIS MONS: TRANSIENT LAKE SYSTEMS IN HESPERIAN DESERTS IN GALE CRATER. Open

Sanjeev Gupta, W. E. Dietrich, K. W. Lewis, Edwin S. Kite, C. A. Mondro , et al. · 2023

International audience

Dataset for: Bedding scale correlation on Mars in western Arabia Terra Open

Andrew M. Annex, K. W. Lewis, Ari Koeppel, Christopher S. Edwards · 2023

Dataset for: Bedding scale correlation on Mars in western Arabia Terra A.M. Annex et al. Data Product Overview This repository contains all source data for the publication. Below is a description of each general data product type, software…

Dataset for: Bedding scale correlation on Mars in western Arabia Terra Open

Andrew M. Annex, K. W. Lewis, Ari Koeppel, Christopher S. Edwards · 2023

Dataset for: Bedding scale correlation on Mars in western Arabia Terra A.M. Annex et al. Data Product Overview This repository contains all source data for the publication. Below is a description of each general data product type, software…

The five 'C's of lifelong learning: CPD, choices, collegiality, challenges and consequences Open

K. W. Lewis · 2023

K. W. Lewis YOU? Author Swipe