气候变化领域集成服务门户(CCPortal): Radar evidence of subglacial liquid water on Mars

CCPortal

DOI	10.1126/science.aar7268
	Radar evidence of subglacial liquid water on Mars
	Orosei R.; Lauro S.E.; Pettinelli E.; Cicchetti A.; Coradini M.; Cosciotti B.; Di Paolo F.; Flamini E.; Mattei E.; Pajola M.; Soldovieri F.; Cartacci M.; Cassenti F.; Frigeri A.; Giuppi S.; Martufi R.; Masdea A.; Mitri G.; Nenna C.; Noschese R.; Restano M.; Seu R.
发表日期	2018
ISSN	0036-8075
起始页码	490
结束页码	493
卷号	361 期号:6401
英文摘要	The presence of liquid water at the base of the martian polar caps has long been suspected but not observed. We surveyed the Planum Australe region using the MARSIS (Mars Advanced Radar for Subsurface and Ionosphere Sounding) instrument, a low-frequency radar on the Mars Express spacecraft. Radar profiles collected between May 2012 and December 2015 contain evidence of liquid water trapped below the ice of the South Polar Layered Deposits. Anomalously bright subsurface reflections are evident within a well-defined, 20-kilometer-wide zone centered at 193°E, 81°S, which is surrounded by much less reflective areas. Quantitative analysis of the radar signals shows that this bright feature has high relative dielectric permittivity (>15), matching that of water-bearing materials. We interpret this feature as a stable body of liquid water on Mars. © 2017 The Authors.
英文关键词	calcium; carbon dioxide; ice; magnesium; sodium perchlorate; water; instrumentation; Mars; Martian atmosphere; radar; subglacial environment; Article; astronomy; cosmological phenomena; dielectric constant; electromagnetic radiation; electromagnetism; environmental temperature; physical chemistry; priority journal; quantitative analysis; radiation detection; radiation measurement; radiofrequency; sound intensity; south solar layered deposit; space flight; subglacial liquid water; surface property; velocity
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/244953
作者单位	Istituto di Radioastronomia, Istituto Nazionale di Astrofisica, Via Piero Gobetti 101, Bologna, 40129, Italy; Dipartimento di Matematica e Fisica, Università degli Studi Roma Tre, Via della Vasca Navale 84, Roma, 00146, Italy; Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica, Via del Fosso del Cavaliere 100, Roma, 00133, Italy; Agenzia Spaziale Italiana, Via del Politecnico, Roma, 00133, Italy; Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica, Vicolo Osservatorio 5, Padova, 35122, Italy; Consiglio Nazionale delle Ricerche, Istituto per il Rilevamento Elettromagnetico dell’Ambiente, Via Diocleziano 328, Napoli, 80124, Italy; Dipartimento di Ingegneria dell’Informazione, Elettronica e Telecomunicazioni, Università degli Studi di Roma “La Sapienza,”, Via Eudossiana 18, Roma, 00184, Italy; E.P. Elettronica Progetti, Via Traspontina 25, Ariccia, RM 00040, Italy; International Research School of Planetary Sciences, Università degli Studi “Gabriele d’Annunz...
推荐引用方式 GB/T 7714	Orosei R.,Lauro S.E.,Pettinelli E.,et al. Radar evidence of subglacial liquid water on Mars[J],2018,361(6401).
APA	Orosei R..,Lauro S.E..,Pettinelli E..,Cicchetti A..,Coradini M..,...&Seu R..(2018).Radar evidence of subglacial liquid water on Mars.Science,361(6401).
MLA	Orosei R.,et al."Radar evidence of subglacial liquid water on Mars".Science 361.6401(2018).