A large new crater exposes the limits of water ice on Mars

Geophysical Research Letters
By: , and 



Water ice in the Martian mid-latitudes has advanced and retreated in response to variations in the planet's orbit, obliquity, and climate. A 150 m-diameter new impact crater near 35°N provides the lowest-latitude impact exposure of subsurface ice on Mars. This is the largest known ice-exposing crater and provides key constraints on Martian climate history. This crater indicates a regional, relatively pure ice deposit that is unstable and has nearly vanished. In the past, this deposit may have been tens of meters thick and extended equatorward of 35°N. We infer that it is overlain by pore ice emplaced during temporary stable intervals, due to recent climate variability. The marginal survival of ice here suggests that it is near the edge of shallow ice that regularly exchanges with the atmosphere.

Publication type Article
Publication Subtype Journal Article
Title A large new crater exposes the limits of water ice on Mars
Series title Geophysical Research Letters
DOI 10.1029/2022GL100747
Volume 50
Year Published 2023
Language English
Publisher American Geophysical Union
Contributing office(s) Astrogeology Science Center
Description e2022GL100747, 9 p.
Other Geospatial Mars
Google Analytic Metrics Metrics page
Additional publication details