Massive CO2 Ice Deposits Sequestered in the South Polar Layered Deposits of Mars

  title={Massive CO2 Ice Deposits Sequestered in the South Polar Layered Deposits of Mars},
  author={Roger J. Phillips and Brian J. Davis and Kenneth L. Tanaka and Shane Byrne and Michael Tyler Mellon and Nathaniel E. Putzig and Robert M. Haberle and Melinda A. Kahre and Bruce A. Campbell and Lynn M. Carter and I. B. Smith and John W. Holt and Suzanne E. Smrekar and Daniel Nunes and Jeffrey J. Plaut and Anthony F. Egan and Timothy N. Titus and Roberto Seu},
  pages={838 - 841}
Radar measurements reveal a substantial buried deposit of carbon dioxide in the south pole of Mars. Shallow Radar soundings from the Mars Reconnaissance Orbiter reveal a buried deposit of carbon dioxide (CO2) ice within the south polar layered deposits of Mars with a volume of 9500 to 12,500 cubic kilometers, about 30 times that previously estimated for the south pole residual cap. The deposit occurs within a stratigraphic unit that is uniquely marked by collapse features and other evidence of… Expand
Stratigraphy and evolution of the buried CO2 deposit in the Martian south polar cap
Observations by the Shallow Radar instrument on Mars Reconnaissance Orbiter reveal several deposits of buried CO2 ice within the south polar layered deposits. Here we present mapping thatExpand
A subsurface depocenter in the South Polar Layered Deposits of Mars
The South Polar Layered Deposits (SPLD) are one of the largest water ice reservoirs on Mars, and their accumulation is driven by variations in the climate primarily controlled by orbital forcings.Expand
The formation and stability of buried polar CO2 deposits on Mars
Abstract Shallow Radar soundings of the south polar layered deposits (SPLD) have revealed buried CO 2 ice with as many as three distinct layers separated by thinner layers of water ice (Bierson etExpand
Cold-Trapping Mars' Atmosphere
  • P. Thomas
  • Environmental Science, Medicine
  • Science
  • 2011
The Mars Reconnaissance Orbiter has observed large deposits of frozen CO2 at Mars' southern polar region, and these are most likely composed of solid CO2 and comparable in mass to the present Mars atmosphere. Expand
Explaining Bright Radar Reflections Below The Martian South Polar Layered Deposits Without Liquid Water
Introduction Recent discoveries of anomalously bright radar reflections below the Mars South Polar Layered Deposit (SPLD) have sparked new speculation that liquid water may be present below the iceExpand
SHARAD observations of recent geologic features on Mars
The Shallow Radar (SHARAD) instrument on the Mars Reconnaissance Orbiter (MRO) observes a variety of recent features on Mars, including deposits of water ice at both poles and in the mid-latitudes,Expand
Characteristics of the Basal Interface of the Martian South Polar Layered Deposits
Introduction: The South Polar Layered Deposits (SPLD) are several kilometer-thick stacks of layered H2O ice deposits extending outward from the martian south pole. The layers within the SPLD areExpand
The Rheological Behavior of CO 2 Ice: Application to Glacial Flow on Mars
Introduction: Recent radar soundings by the Mars Reconnaissance Orbiter provide evidence for large carbon dioxide (CO2) deposits contained within the South Polar Layered Deposits (SPLD) of MarsExpand
Compositional Constraints on the North Polar Cap of Mars from Gravity and Topography
The polar ice caps are the largest reservoir of water ice on Mars. The north polar ice cap is composed of the ice‐rich north polar layered deposit (NPLD) and a lower‐lying, silicate‐rich basal unitExpand
Obliquity dependence of the formation of the martian polar layered deposits
Mars' polar layered deposits (PLD) are comprised of layers of varying dust-to-water ice volume mixing ratios (VMR) that may record astronomically-forced climatic variation over Mars' recent orbitalExpand


Mars North Polar Deposits: Stratigraphy, Age, and Geodynamical Response
The Shallow Radar (SHARAD) on the Mars Reconnaissance Orbiter has imaged the internal stratigraphy of the north polar layered deposits of Mars, revealing a laterally continuous deposition of layers which typically consist of four packets of finely spaced reflectors separated by homogeneous interpacket regions of nearly pure ice. Expand
Accumulation and Erosion of Mars' South Polar Layered Deposits
The sounding radar SHARAD on the Mars Reconnaissance Orbiter mapped detailed subsurface stratigraphy in the Promethei Lingula region of the south polar plateau, Planum Australe, indicating recent erosion of ice-rich layered deposits. Expand
A Sublimation Model for Martian South Polar Ice Features
This work argues that a carbon dioxide ice layer about 8 meters thick is being etched away to reveal water ice underneath on Mars, consistent with thermal infrared data from the Mars Odyssey mission. Expand
Radar subsurface mapping of the polar layered deposits on Mars
[1] Determining the three-dimensional (3-D) structure of the Martian polar caps is fundamental to understanding their hydrologic history, dynamic behavior, past climatic changes, and the underlyingExpand
Residual south polar cap of Mars: Stratigraphy, history, and implications of recent changes
Abstract The residual south polar cap (RSPC) of Mars includes a group of different depositional units of CO 2 ice undergoing a variety of erosional processes. Complete summer coverage of the RSPC byExpand
Subsurface structure of Planum Boreum from Mars Reconnaissance Orbiter Shallow Radar soundings
Abstract We map the subsurface structure of Planum Boreum using sounding data from the Shallow Radar (SHARAD) instrument onboard the Mars Reconnaissance Orbiter. Radar coverage throughout theExpand
The Residual Ice Cap of Planum Australe, Mars: New Insights from the HRSC Experiment
Introduction: This abstract reports on new HRSC-based geologic mapping of the Late Amazonian south polar residual ice cap (RIC) deposits that mantle Planum Australe, Mars. Geologic Setting: PlanumExpand
Mars' volatile and climate history
This work piece together the relevant observations into a coherent view of the evolution of the martian climate, focusing in particular on the observations that provide the strongest constraints. Expand
Mars south polar spring and summer temperatures: A residual CO2 frost
The Viking infrared thermal mapper (IRTM) has measured reflected and emitted energy over Mars south polar cap throughout the martian spring and summer. During these 1976–1977 observations the polarExpand
The atmospheric circulation and dust activity in different orbital epochs on Mars
A general circulation model is used to evaluate changes to the circulation and dust transport in the martian atmosphere for a range of past orbital conditions. A dust transport scheme, includingExpand