Polar science results from Mars Reconnaissance Orbiter: Multiwavelength, multiyear insights

Landis, M.E.; Acharya, P.J.; Alsaeed, N.R.; Andres, C.; Becerra, P.; Calvin, W.M.; Cangi, E.M.; Cartwright, S.F.A.; Chaffin, M.S.; Diniega, S.; Dundas, C.M.; Hansen, C.J.; Hayne, P.O.; Herkenhoff, K.E.; Kass, D.M.; Khuller, A.R.; McKeown, L.E.; Russell, P.S.; Smith, I.B.; Sutton, S.S.; Widmer, J.M.; Whitten, J.L.

doi:10.1016/j.icarus.2023.115794

Cited by 3 publications

(2 citation statements)

References 246 publications

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“…Both the present dynamics of Mars's climate and its evolution over the past tens of millions of years are preserved in the icy stratigraphy of the planet's south pole (Byrne, 2009). This has drawn an evergrowing body of observation and related research into the processes that have shaped this fascinating region (Smith, 2022;Landis et al, 2023). A detailed understanding of surface composition is key to interpreting the climate history that these landscapes preserve, specifically how the formation and evolution of ice deposits are influenced by variable mixtures of CO2 ice, H2O ice, and settled atmospheric dust.…”

Section: Introductionmentioning

confidence: 99%

Spatial and Temporal Variation of Mars South Polar Ice Composition from Spectral Endmember Classification of CRISM Mapping Data

Cartwright

Calvin

Seelos³

et al. 2023

Preprint

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Multispectral mapping data from the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) provide a unique opportunity to characterize south polar ice deposits at higher spectral sampling, spatial resolution, or spatiotemporal coverage than previous work. This new perspective can help to constrain the nature and distribution of different mixtures of CO2 ice, H2O ice, and dust that influence the formation, evolution, and preservation of Mars climate records. We processed 1103 CRISM observations spanning southern summer of six Mars Years (MY) through a combination of k-means clustering and random forest classification. Using a set of 12 spectral endmembers directly tied to previous work with high-resolution CRISM targeted data, we made a series of temporally restricted mosaics showing surface spectral variation over time. The mosaics show the effects of the MY 28 dust storm on the removal of the seasonal CO2 ice cap that year and new details of how this process differed from the years that followed. A mosaic showing residual ice surfaces displays broad agreement with previous compositional maps while resolving new details in the distribution of H2O ice-rich material around the periphery of the bright CO2 ice cap. By showing how surface composition varies across a broad swath of the south polar region though time, the endmember set and classified mosaics produced in this work can provide critical context for future studies of the dynamic processes that shape south polar ice deposits.

show abstract

Section: Introductionmentioning

confidence: 99%

Spatial and Temporal Variation of Mars South Polar Ice Composition from Spectral Endmember Classification of CRISM Mapping Data

Cartwright

Calvin

Seelos³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…

Both the present dynamics of Mars's climate and its evolution over the past tens of millions of years are preserved in the icy stratigraphy of the planet's south pole (Byrne, 2009). This has drawn an evergrowing body of observation and related research into the processes that have shaped this fascinating region (Landis et al, 2023;Smith, 2022). A detailed understanding of surface composition is key to interpreting the climate history that these landscapes preserve, specifically how the formation and evolution of ice deposits are influenced by variable mixtures of CO 2 ice, H 2 O ice, and settled atmospheric dust.

…”

mentioning

confidence: 99%

Spatial and Temporal Variation of Mars South Polar Ice Composition From Spectral Endmember Classification of CRISM Mapping Data

Cartwright,

Calvin,

Seelos

et al. 2023

JGR Planets

View full text Add to dashboard Cite

Multispectral mapping data from the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) provide a unique opportunity to characterize south polar ice deposits at higher spectral sampling, spatial resolution, or spatiotemporal coverage than previous work. This new perspective can help constrain the nature and distribution of different mixtures of CO2 ice, H2O ice, and dust that influence the formation, evolution, and preservation of Mars climate records. We processed 1,103 CRISM observations spanning the southern summer of six Mars Years (MYs) through a combination of k‐means clustering and random forest classification. Using a set of 12 spectral endmembers directly tied to previous work with high‐resolution CRISM targeted data, we made a series of temporally restricted mosaics showing surface spectral variation over time. The mosaics show the effects of the MY 28 dust storm on the removal of the seasonal CO2 ice cap that year and reveal how this process differed from the years that followed. A mosaic showing residual ice surfaces displays broad agreement with previous compositional maps while resolving new details in the distribution of H2O ice‐rich material around the periphery of the bright CO2 ice cap. By showing how surface composition varies across a broad swath of the south polar region through time, the endmember set and classified mosaics produced in this work can provide critical context for future studies of the dynamic processes that shape south polar ice deposits.

show abstract

A comparison of CO2 seasonal activity in Mars' northern and southern hemispheres

Hansen,

Byrne,

Calvin

et al. 2024

Icarus

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Polar science results from Mars Reconnaissance Orbiter: Multiwavelength, multiyear insights

Cited by 3 publications

References 246 publications

Spatial and Temporal Variation of Mars South Polar Ice Composition from Spectral Endmember Classification of CRISM Mapping Data

Spatial and Temporal Variation of Mars South Polar Ice Composition from Spectral Endmember Classification of CRISM Mapping Data

Spatial and Temporal Variation of Mars South Polar Ice Composition From Spectral Endmember Classification of CRISM Mapping Data

A comparison of CO2 seasonal activity in Mars' northern and southern hemispheres

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