Seasonal patterns of condensation and sublimation cycles in the cryptic and non-cryptic regions of the South Pole

Jeng Jong Jian, Wing Huen Ip

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The South Pole of Mars is characterized by an asymmetric residual ice cap composed of water ice and CO 2 ice. On the opposite side of the residual cap, there exists an area called cryptic region which is relatively free of ice during summer time. Many fan-shaped km-scale structures apparently caused by a wind-blown system of dust-laden gas jets occurred dozens degrees of Ls before the complete sublimation of the CO 2 frost layer. We have examined the seasonal cycles of condensation and sublimation in the cryptic and non-cryptic regions by using the topographic data from the MOLA/MGS measurements. Using the MOLA topography data collected over one Martian year (1999-2001), we have studied the temporal elevation change and the seasonal cycle of the carbon dioxide frost on the southern polar caps. We have produced mapping of the seasonal CO 2 frost thickness variation for seven Ls (30°, 60°, 90°, 120°, 150°, 180°, 210°, 240°, 270° and 330°). It is found that the time variations of the CO 2 frost thickness in these two regions are quite similar. The greatest thickness of the CO 2 frost layer is about 0.76-0.78 m in both places occurs at Ls = 150°.

Original languageEnglish
Pages (from-to)138-142
Number of pages5
JournalAdvances in Space Research
Volume43
Issue number1
DOIs
StatePublished - 5 Jan 2009

Keywords

  • CO frost layer
  • Cryptic region
  • Martian South Pole
  • Sublimation

Fingerprint

Dive into the research topics of 'Seasonal patterns of condensation and sublimation cycles in the cryptic and non-cryptic regions of the South Pole'. Together they form a unique fingerprint.

Cite this