UNUSUAL RADAR ECHOES FROM THE GREENLAND ICE-SHEET

被引：42

作者：

RIGNOT, EJ ^{[1
]}

OSTRO, SJ ^{[1
]}

VANZYL, JJ ^{[1
]}

JEZEK, KC ^{[1
]}

机构：

[1] OHIO STATE UNIV,BYRD POLAR RES CTR,COLUMBUS,OH 43210

来源：

SCIENCE | 1993年 / 261卷 / 5129期

关键词：

D O I：

10.1126/science.261.5129.1710

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：

Airborne radar images of part of the Greenland ice sheet reveal icy terrain whose radar properties are unique among radar-studied terrestrial surfaces but resemble those of Jupiter's icy Galilean satellites. The 5.6- and 24-centimeter-wavelength echoes from the Greenland percolation zone, like the 3.5- and 13-centimeter-wavelength echoes from the icy satellites, are extremely intense and have anomalous circular and linear polarization ratios. However, the detailed subsurface configurations of the Galilean satellite regoliths, where heterogeneities are the product of prolonged meteoroid bombardment, are unlikely to resemble that within the Greenland percolation zone, where heterogeneities are the product of seasonal melting and refreezing.

引用

页码：1710 / 1713

页数：4

共 20 条

[1]

Benson C. S., 1962, THESIS COLD REGIONS

[2]

Butler B. J, 1992, B AM ASTRON SOC, V24, P954

[3]

CAMPBELL DK, UNPUB

[4]

FREEMAN A, 1992, 1992 P INT GEOSC REM, P1686