A revised surface age for the North Polar Layered Deposits of Mars

Persistent Link:
http://hdl.handle.net/10150/615108
Title:
A revised surface age for the North Polar Layered Deposits of Mars
Author:
Landis, Margaret E.; Byrne, Shane; Daubar, Ingrid J.; Herkenhoff, Kenneth E.; Dundas, Colin M.
Affiliation:
Univ Arizona, Lunar & Planetary Lab
Issue Date:
2016-04-16
Publisher:
AMER GEOPHYSICAL UNION
Citation:
A revised surface age for the North Polar Layered Deposits of Mars 2016, 43 (7):3060 Geophysical Research Letters
Journal:
Geophysical Research Letters
Rights:
©2016. American Geophysical Union.All Rights Reserved.
Collection Information:
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
Abstract:
The North Polar Layered Deposits (NPLD) of Mars contain a complex stratigraphy that has been suggested to retain a record of past eccentricity- and obliquity-forced climate changes. The surface accumulation rate in the current climate can be constrained by the crater retention age. We scale NPLD crater diameters to account for icy target strength and compare surface age using a new production function for recent small impacts on Mars to the previously used model of Hartmann (2005). Our results indicate that ice is accumulating in these craters several times faster than previously thought, with a 100m diameter crater being completely infilled within centuries. Craters appear to have a diameter-dependent lifetime, but the data also permit a complete resurfacing of the NPLD at similar to 1.5 ka.
Note:
Published online 5 April 2016. 6 month embargo.
ISSN:
00948276
DOI:
10.1002/2016GL068434
Keywords:
CRATERING RATE; IMPACT CRATERS; CAP; STRATIGRAPHY; CLIMATE; RATES; EVOLUTION; EVENTS; SIZE; FLOW
Version:
Final published version
Sponsors:
This work was funded by NASA grant NNX13AG72G. M.E.L. was supported by the National Science Foundation Graduate Research Fellowship Program, grant DGE-1143953. HiRISE images referenced are available on the instrument's public website: https://hirise.lpl.arizona.edu. The crater catalog used in this work is included with this paper as supporting information. The authors thank S. Sutton for help with SOCET Set software, M.M. Sori for useful discussion on viscous relaxation, and M.E. Banks for useful discussion on the impact population. The authors additionally thank J.A. Skinner, P. Becerra, D. Laikko, M. Sori, N. Barlow, and an anonymous reviewer for helpful comments on the manuscript.
Additional Links:
http://doi.wiley.com/10.1002/2016GL068434

Full metadata record

DC FieldValue Language
dc.contributor.authorLandis, Margaret E.en
dc.contributor.authorByrne, Shaneen
dc.contributor.authorDaubar, Ingrid J.en
dc.contributor.authorHerkenhoff, Kenneth E.en
dc.contributor.authorDundas, Colin M.en
dc.date.accessioned2016-06-30T01:48:22Z-
dc.date.available2016-06-30T01:48:22Z-
dc.date.issued2016-04-16-
dc.identifier.citationA revised surface age for the North Polar Layered Deposits of Mars 2016, 43 (7):3060 Geophysical Research Lettersen
dc.identifier.issn00948276-
dc.identifier.doi10.1002/2016GL068434-
dc.identifier.urihttp://hdl.handle.net/10150/615108-
dc.description.abstractThe North Polar Layered Deposits (NPLD) of Mars contain a complex stratigraphy that has been suggested to retain a record of past eccentricity- and obliquity-forced climate changes. The surface accumulation rate in the current climate can be constrained by the crater retention age. We scale NPLD crater diameters to account for icy target strength and compare surface age using a new production function for recent small impacts on Mars to the previously used model of Hartmann (2005). Our results indicate that ice is accumulating in these craters several times faster than previously thought, with a 100m diameter crater being completely infilled within centuries. Craters appear to have a diameter-dependent lifetime, but the data also permit a complete resurfacing of the NPLD at similar to 1.5 ka.en
dc.description.sponsorshipThis work was funded by NASA grant NNX13AG72G. M.E.L. was supported by the National Science Foundation Graduate Research Fellowship Program, grant DGE-1143953. HiRISE images referenced are available on the instrument's public website: https://hirise.lpl.arizona.edu. The crater catalog used in this work is included with this paper as supporting information. The authors thank S. Sutton for help with SOCET Set software, M.M. Sori for useful discussion on viscous relaxation, and M.E. Banks for useful discussion on the impact population. The authors additionally thank J.A. Skinner, P. Becerra, D. Laikko, M. Sori, N. Barlow, and an anonymous reviewer for helpful comments on the manuscript.en
dc.language.isoenen
dc.publisherAMER GEOPHYSICAL UNIONen
dc.relation.urlhttp://doi.wiley.com/10.1002/2016GL068434en
dc.rights©2016. American Geophysical Union.All Rights Reserved.en
dc.subjectCRATERING RATEen
dc.subjectIMPACT CRATERSen
dc.subjectCAPen
dc.subjectSTRATIGRAPHYen
dc.subjectCLIMATEen
dc.subjectRATESen
dc.subjectEVOLUTIONen
dc.subjectEVENTSen
dc.subjectSIZEen
dc.subjectFLOWen
dc.titleA revised surface age for the North Polar Layered Deposits of Marsen
dc.typeArticleen
dc.contributor.departmentUniv Arizona, Lunar & Planetary Laben
dc.identifier.journalGeophysical Research Lettersen
dc.description.notePublished online 5 April 2016. 6 month embargo.en
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en
dc.eprint.versionFinal published versionen
dc.contributor.institutionLunar and Planetary Laboratory; University of Arizona; Tucson Arizona USA-
dc.contributor.institutionLunar and Planetary Laboratory; University of Arizona; Tucson Arizona USA-
dc.contributor.institutionJet Propulsion Laboratory; California Institute of Technology; Pasadena California USA-
dc.contributor.institutionUnited States Geological Survey; Astrogeology Science Center; Flagstaff Arizona USA-
dc.contributor.institutionUnited States Geological Survey; Astrogeology Science Center; Flagstaff Arizona USA-
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