Seasonally active frost-dust avalanches on a north polar scarp of Mars captured by HiRISE

Seasonally active frost-dust avalanches on a north polar scarp of Mars captured by HiRISE

[1] North-polar temporal monitoring by the High Resolution Imaging Science Experiment (HiRISE) orbiting Mars has discovered new, dramatic examples that Mars’ CO2-dominated seasonal volatile cycle is not limited to quiet deposition and sublimation of frost. In early northern martian spring, 2008, HiRISE captured several cases of CO2 frost and dust cascading down a steep, polar scarp in discrete ...

Seasonally active slipface avalanches in the north polar sand sea of Mars : 1 Evidence for a wind - related origin 2 3

Heights and Slopes on Mars North Polar Scarps Using Hirise Point-to-point

Given the challenge and scientific importance of measuring vertical elevation distances and slopes in high-relief environments over 100s mto ~1 kmscales (such as steep north polar scarps), we develop a technique to make such measurements that yields results more accurate than MOLA (in these situations) yet is not as complex and resource-intensive as producing a full scale DEM. The technique yie...

North polar frontal clouds and dust storms on Mars during spring and summer

0019-1035/$ see front matter 2009 Elsevier Inc. A doi:10.1016/j.icarus.2009.05.028 * Corresponding author. E-mail address: [email protected] (H. Wang The complete archive of Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) Mars Daily Global Maps (MDGM) are used to study north polar clouds and dust storms that exhibit frontal structures during the spring and summer (Ls 0–180 ). Results s...

Thermal Contraction Crack Polygons on Mars: Classification, Distribution, and Con- Text for Phoenix from North and South Polar Hirise Observations

Introduction: The detection of subsurface ice at the po-lygonally-patterned Phoenix landing site [1] is the culmination of over thirty years of Mars permafrost and polygons research [2-6]. The exploration of martian polygonally pat-terned ground addresses several critical questions related to recent martian habitability and climate processes: 1) what is the origin of ice in the shallow martian ...