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DOI | 10.1002/2017GL075844 |
Fine-Scale Layering of Mars Polar Deposits and Signatures of Ice Content in Nonpolar Material From Multiband SHARAD Data Processing | |
Campbell, Bruce A.1; Morgan, Gareth A.1,2 | |
2018-02-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:4页码:1759-1766 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The variation of Shallow Radar (SHARAD) echo strength with frequency reveals material dielectric losses and polar layer properties. Loss tangents for Elysium and Amazonis Planitiae deposits are consistent with volcanic flows and sediments, while the Medusae Fossae Formation, lineated valley fill, and lobate debris aprons have low losses consistent with a major component of water ice. Mantling materials in Arcadia and Utopia Planitiae have higher losses, suggesting they are not dominated by ice over large fractions of their thickness. In Gemina Lingula, there are frequent deviations from a simple dependence of loss on depth. Within reflector packets, the brightest reflectors are often different among the frequency subbands, and there are cases of reflectors that occur in only the high- or low-frequency echoes. Many polar radar reflections must arise from multiple thin interfaces, or single deposits of appropriate thickness, that display resonant scattering behaviors. Reflector properties may be linked to climate-controlled polar dust deposition. |
英文关键词 | Mars radar dielectric constant loss tangent |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000427564300007 |
WOS关键词 | CLIMATE-CHANGE ; GROUND ICE ; RADAR ; MIDLATITUDES ; SUBSURFACE ; PLANITIA ; WATER |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/26354 |
专题 | 气候变化 |
作者单位 | 1.Smithsonian Inst, Ctr Earth & Planetary Studies, Washington, DC 20560 USA; 2.Planetary Sci Inst, Tucson, AZ USA |
推荐引用方式 GB/T 7714 | Campbell, Bruce A.,Morgan, Gareth A.. Fine-Scale Layering of Mars Polar Deposits and Signatures of Ice Content in Nonpolar Material From Multiband SHARAD Data Processing[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(4):1759-1766. |
APA | Campbell, Bruce A.,&Morgan, Gareth A..(2018).Fine-Scale Layering of Mars Polar Deposits and Signatures of Ice Content in Nonpolar Material From Multiband SHARAD Data Processing.GEOPHYSICAL RESEARCH LETTERS,45(4),1759-1766. |
MLA | Campbell, Bruce A.,et al."Fine-Scale Layering of Mars Polar Deposits and Signatures of Ice Content in Nonpolar Material From Multiband SHARAD Data Processing".GEOPHYSICAL RESEARCH LETTERS 45.4(2018):1759-1766. |
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