DOI: 10.1002/grl.50293
论文题名: Orbital radar, imagery, and atmospheric modeling reveal an aeolian origin for Abalos Mensa, Mars
作者: Brothers T.C. ; Holt J.W. ; Spiga A.
刊名: Geophysical Research Letters
ISSN: 0094-9175
EISSN: 1944-8906
出版年: 2013
卷: 40, 期: 7 起始页码: 1334
结束页码: 1339
语种: 英语
英文关键词: Abalos Mensa
; aeolian
; deposit
; ice
; Mars
; SHARAD
Scopus关键词: Abalos Mensa
; aeolian
; Atmospheric depositions
; Digital elevation model
; High resolution imagery
; Mars
; Scientific investigation
; SHARAD
; Atmospheric structure
; Erosion
; Ice
; Meteorological problems
; Radar
; Shielding
; Deposits
; atmospheric deposition
; atmospheric modeling
; data set
; eolian process
; ice cover
; imagery
; integrated approach
; Mars
; Martian atmosphere
; outflow
; paleotopography
; radar
英文摘要: Icy deposits surrounding Planum Boreum, Mars, contain crucial information for deciphering paleoclimate and past geologic processes at the martian north pole. One such deposit, Abalos Mensa, is an enigmatic wedge of material located near the ~ 1 km high Rupes Tenuis. Its unique location and lobate morphology have fostered formation hypotheses that assume either fluvial or aeolian erosion of a once-larger ice deposit. The aeolian scenario posed previously requires impact shielding of ancient basal unit material to provide an erosional remnant which seeds later deposition, while the fluvial hypotheses invoke cryovolcanism beneath the younger north polar layered deposits (NPLD) and associated outflow to erode the adjacent chasmata. Here we combine newly available radar sounding data, high-resolution imagery, digital elevation models, and atmospheric modeling to examine internal structure and infer both the mechanisms for, and timing of, Abalos Mensa formation. From this integrative approach, we conclude that Abalos Mensa formed as a distinct feature via atmospheric deposition following erosion of Rupes Tenuis and grew concurrently with the rest of Planum Boreum as the NPLD accumulated. The required processes are consistent with those observed today: no exotic phenomena (cryovolcanism, fluvial activity, or impact shielding) appear necessary to explain the formation of Abalos Mensa. Key Points Formation of Abalos Mensa is consistent with aeolian processes Combination of radar data, imagery improve scientific investigation of Mars Atmospheric modeling using paleo-topography is a novel, useful approach ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876922484&doi=10.1002%2fgrl.50293&partnerID=40&md5=0fe93bcaf6e4a5d949cc110a0498dbeb
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6439
Appears in Collections: 气候减缓与适应
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作者单位: University of Texas Institute for Geophysics, Jackson School of Geosciences, University of Texas, Austin, TX 78758, United States
Recommended Citation:
Brothers T.C.,Holt J.W.,Spiga A.. Orbital radar, imagery, and atmospheric modeling reveal an aeolian origin for Abalos Mensa, Mars[J]. Geophysical Research Letters,2013-01-01,40(7).