Seasonal and Short Timescale Changes on the Martian Surface: Multi-Spacecraft Perspectives DOI Creative Commons
N. Thomas, A. Pommerol,

E. Hauber

и другие.

Space Science Reviews, Год журнала: 2024, Номер 221(1)

Опубликована: Дек. 19, 2024

Abstract The continued operation of missions such as Mars Express, Reconnaissance Orbiter, and the ExoMars Trace Gas Orbiter has greatly enhanced our knowledge seasonal processes on Mars. most apparent evidence importance seasons large scale is annual variation in sizes Martian polar caps. However, high resolution imaging also shown that forcing can lead to small-scale phenomena are continuously changing topography surface photometry. These often have no terrestrial analogue involve complex interactions between ices, atmosphere, substrate (surface sub-surface). Although we now better understanding many these (occasionally a result laboratory simulation), direct proof some hypotheses remains elusive. We provide brief review list series open questions.

Язык: Английский

A Global Dataset of Potential Chloride Deposits on Mars as Identified by TGO CaSSIS DOI Creative Commons
Valentin Bickel, N. Thomas, A. Pommerol

и другие.

Scientific Data, Год журнала: 2024, Номер 11(1)

Опубликована: Авг. 3, 2024

Abstract Chloride deposits are markers for early Mars’ aqueous past, with important implications our understanding of the martian climate and habitability. The Colour Stereo Surface Imaging System (CaSSIS) onboard ESA’s Trace Gas Orbiter provides high-resolution color-infrared images, enabling a planet-wide search (small) potentially chloride-bearing deposits. Here, we use neural network to map in CaSSIS images over significant fraction planet. We identify 965 chloride deposit candidates diameters ranging from <300 >3000 m, including previously unknown deposits, 136 (~14%) which located highlands north equator, up ~36°N. Northern tend be smaller than south predominantly small-scale topographic depressions low-albedo Noachian Hesperian highland terranes. Our new dataset augments existing maps, informs current future imaging campaigns, enables modelling work towards better distribution near-surface water distant past.

Язык: Английский

Процитировано

5
Albedo analysis of dust devil-induced slope streaks and tracks on Mars DOI Creative Commons
T. Heyer, J. Raack, Wajiha Iqbal

и другие.

Icarus, Год журнала: 2024, Номер 423, С. 116270 - 116270

Опубликована: Авг. 22, 2024

Язык: Английский

Процитировано

1
Novel quantitative methods to enable multispectral identification of high-purity water ice exposures on Mars using High Resolution Imaging Science Experiment (HiRISE) images DOI
Vidhya Ganesh Rangarajan, L. L. Tornabene, G. R. Osinski

и другие.

Icarus, Год журнала: 2023, Номер 419, С. 115849 - 115849

Опубликована: Ноя. 4, 2023

Язык: Английский

Процитировано

3
Geometric processing of TGO CaSSIS observations DOI Creative Commons
Jason Perry, R. Heyd, Matthew Read

и другие.

Planetary and Space Science, Год журнала: 2022, Номер 223, С. 105581 - 105581

Опубликована: Окт. 19, 2022

Язык: Английский

Процитировано

5
A global map of gullied hillslopes on Mars DOI Creative Commons
Axel Noblet, Susan J. Conway, G. R. Osinski

и другие.

Icarus, Год журнала: 2024, Номер 418, С. 116147 - 116147

Опубликована: Май 26, 2024

The distribution of gullies on Mars has been used to support different modes formation involving CO2, H2O or entirely dry processes. We mapped the extent gullied hillslope using a global mosaic ConTeXt camera (CTX) at 6 m/pixel and High Resolution Imaging Science Experiment (HiRISE) browse products ~3 m/pixel. Our new globalcatalog hillslopes allows for quantitative, area-based analysis both regional scale, which was not possible with point-based more localized previous datasets. analyzed aspect gradient information derived from MOLA topography every hillslope. have confirmed trends identified in works, are that mean is lower than 30°, angle repose material Mars, preferred latitude-dependent, shift between pole-facing equator-facing happening around 40° hemispheres. established hierarchy factors can explain hillslopes: Latitude strictest control because constrained 26°-83°S 28°-76°N. availability steep slopes strong over gully distribution, we observed reflects orientation large reliefs, implies less factor explaining distribution. correlation subsurface water ice consistency map, found preferentially distributed areas some ground rather no all. first time bias toward an east-facing trend southern hemisphere poleward ~40° latitude. also linked our dataset crater morphometry dataset: 63% area craters, find covered by given positively correlated depth diameter ratio this crater. observations point complex interplay local slope, insolation, thermal properties substrate spatial current population gullies. Finally, assessed very high resolution (sub-meter) imagery coverage be 36% repeated reaches 21% gullies, hence would need expanding better understand active

Язык: Английский

Процитировано

0
Seasonal and Short Timescale Changes on the Martian Surface: Multi-Spacecraft Perspectives DOI Creative Commons
N. Thomas, A. Pommerol,

E. Hauber

и другие.

Space Science Reviews, Год журнала: 2024, Номер 221(1)

Опубликована: Дек. 19, 2024

Abstract The continued operation of missions such as Mars Express, Reconnaissance Orbiter, and the ExoMars Trace Gas Orbiter has greatly enhanced our knowledge seasonal processes on Mars. most apparent evidence importance seasons large scale is annual variation in sizes Martian polar caps. However, high resolution imaging also shown that forcing can lead to small-scale phenomena are continuously changing topography surface photometry. These often have no terrestrial analogue involve complex interactions between ices, atmosphere, substrate (surface sub-surface). Although we now better understanding many these (occasionally a result laboratory simulation), direct proof some hypotheses remains elusive. We provide brief review list series open questions.

Язык: Английский

Процитировано

0