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Geophys Res Lett

Title:		Imaging Mercury's Polar Deposits during MESSENGER's Low-altitude Campaign
Author(s):		Chabot NL; Ernst CM; Paige DA; Nair H; Denevi BW; Blewett DT; Murchie SL; Deutsch AN; Head JW; Solomon SC;
Address:		"The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland, USA. Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, California, USA. Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, Rhode Island, USA. Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York, USA. Department of Terrestrial Magnetism, Carnegie Institution of Washington, Washington, District of Columbia, USA"
Journal Title:		Geophys Res Lett
Year:		2016
Volume:		20160917
Issue:		18
Page Number:		9461 - 9468
DOI:		10.1002/2016GL070403
ISSN/ISBN:		0094-8276 (Print) 1944-8007 (Electronic) 0094-8276 (Linking)
Abstract:		"Images obtained during MESSENGER's low-altitude campaign in the final year of the mission provide the highest-spatial-resolution views of Mercury's polar deposits. Images for distinct areas of permanent shadow within 35 north polar craters were successfully captured during the campaign. All of these regions of permanent shadow were found to have low-reflectance surfaces with well-defined boundaries. Additionally, brightness variations across the deposits correlate with variations in the biannual maximum surface temperature across the permanently shadowed regions, supporting the conclusion that multiple volatile organic compounds are contained in Mercury's polar deposits, in addition to water ice. A recent large impact event or ongoing bombardment by micrometeoroids could deliver water as well as many volatile organic compounds to Mercury. Either scenario is consistent with the distinctive reflectance properties and well-defined boundaries of Mercury's polar deposits and the presence of volatiles in all available cold traps"
Keywords:
Notes:		"PubMed-not-MEDLINEChabot, Nancy L Ernst, Carolyn M Paige, David A Nair, Hari Denevi, Brett W Blewett, David T Murchie, Scott L Deutsch, Ariel N Head, James W Solomon, Sean C eng NNX15AK89G/NASA/ 2017/09/26 Geophys Res Lett. 2016 Sep 28; 43(18):9461-9468. doi: 10.1002/2016GL070403. Epub 2016 Sep 17"