@article{1d8b649e04404d8da42a7abed9c2370a,
title = "A Large New Crater Exposes the Limits of Water Ice on Mars",
abstract = "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.",
keywords = "Mars, climate, ice, midlatitudes, subsurface",
author = "Dundas, {Colin M.} and Mellon, {Michael T.} and Posiolova, {Liliya V.} and Katarina Miljkovi{\'c} and Collins, {Gareth S.} and Tornabene, {Livio L.} and Rangarajan, {Vidhya Ganesh} and Golombek, {Matthew P.} and Warner, {Nicholas H.} and Daubar, {Ingrid J.} and Shane Byrne and McEwen, {Alfred S.} and Seelos, {Kimberly D.} and Donna Viola and Bramson, {Ali M.} and Gunnar Speth",
note = "Funding Information: We thank the operations teams of MRO, HiRISE, CTX, and CRISM. This work was funded by the Mars Reconnaissance Orbiter Project, the InSight Project, NASA Grant 80NSSC20K0971 to IJD, Australian Research Council Grant FT210100063 to KM, and UK Science and Technology Facilities Council Grant ST/S000615/1 to GSC. LLT and VGR acknowledge funding and support from the Canadian NSERC Discovery Grant programme (RGPIN 2020-06418) and the Canadian Space Agency (CSA) Planetary and Astronomy Missions Co-Investigator programme (22EXPCOI3). A portion of the research described in this paper was done by the InSight Project, Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. Tim Haltigin and an anonymous reviewer provided helpful comments. We thank the developers of iSALE-2D, including Gareth Collins, Kai W{\"u}nnemann, Dirk Elbeshausen, Tom Davison, Boris Ivanov, and Jay Melosh. We thank Kris Akers for producing a HiRISE DTM. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Funding Information: We thank the operations teams of MRO, HiRISE, CTX, and CRISM. This work was funded by the Mars Reconnaissance Orbiter Project, the InSight Project, NASA Grant 80NSSC20K0971 to IJD, Australian Research Council Grant FT210100063 to KM, and UK Science and Technology Facilities Council Grant ST/S000615/1 to GSC. LLT and VGR acknowledge funding and support from the Canadian NSERC Discovery Grant programme (RGPIN 2020‐06418) and the Canadian Space Agency (CSA) Planetary and Astronomy Missions Co‐Investigator programme (22EXPCOI3). A portion of the research described in this paper was done by the InSight Project, Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. Tim Haltigin and an anonymous reviewer provided helpful comments. We thank the developers of iSALE‐2D, including Gareth Collins, Kai W{\"u}nnemann, Dirk Elbeshausen, Tom Davison, Boris Ivanov, and Jay Melosh. We thank Kris Akers for producing a HiRISE DTM. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Publisher Copyright: {\textcopyright} 2022 Jet Propulsion Laboratory, California Institute of Technology. Government sponsorship acknowledged and The Authors. This article has been contributed to by U.S. Government employees and their work is in the public domain in the USA.",
year = "2023",
month = jan,
day = "28",
doi = "10.1029/2022GL100747",
language = "English (US)",
volume = "50",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "2",
}