Debris accumulations of CO2 ice in the south polar residual cap of mars: Longevity and processes

Thomas, P. C.; Calvin, W. M.; James, P. B.

doi:10.1016/j.icarus.2020.113625

Cited by 5 publications

(2 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figures 7c and 9c demonstrate that this phenomenon is not limited to the already unusual MY 28 summer. This is a surprising result and suggests that CO 2 ice contributes to non-RCD surfaces even at the latest stages of summer and even at distances several kilometers from the edge of what has canonically been considered the residual CO 2 ice cap (e.g., by Tanaka et al, 2007;Thomas et al, 2020).…”

Section: Seasonal and Residual Ice Stratigraphy Along Rcd Marginsmentioning

confidence: 98%

“…At the meter-scale, the surface of the RCD displays contrasting high-and low-albedo patches (e.g., Figure 7b), interpreted as residual CO 2 ice and exposed H 2 O ice-rich material, respectively. The tendency of the dark material to preferentially absorb solar radiation is thought to be the key driver behind the formation of different erosional features, and ultimately, the characteristic terrains of the RCD (Thomas et al, 2020). For example, Buhler et al (2017) propose a mechanism in which sublimation of CO 2 ice undermines the structural support of the surface, causing a collapse and meter-scale surface pitting.…”

Section: Seasonal and Residual Ice Stratigraphy Along Rcd Marginsmentioning

confidence: 99%

See 1 more Smart Citation

Characterizing Seasonal and Residual Ices at the South Pole of Mars Using a Universal Set of CRISM Spectral Endmembers

et al. 2022

View full text Add to dashboard Cite

Ice deposits in the south polar region of Mars are in constant exchange with the atmosphere, allowing them to reflect near-term seasonal changes and preserve records of long-term climate variation (Buhler et al., 2020;Leighton & Murray, 1966;Smith et al., 2020). Like its northern counterpart, the south pole is blanketed each winter by CO 2 ice condensed from the atmosphere and hosts an extensive dome of interbedded water ice and dust (Plaut et al., 2007;Prettyman et al., 2009). These south polar layered deposits (SPLD) rise 3-4 km from the surrounding terrain and reflect 30-100 Myr of Mars climate history (Byrne, 2009). However, the south is unique in its retention of a 1-10 m-thick slab of perennial CO 2 ice, which is perched atop the south polar dome; together with surrounding water ice exposures, these CO 2 ice deposits comprise the south polar residual cap (SPRC).Over 50 years of close observation have revealed the SPRC and other south polar ices to be as complex as they are dynamic. Erosional pits and troughs (Byrne & Ingersoll, 2003;Thomas et al., 2005) are seen to grow

show abstract

Section: Seasonal and Residual Ice Stratigraphy Along Rcd Marginsmentioning

confidence: 98%

Section: Seasonal and Residual Ice Stratigraphy Along Rcd Marginsmentioning

confidence: 99%