Thermal Stability of Volatiles in the North Polar Region of Mercury

被引：107

作者：

Paige, David A. ^{[1
]}

Siegler, Matthew A. ^{[1
,2
]}

Harmon, John K. ^{[3
]}

Neumann, Gregory A. ^{[4
]}

Mazarico, Erwan M. ^{[4
]}

Smith, David E. ^{[5
]}

Zuber, Maria T. ^{[5
]}

Harju, Ellen ^{[1
]}

Delitsky, Mona L. ^{[6
]}

Solomon, Sean C. ^{[7
,8
]}

机构：

[1] Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095 USA

[2] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[3] Natl Astron & Ionosphere Ctr, Arecibo, PR 00612 USA

[4] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[5] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA

[6] Calif Specialty Engn, Flintridge, CA 91012 USA

[7] Carnegie Inst Sci, Dept Terr Magnetism, Washington, DC 20015 USA

[8] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA

来源：

SCIENCE | 2013年 / 339卷 / 6117期

关键词：

COMET HALLEY; POLES; ICE; DEPOSITS; WATER; MOON;

D O I：

10.1126/science.1231106

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：

Thermal models for the north polar region of Mercury, calculated from topographic measurements made by the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft, show that the spatial distribution of regions of high radar backscatter is well matched by the predicted distribution of thermally stable water ice. MESSENGER measurements of near-infrared surface reflectance indicate bright surfaces in the coldest areas where water ice is predicted to be stable at the surface, and dark surfaces within and surrounding warmer areas where water ice is predicted to be stable only in the near subsurface. We propose that the dark surface layer is a sublimation lag deposit that may be rich in impact-derived organic material.

引用

页码：300 / 303

页数：4

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