Radar evidence for liquid surfaces on Titan

被引：81

作者：

Campbell, DB

Black, GJ

Carter, LM

Ostro, SJ

机构：

[1] Cornell Univ, Natl Astron & Ionosphere Ctr, Ithaca, NY 14853 USA

[2] Cornell Univ, Dept Astron, Ithaca, NY 14853 USA

[3] Univ Virginia, Dept Astron, Charlottesville, VA 22903 USA

[4] CALTECH, Jet Prop Lab 300 233, Pasadena, CA 91109 USA

来源：

SCIENCE | 2003年 / 302卷 / 5644期

关键词：

D O I：

10.1126/science.1088969

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Arecibo radar observations of Titan at 13-centimeter wavelength indicate that most of the echo power is in a diffusely scattered component but that a small specular component is present for about 75% of the subearth locations observed. These specular echoes have properties consistent with those expected for areas of liquid hydrocarbons. Knowledge of the areal extent and depth of any deposits of liquid hydrocarbons could strongly constrain the history of Titan's atmosphere and surface.

引用

收藏

页码：431 / 434

页数：4

相关论文

共 18 条

[1] GALILEAN SATELLITES - 1976 RADAR RESULTS [J].

CAMPBELL, DB ;

CHANDLER, JF ;

OSTRO, SJ ;

PETTENGILL, GH ;

SHAPIRO, II .

ICARUS, 1978, 34 (02) :254-267

[2] TITANS SURFACE - COMPOSITION AND VARIABILITY FROM THE NEAR-INFRARED ALBEDO [J].

COUSTENIS, A ;

LELLOUCH, E ;

MAILLARD, JP ;

MCKAY, CP .

ICARUS, 1995, 118 (01) :87-104

[3]

EVANS JV, 1968, RADAR ASTRONOMY, pCH4

[4] Wind-driven surface waves on Titan [J].

Ghafoor, NAL ;

Zarnecki, JC ;

Challenor, P ;

Srokosz, MA .

JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 2000, 105 (E5) :12077-12091

[5] Titan: High-resolution speckle images from the Keck Telescope [J].

Gibbard, SG ;

Macintosh, B ;

Gavel, D ;

Max, CE ;

de Pater, I ;

Ghez, AM ;

Young, EF ;

McKay, CP .

ICARUS, 1999, 139 (02) :189-201

[6] Transient clouds in Titan's lower atmosphere [J].

Griffith, CA ;

Owen, T ;

Miller, GA ;

Geballe, T .

NATURE, 1998, 395 (6702) :575-578

[7] Evidence for the exposure of water ice on Titan's surface [J].

Griffith, CA ;

Owen, T ;

Geballe, TR ;

Rayner, J ;

Rannou, P .

SCIENCE, 2003, 300 (5619) :628-630

[8] BACKSCATTERING FROM UNDULATING SURFACE WITH APPLICATIONS TO RADAR RETURNS FROM THE MOON [J].

HAGFORS, T .

JOURNAL OF GEOPHYSICAL RESEARCH, 1964, 69 (18) :3779-+

[9] Preliminary measurements of the cryogenic dielectric properties of water-ammonia ices: Implications for radar observations of icy satellites [J].

Lorenz, RD .

ICARUS, 1998, 136 (02) :344-348

[10] Physical properties of ammonia-rich ice: Application to Titan [J].

Lorenz, RD ;

Shandera, SE .

GEOPHYSICAL RESEARCH LETTERS, 2001, 28 (02) :215-218